Th400 overdrive

Automatic 4-Speed BW 4401 2 1/2″ Tailhousing 4L80E w/fixed yoke, Gas Engine.Replaces 2 1/2″ tailhousing, requires GM speed buffer (incl).99-02 4×4 1 ton dually extended and crew cab trucks, check tail length and yoke to confirm & provide axle ratio and tire size. Price : $3,795.00.

Jul 1, 2018 ... ... 17K views · 11:05. Go to channel · TH350 vs. TH400 strength comparison. Jakes Performance•6.4K views · 18:06. Go to channel · Hasn&#...As it depends on the make, model, and year of the transmission. However, a general rule of thumb is that the torque converter ratio (TCR) for a TH350 transmission should be around 3.0. The TH400 transmission turbo is a 4-speed automatic transmission. It has a Ratios of: 1st Gear: 3.42 2nd Gear: 2.92 3rd Gear: 2.48 4th Gear: 1.Underdrive And Overdrive Your Factory Transmission With Some Help From Gear Vendors. ... TH350, TH400, 700-R4, 4L60E, M21, M22, and T-10. Simply put, a Gear Vendors unit replaces the existing ...Th400 is not an overdrive transmission. This is a big difference which Th400 lacks, compared to 700r4. The overdrive feature is fitted to the fourth gear of the 700r4; this offers a 30% increase. The overdrive gives a better alternative to direct drive, stepping up the gear ratio of the car. This gives 700r4 a higher speed ratio than Th400.But the TH350 and TH400 three-speed versions (and their two-speed Powerglide cousin) fall short when it comes to highway cruising. The reason for this is …According to Gear Star’s Zack Farah, each comes with a 24-month/24,000-mile warranty to back it up. Replacing the old TH400 with Gear Star’s Level 3 4L60 in a ’72 Chevy C-10 was basic, but care needs to be taken while adjusting the TV cable to ensure the right change in line pressure inside the tranny to coincide with how much your foot ...Both the TH350 and TH400 are three-speed automatic transmissions with overdrive capability. The TH350 is also slightly lighter than its counterpart due to differences in its construction materials. The th350 transmission uses an aluminum alloy case and steel gears while the th400 has an iron case and hardened steel gears.

This is a very rare 12,000lb GVW overdrive unit for a short tailshaft TH400 manufactured by Doug Nash Engineering. This one is in good condition.Jan 29, 2018 · Clearly, the biggest difference between the TH400 vs 4L80E is the 4L80E’s overdrive gear. Although they come from different eras, there is quite a bit that these two transmissions have in common. The mere fact that people are so interested in this topic is a testament to the absolute bulletproof reputation of the TH400. There aren’t too ... It is a US Gear Dual Range Auxiliary Overdrive unit that bolts in between a Chevy TH400 transmission and your transfercase (6 bolt round). This works, in terms of adding OD to a transmission, like a Gear Vendors unit except this is intended to allow you to be in four wheel drive as it bolts between the transmission and the t-case.Indices Commodities Currencies StocksI have and am very happy with the 400 turbo in my '39 350 powered p/u but as I get it more and more dependable and now have up-graded the suspension, brakes and steering I would like to consider overdrive for highway trips. What are the options out there and would like to hear opinions.GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Opens in a new window or tab. Pre-Owned. $1,500.00. transmart4x4usainc (1,302) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL . Opens in a new window …This is a great thread--- thanks to ALL you guys!!! Was considering 4L80E swap sometime ago but instead went with the Gear Vendors install to my 1008, finally, and it's a wee-bit disappointing that with the TH400/GVunit, you really only gain about 8-10 mph speed increase in overdrive.3-Speed Transmission Work Horse. JW Performance TH400 Transmissions were originally released in 1964 and are an ideal racing automatic transmission for ...

