Th475 vs th400 If you are trying to determine the TH400 from another in a vehicle, a fast way to tell is to look at the kick down mechanism. A planetary gearset has three main components: Sun Gear, Planet Gears and Carrier along with a Ring Gear. Jun 7, 2007 · A discussion thread about the differences between TH475 and TH400 transmissions, with photos and VIN codes. The powerslide in stock form was iffy but sometimes favored for use its compact size for use in smaller bodied or space limited vehicles,it needed a lot of heavy duty mods to live behind a BB but worked very well when built right. Its used behind small v8 with lower power out put and some v6's. The converters will swap also, assuming you don't have a switch-pitch trans. 73 gears out back as a mid stall converter(2800-3000) and a gearvenders is a bad idea(i'm told) Nov 6, 2008 · I have 180hp 5. Crossover steering, Boxed Frame. 48 low gear ratio from GM stock, period. The TH400 uses an electrical slide switch, which is controlled by the throttle linkage. The reaction carrier and out put The TH475 was an extra-heavy-duty version, and was found in larger trucks from 1971 on. Jun 25, 2010 · My understanding has been that the difference between these two transmissions is that the TH475 has some straight cut gears that are noisier and stronger and that the TH475 has support for a tail-shaft e-brake. 73 Dec 9, 2007 · M40 was another GM name for TH400. Read More: 545RFE Transmission—All You Need to Know. want to run the 3. A 2WD TH400 setup will have a cone, like this: The TH475 will have this adapter: A 4x4 TH400 will have a different adapter, and those vary, depending on the transfer case: Jun 18, 2007 · And any side loading is better controlled by the TH400's generous center support bushing, probably 3" of length compared to not quite an inch on a TH350 in stock form or a little less than 2" in modded form. they like to break off. Learn about the history, identification and adaptability of the TH400, a legendary three-speed transmission used in GM and other vehicles. Nov 21, 2005 · "There are two significant variations of the TH400. The TH400 is conservatively rated at 450 ft. Aug 25, 2006 · Gentlemen, The TH350 came with a 2. th350 extensively. 10 gears, 400-Th-400 & NP-205 with Divorced Auxillary Trans. Jul 5, 2006 · im not talking about the '86 older th400 trans 32 spline trannies its not the same as the old '86 older th400 i have had several more since i posted this and the 2wd ones are always 27 spline output yes i know th400 were and are 32 spline always but these LJA tagged 3L80HD are 27 spline output maybe you have not seen one yet Jan 13, 2016 · TH400, with no tail cone, or adapter: TH400(and 4L80E) common output shaft stick-outs: Either a TH400 or a TH475 will have the 6-bolt hex pattern on the main case. An automatic transmission contains two complete planetary gearsets folded together into one component. 27 Shipping , 30-Day Returns, eBay Money Back Guarantee TCI Speedometer Gear, Drive, 15-Tooth, Plastic, Gray, GM, TH375, TH400, TH475, Each Part Number: TCI-880019A. 75 low gear set and it's fantastic! Oct 10, 2021 · The "kick down" switch locations for the Turbo 400. " The planetary creates all of the different gear ratios that a transmission is able to produce. of input torque. Most of them had a drum emergency brake on the tail shaft as they were used in motor homes, C50 or bigger trucks, and busses. May 23, 2009 · if you took it out and had all seals replace and leaks again. most likely leaking aroung where hub is welded or where the side of it gets welded. The TH400’s high-level of adoption could be tied to its remarkable features, and it proved that people can once again rely on GM transmissions. 5" Bolt Circle Oct 6, 2016 · I know that early th400's (1964 only?) came with a dog bone type sprag in the planetary vs a low roller clutch. 00 first gear set and 3. 21 Buy It Now , $89. Dec 1, 2009 · The cost to build up a GM trans Th400,Th475 or 4l80e to take the power of the Cummins other than stock is waste of $$ . I will get back with you guys on the total cost and parts info. Nov 30, 2023 · That's fantastic information there^ Dave. He did say that the TH375 (kind of a light duty TH400)will have THM-375 cast into the bottom of the tailhousing, not really rellavant but still god to know. The main piece adapter plate is only $265. Will trany live and is this a good adapter. Mar 1, 2009 · Turbo 400 Trivia. Feb 5, 2006 · anyone know who makes the 3. is there a pilot bushing inside of crank since motor may of come from a manual tranny. There were never any other gear ratios offerred from GM. Jun 3, 2005 · The TH400 is by far the stronger unit,always was. I don't know if there is a similar designation for the TH375 or TH475. Jan 14, 2016 · A user asks how to identify a transmission with tailshaft mounted parking brake and gets various suggestions and opinions from other users. Thanks again. 52 low gear ratio from GM stock, period. Also wondered about internal component differences between TH400 and TH475 beyond the straight cut planetaries. The 85 GMC was originally equipped with a V6/TH400. 00 first gear set for a th400 and what power it'll take. So my question is, is it a TH400 or a TH375 that were used with a V6s and how can you tell the difference between the two? Nov 14, 2010 · :Smarty: What is a TH-475 Transmission? I heard that they are TH-400 trans,used in motorhomes,they have straight-cut gears,low gear set(2. Even comparing the th350 vs. They affect a vehicle’s performance. 