Gear Vendors TH400 Under/Overdrive With 4" Tailhousing. Give your transmission up to twice the forward gear ratios with the UNDER/OVERDRIVE auxiliary transmission from Gear Vendors. This supplemental planetary gearbox adapts to the output shaft of your existing transmission to provide an extra gear of 0.78 :1. The initial benefit is the ...While the TH400 lacks the overdrive gear of the 4L80E, every other gear is the same. Here are both transmissions gear ratios. These transmissions combined have …After some serious research and comparison I finally ordered the transmission components for the 64PRONOVA project. First there's the ATI Supercase TH400 with transbrake rated at 1,500 HP. 8 week lead time so I ordered today. Building A Bullet-Proof Turbo 400 With ATI Performance. Next was the Gear Vendors overdrive unit (rated at 1,200 HP).132 posts · Joined 2021. #1 · Nov 5, 2021 (Edited) I swapped out my original 69 Chevelle SS396 TH400 transmission for a 700r4 overdrive using the original staple floor shifter setup, I have a couple questions, the help is greatly appreciated. 1. I cannot for the life of me manually put the tranny into first gear. This chart breaks down the five types of Sonnax TH400 transmission parts available at different performance levels. Combine these with other Sonnax TH400 upgrades for a top-notch rebuild. Our Sonnax-equipped, in-house built TH400 survived hot lapping 3 - 4 passes every day for 5 days and survived on the 1,200-mile drive flawlessly.

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Jeep, Ford small-block and Buick V-6 adapters are available to convert your 4WD to the TH400. Used TH400s are available for between $200 and $500, depending on their mileage. Many companies offer rebuilts, which sell in the $600 to $900 range, but cores are usually required. Neutral switches sell new for around $50.The kit, which retails for $2,495.00, includes a TH400, Streetmaster torque converter, trans mount, dipstick, transmission cooler, and a case of fluid. Follow along as we swap out the old trans ...PIONEER BALANCED ESG FUND CLASS A- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksThe GM factory officially refers to a 400 trans as a Turbo-Hydramatic (TH) and it first appeared in the GM lineup back in '64. The 400 moniker's origins are unknown. The transmission had a long ...Be radical—unplug and disconnect, live in the moment and concentrate on doing one important thing at a time. Try it for an hour, then for a day. A common experience: you are walkin...1023 posts · Joined 2006. #1 · Sep 12, 2008. A good friend of mine just picked up a 66 nova with turbo 400 that is equipped with an aftermarket Doug Nash overdrive unit. It is the weirdest set up I have seen. It bolts to the back of the th400 and has a switch in the car to shift to overdrive. He is thinking about taking it out.

With a TH350 or a TH400, your car would be turning about 3,000 rpm at 70 mph. On the other hand, that 3,000 rpm multiplied by an overdrive ratio of 0.70:1 yields a cruise rpm of 2,100. That’s a...i like the thought of keeping my th400 but have overdrive. at $3100 it wont be happening till later this year if at all. nothing needs modifying except rear drive line length. is there a way to justify this over 4l80 swap? it'd be nice to hear from the knowledge base here on the matter, maybe i can start scouring CL for a rebuilt/rebuildable ...TH400. A Gearstar-prepped TH400 (left) and an ATI unit (right). Despite the current technology of today's transmissions, the Turbo-400 remains to be a favorite amongst enthusiasts. ... The 700R4 was released in 1982 as the first 4-speed automatic transmission with overdrive available for GM vehicles. Initially only available in the …May 16, 2021 · GM 4-Speed Auto - Gearvendors. GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. 700R4/4L60E’s have a low 3.06 first gear which is good for initial take off but this... The 4L80E is just a longer, heavier, overdrive version of the TH-400. It uses the same first three gear ratios but adds a 0.75:1 overdrive. This means that with a 3.55:1 rear gear, the overdrive drops the …Being an entrepreneur is a full-time job. There are no days off, and it's a lot of hard work. Here are my 7 MUST-KNOW tips for every entrepreneur. Being an entrepreneur is a full-t...If you’re a book lover who is always on the lookout for new titles to devour, then you’ve probably heard of NYPL Overdrive. NYPL Overdrive is an innovative platform that allows lib...February 7, 2013, 12:37 PM. I'm seriously considering a GV overdrive for my 55 chevy, in case you don't know it has a mild blown big block, and TH400, and I drive it everywhere as well as race occasionally. I don't really know how a GV operates, as far as how automatic the shifting is, how downshifting works, whether Park still works, etc.With auto overdrive transmission. Verifiy 1pc. Or 2pc. Tailhousing prior to ordering. Price : $ 3,795.00. Quantity. Buy. View Larger Image. ... TH400 Transmission.Replaces both 4 3/4″ & 3 1/2″ tailhousings totalling 9 1/4″.88-newer 4×4 GM and standard and extended cab pickups with electronic speedometer.

This is a very rare 12,000lb GVW overdrive unit for a short tailshaft TH400 manufactured by Doug Nash Engineering. This one is in good condition.

The Gear Vendors under/overdrive is an extremely heavy-duty auxiliary transmission that's easy to install, gives you a 0.78:1 underdrive or overdrive, can improve your fuel mileage up to 20 ...This chart breaks down the five types of Sonnax TH400 transmission parts available at different performance levels. Combine these with other Sonnax TH400 upgrades for a top-notch rebuild. Our Sonnax-equipped, in-house built TH400 survived hot lapping 3 - 4 passes every day for 5 days and survived on the 1,200-mile drive flawlessly.Shifter Conversion Kits, Automatic Transmission, Converts Stock Powerglide Floor Shifter To Work with TH350 or TH400, Chevrolet, Kit. Part Number: SIW-SC2031-C. ( 1 ) Estimated Ship Date: Today. Free Shipping. $191.99. Add To Cart. Compare. Wish List.700R4. The 700R4 is an improved and upgraded model compared to its predecessors-TH350 and TH400. The GM THM700R4 is a 4-speed automatic-shift overdrive transmission installed longitudinally (front to back) over vehicle chasses. The 700R4’s performance is comparable to the GM 200-4R but sports a lengthier transmission.This video covers the vehicle setup and steering wheel configuration as well as how to use the GV overdrive switch buttons in auto and manual mode. I also ta...Aug 2, 2004 · I just had a Level 2 - 200r4 from Bow Tie overdives installed. The big difference between the 700 and 200 is the first gear ratio. The 700 is 3.06 and the 200 is something like 2.7. This means a lot less of a torque drop unless your engine is built for it. I'm still evaluating the difference from the TH400 to the 200. The Gear Vendors overdrive is available from summit racing. (www.summitracing.com) The catalog price is listed as $2295. It is essentially a two speed automatic trans that bolts in place of the tail housing in the th400. You still have to shorten the drive shaft and you may have to worry about the clearance with the floor.If you’re a book lover who is always on the lookout for new titles to devour, then you’ve probably heard of NYPL Overdrive. NYPL Overdrive is an innovative platform that allows lib...Muscle Cars / Hot Rods GEAR VENDORS can give your GM / Dodge / Ford vehicle up to twice the forward gear ratios, unparalleled performance and the ultimate in horsepower handling of any auxiliary transmission. There is no competing underdrive or overdrive transmission available on the market that will give you the performance of a … Continue …The 700R4 Conversion Kit includes most everything you will need when attempting a conversion, minus the driveshaft work. This Conversion Kit is often used when converting from a TH350, TH400, or Powerglide transmission to the 700R4 transmission. Monster Sale Price: $549.99. Buy in monthly payments with Affirm on orders over $50.

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Feb 15, 2011 · I've been asked several times about seperating the overdrive. At this moment I don't want to seperate it. I don't have the tail piece for the TH400 and dont want to deal with making that functional again without the overdrive. Also, we would be interested in trading for a BBC supercharger, preferably a procharger. Thanks Paul The TH400 ( Figure 1) has four endplay tolerances (NOT to be confused with clutch clearances) that should be examined and corrected during repair. However, GM’s published rebuild procedure only references two of them! With two endplay tolerances being ignored, you can imagine why these meltdowns are occurring. Figure 1.Th400 is not an overdrive transmission. This is a big difference which Th400 lacks, compared to 700r4. The overdrive feature is fitted to the fourth gear of the 700r4; this offers a 30% increase. The overdrive gives a better alternative to direct drive, stepping up the gear ratio of the car. This gives 700r4 a higher speed ratio than Th400.***FOR TH400, soon C4 & 4L80E overdrive trans @ $6500.00 complete with one ratio of choice or $11,500.00 with 5 different ratios. Attachments. underdrive CLIP_FNL.jpg.But the TH350 and TH400 three-speed versions (and their two-speed Powerglide cousin) fall short when it comes to highway cruising. The reason for this is …Nov 30, 2021 · The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1. I already have crossover steer. I have the original 4l60 trans but I also have a 700r4 k case but both need rebuilt. I’m wondering if I would be better off rebuilding my 700r4 and upgrading it or getting a th400 and a gear vendor’s overdrive unit. I plan to use it as a dual purpose rig.Th400 overdrive on 1001 Blocks. For more information, click on the thumbnail to see the photo of the product, or on the link below in order to access its ...since your Overdrive of 3.20 would only be when you are on the Hwy ! If you look at my Sig you can see I like a 3.70/3.73 Gearing with my TH400 for Street/Hwy/ Strip use = C. I have a 3,500 to 6,500 Stall Converter that is Customized to my Engine details / Trany / how I use my CarGEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Opens in a new window or tab. Pre-Owned. $1,500.00. transmart4x4usainc (1,302) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL . Opens in a new window …This Monster Powertrain Package is complete with all the features you need for a reliable Chevy 383 & Automatic Overdrive TH400 Transmission from a researched and developed combination of components. INCLUDED FREE - No Fault Warranty A 1-time no questions asked repair or replacement. Covers Shipping, Freight claims, Installation errors ...Here is our guide to the GM transmission recommendations for high performance to ensure you get the best automatic transmission for drag racing. You will be getting an engine that is durable, lightweight, and efficient. First off, GM overdrive automatics are quite popular on the street, whereas powerglide and TH400 are notable … ….

It is a US Gear Dual Range Auxiliary Overdrive unit that bolts in between a Chevy TH400 transmission and your transfercase (6 bolt round). This works, in terms of adding OD to a transmission, like a Gear Vendors unit except this is intended to allow you to be in four wheel drive as it bolts between the transmission and the t-case.Overdrive Conversion Packages; Black Beast Diesel Transmissions; In Stock Ready To Ship Transmissions; SHOP Engines. Ford Engines; Chrysler/Dodge Engines; GM Engines; ... Turbo 400 TH400 Transmission Mild Rebuild 2WD : 9" Tail with Free Transmission Fluid. $2,273.75 Monster Sale Price: $1,849.00. Sale Add To Cart Got Questions? Give Us A …The TH400 transmission speaking is a three-speed, automatic-shift longitudinally set transmission constructed durably for long-term use. The longitudinal placement of the …I don't have an older planet here to verify. Hope I helped some! 71 SS 454 TH400 2.74 1st gear GV Overdrive 3.55 Gear SC&C Stage 11 QA1's 4 Wheel Baer Brakes AGR Box Straub SR .630 .612 lift 240 256 [email protected]. 83 K20 454 TH475 NP 205 Dana 60 Track Lok Detroit Locker Rear.GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Pre-Owned. $1,500.00. transmart4x4usainc (1,295) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $350.00.GM 3-Speed Automatic Truck/Motorhome. With the GEAR VENDORS dashswitch in “auto” you will have automatic overdrive just like the vehicle came with a factory system. The GEAR VENDORS will shift on and off without attention of the driver and can be used while towing up to combined weights of 30,000 lbs. An interactive floorswitch is …Also, adding a GV unit is just one more thing to deal with. I do think they make a very high quality product but is still adds complexity. But, if you want to keep the TH400 for any reason, I totally get that. 1968 Camaro SS “Clone” with Blueprint Engines 355. Muncie M20 4 speed, 8.5” 10 bolt / Eaton Truetrac with 3.42s.They are pricey new, but they're tough and can be installed behind many different transmissions. 71 SS 454 TH400 2.74 1st gear GV Overdrive 3.55 Gear SC&C Stage 11 QA1's 4 Wheel Baer Brakes AGR Box Straub SR .630 .612 lift 240 256 [email protected]. 83 K20 454 TH475 NP 205 Dana 60 Track Lok Detroit Locker Rear.The Turbo 400 transmission, also known as the TH400, has a transmission fluid capacity of 6 quarts. This amount equates to 12 pints of fluid total. The TH400 is an automatic transm...4. Coupler for hooking the TH400 tailshaft to the AUX. O/D Input shaft. 5. Couple slid on, and note the factory lip on the TH400. 6. Tranny end of the Adapter plates, note lip to accept the lip on the TH400. 7. This is the end view of the TH400 with the Adapter bolted inplace. Th400 overdrive, 34580 - th400, overdrive planet, uses sprag with 0.309" od rollers, 1991-01 - gm, 700R4. The 700R4 is an improved and upgraded model compared to its predecessors-TH350 and TH400. The GM THM700R4 is a 4-speed automatic-shift overdrive transmission installed longitudinally (front to back) over vehicle chasses. The 700R4’s performance is comparable to the GM 200-4R but sports a lengthier transmission., The Ultimate in Horsepower Handling and Performance. Get Expert advice about your vehicle. Call us at 800-999-9555. GEAR VENDORS provides overdrive product to racing cars and trucks up to 2000hp and trucks towing heavy RV’s up to 25,000lbs gcvw. Whether you are trying to move a couple tons up a steep incline or moving just a couple thousand ..., That's the overdrive version of the TH400 but it is little different in size. Really good transmission though and better gears for the street than the 700R4/4L60(E) is. The 4L60 basically is a renamed 700R4 and the 4L60E is the electronic version of it. Both the 4L60E and the 4L80E will need a controller which adds an expense., Jul 28, 2014 · But the TH350 and TH400 three-speed versions (and their two-speed Powerglide cousin) fall short when it comes to highway cruising. The reason for this is the conspicuous lack of an overdrive gear ... , Looking to improve highway mileage on late model trucks, beginning in 1991 GM upgraded the original TH400 by adding a 0.70:1 overdrive along with complete electronic control to create the 4L80E. This trans is significantly larger and heavier than its three-speed predecessor, but like the 4L60E it is easily employed for performance use in ..., The GM 4L80E 4-speed overdrive transmission is the ultimate overdrive platform to suit virtually combination that requires the strongest overdrive transmission possible. Hughes Performance has a 4L80E transmission available for practically any engine combination and power level. Our Street/Strip series 4L80E is a great choice for combinations producing …, We'll use our 4.10 rear-axle ratio and the 2.48 first-gear ratio of the popular GM TH400 automatic ... The overdrive can also be used to split gears on wide-ratio split transmissions. The torque ..., Not only will an Overdrive Transmission improve your performance, but it will reduce your fuel consumption by up to 33%. We have everything you need to make the conversion from the older TH350, TH400, and Powerglide to the newer Overdrives., 945 posts · Joined 1999. #1 · Nov 12, 2018 (Edited by Moderator) TH400 Gear Vendor Overdrive - unit and electric components. TH400 Gear Vendor set up. Initially purchased in 2004 - switching to overdrive tranny. going to ship to Gear Vendor approved source (or gear vendor main) so they can provide report of condition. will send …, Typical 4L80E converter charge pressure during high load is usually around 100 PSI, with a maximum line pressure of 180 PSI. 100 PSI of converter charge pressure generates 89 pounds of rearward thrust on the overdrive planetary gearset, forward clutch housing, and mainshaft. Unlike the TH400, lube pressure doesn’t raise rearward thrust., February 7, 2013, 12:37 PM. I'm seriously considering a GV overdrive for my 55 chevy, in case you don't know it has a mild blown big block, and TH400, and I drive it everywhere as well as race occasionally. I don't really know how a GV operates, as far as how automatic the shifting is, how downshifting works, whether Park still works, etc., The TH400: The Big-Block Standard. Stepping up, the TH400 or THM400, stands as a heavier, bigger, and longer three-speed automatic transmission, designed for GM’s big-block automotive engines and renowned for its strength. The 700R4: Advanced Overdrive Innovation, Mechanical Overdrive on TH400. I have a mechanical overdrive that replaces the tail shaft on a TH400 transmission. I have tried everything to find out what it is and who made it. My BB Chevy is pushing 700HP and the overdrive holds up. The only markings on it are R11-1P, W.G. Div. and J-26-62 which would suggest it was built …, Oct 21, 2016 · Typical 4L80E converter charge pressure during high load is usually around 100 PSI, with a maximum line pressure of 180 PSI. 100 PSI of converter charge pressure generates 89 pounds of rearward thrust on the overdrive planetary gearset, forward clutch housing, and mainshaft. Unlike the TH400, lube pressure doesn’t raise rearward thrust. , You can think of this trans as basically a TH400 with a 25 percent overdrive tacked on. The 4L80E transmission was mostly used in 34- and 1-ton trucks and larger SUV applications beginning in 1991., The 4L85 (left) is 50 pounds heavier than the Turbo 400 (right), but the overdrive is a benefit we feel overshadows the extra weight issue. Speaking of weight and dimensional differences, a Turbo 400 with no fluid or torque converter weighs between 135 and 140 pounds. Conversely, a 4L85 weighs 185 to 190 pounds when weighed with the same ..., The biggest names in automatic transmissions are here—shop Summit Racing now! No matter what you drive—street machine, drag race or oval track car, tractor puller, or whatever—we’ve got an automatic transmission for you. That includes popular transmission types such as Powerglide, TH350, TH400, C-4, C-6, 700R4, 4L80E, AOD, E4OD ..., Underdrive And Overdrive Your Factory Transmission With Some Help From Gear Vendors. ... TH350, TH400, 700-R4, 4L60E, M21, M22, and T-10. Simply put, a Gear Vendors unit replaces the existing ..., The 700R4 Conversion Kit includes most everything you will need when attempting a conversion, minus the driveshaft work. This Conversion Kit is often used when converting from a TH350, TH400, or Powerglide transmission to the 700R4 transmission. Monster Sale Price: $549.99. Buy in monthly payments with Affirm on orders over $50., In today’s digital age, reading has taken on a whole new form. With the advent of smartphones, tablets, and e-readers, more and more people are turning to eBooks and audiobooks for..., Typical 4L80E converter charge pressure during high load is usually around 100 PSI, with a maximum line pressure of 180 PSI. 100 PSI of converter charge pressure generates 89 pounds of rearward thrust on the overdrive planetary gearset, forward clutch housing, and mainshaft. Unlike the TH400, lube pressure doesn’t raise rearward thrust., Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors.These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse.. The Turbo-Hydramatic or Turbo Hydra-Matic …, Hence, th400 has an irregular fluid pan shape, but with a nine-angle, 13 bolt pan design. 2. Overdrive. Th400 is not an overdrive transmission. This is a big difference which Th400 lacks, compared to 700r4. The overdrive feature is fitted to the fourth gear of the 700r4; this offers a 30% increase., The TH400 ( Figure 1) has four endplay tolerances (NOT to be confused with clutch clearances) that should be examined and corrected during repair. However, GM’s published rebuild procedure only references two of them! With two endplay tolerances being ignored, you can imagine why these meltdowns are occurring. Figure 1., Essentially a TH400 with overdrive and more rugged internals, the GM 4L85E is the ultimate automatic. When built right, they can handle over 1,000 hp reliably, and best of all, transplanting one ..., But when replacing a TH350 trans, you must either relocate the frame’s crossmember mounting holes to the rear approximately 1 inch or, if your car ever came originally equipped with a TH400 ..., Mar 12, 2011 · They are pricey new, but they're tough and can be installed behind many different transmissions. 71 SS 454 TH400 2.74 1st gear GV Overdrive 3.55 Gear SC&C Stage 11 QA1's 4 Wheel Baer Brakes AGR Box Straub SR .630 .612 lift 240 256 [email protected]. 83 K20 454 TH475 NP 205 Dana 60 Track Lok Detroit Locker Rear. , That's the overdrive version of the TH400 but it is little different in size. Really good transmission though and better gears for the street than the 700R4/4L60(E) is. The 4L60 basically is a renamed 700R4 and the 4L60E is the electronic version of it. Both the 4L60E and the 4L80E will need a controller which adds an expense., Not only will an Overdrive Transmission improve your performance, but it will reduce your fuel consumption by up to 33%. We have everything you need to make the conversion …, This ratio is ideal for getting the best speed. If you want to get your car moving fast, get the TH400. And according to Gear Star, 4L80E transmissions have nearly 25% overdrive and are 4 inches longer than the TH400. On the other hand, a higher overdrive gear ratio facilitates faster acceleration. The 4L80E has such a ratio, which is 0.75:1., Bibliophiles rejoice: Sonos now integrates with Libby, the app from audio and e-book service OverDrive, which connects you to free content from your local public library. Bibliophi..., This chart breaks down the five types of Sonnax TH400 transmission parts available at different performance levels. Combine these with other Sonnax TH400 upgrades for a top-notch rebuild. Our Sonnax-equipped, in-house built TH400 survived hot lapping 3 - 4 passes every day for 5 days and survived on the 1,200-mile drive flawlessly.