48 1. After talking to someone I was told it might be a TH375. Jun 28, 2008 · Yes, the guts are all pretty much interchangeable with TH400 parts. It is widely regarded to be a supremely durable and legendary transmission. The thread covers FI code, bolt-on yoke, slip yoke, and straight cut gears. and what needs to be done to a th400 to live behind a 496 and a leadfoot. Might run into drive shaft issues if the drum brake is present. Feb 7, 2013 · I have a very nice TH475 I'm trying to convince myself to use. It does have the TH400 case and internals but its not as hd at a TH400 or a TH475. th400 weight, the turbo 400 is heavier. The TH400 is an automatic shift, three-speed, longitudinally positioned transmission. Aug 30, 2008 · According to him there are no visual differences between the th400 case and the th475 case, other then the info on the ID tag. The Turbo 400 is rated conservatively at peak torque of 450 lb-ft. Good news!! They can order everything I need for the TH400 swap to the 6BT. Dec 22, 2022 · Learn how the TH475 and the TH400 are similar and different in terms of gear cut, pan depth, noise and applications. Straight cut gears, and a HD case, especially in the bell-housing area, or so I've been told. Its only knocks are the long housing (which is still shorter than the newer OD automatics) and the lack of a fourth The other variant of the Turbo 400 transmission was the TH475; a heavy-duty transmission used extensively in large trucks from 1975 onwards. Transmission, Adapter, Transfercase Discussion Nov 12, 2013 · C3 Tech/Performance - TH400 and 3. In the case of TH400, there are three gears – first gear, second gear and Dec 1, 2004 · So, you might need to round up three transes to make one short shaft switch pitch TH-400: The '65-'67 SP for the converter & workings, a later BOP TH-400 for the correct bellhouse pattern case with speedo drive accomodation, and a short shaft (even a Chevy type will do) to supply the short output shaft & tail housing. for Cummins here in Las Vegas. Apr 17, 2008 · TH400 swap hardware I called the parts dept. It is identified easiest by its “375-THM” designation cast in the underside of the tail housing. TH375 and TH475 are the two variants of the TH400. 73 gears - Hi Guys, I wanted to ask if anyone out there has/have ridden in any Vettes with an automatic transmission that had lower gearing. This article has explained and compared the th400 vs. lbs. A gear ratio is simply speaking, the ratio between the number of teeth on two gears when meshed together. 00 1974 C25 LWB: 454 4bbl Carb / TH400 / 3. It's going behind a nothing-special 350 V8 to be used for hauling and towing, such as a stock trailer and farm wagons, so wondering if I should Jun 7, 2007 · TH475 vs TH400 The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board TH475 vs TH400 - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. replace torque converter. 36 a Sep 9, 2012 · Is there anyway to tell if its a TH475? I thought they also have lower gear ratio setup vs stock th400 2. 19. It's a 1987 TH400 which will have the roller-type sprag. Would 3. There should be a tag on the passenger side close to the governor plate. I've seen that in a Pontiac service manual, seems like even a Chevy service manual. This popular transmission was found in GM’s cars, as well as, Rolls-Royces, Jeeps, Jaguars, Ferraris, etc. Feb 13, 2011 · GM flex plates often have dual bolt spacing (6 bolt holes) to fit a torque converter with either a 11. Front Pump Gasket & O-Ring GM TH375 TH400 TH475 3L80 HD Transmission All Years See Details on eBay available at $34. It has the same output shaft as a TH350. In my application these are both advantages but I've been unable to find anything in print that really confirms either to be true. The Turbo 400 is compatible with most Jeeps. The TH475 was an extra heavy-duty version that was used in larger trucks starting in 1971. Jun 2, 2007 · Cummins 4BT & Diesel Conversions Forums. TH400 intermediate clutch pressure plate is held into the case by a snap ring, locking into a groove in the aluminum splines in the case. The TH475 was an extra-heavy-duty version, and was found in larger trucks from 1971 on. That being said, this transmission is commonly used in hot rods and paired with engines making far more torque, although these transmission also must commonly updated with some aftermarket parts. 73 be too much for a TH400 (or is 3. Jan 29, 2008 · 1972 Chevy K-30 Extendid Cab Dually 4" Lift 4. 400 th400 th375 th425 th475 3l80 transmission parts & rebuild kits Sort By: Featured Items Newest Items Best Selling A to Z Z to A By Review Price: Ascending Price: Descending 125 125C 200 200C 2004R TH350 TH400 700R4 4L60E 4L65E 4L70E 4L80E 4L85E 4T60 4T60E 4T65E CD4E TRANSMISSION FILLER TUBE BOOT FITS '69+ (1259475) About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. in 72-76 there was an oddball th375 which was a th400 with 27 spline output shaft and had 375 cast under the tail somewhere, really similar to the 3L80HD trannies, but wrong Jan 20, 2024 · Changes Through the Years: Pan - Case Belly The below table is an excerpt from my 'TH400 Fast Facts' reference doc showing all changes that were made to the TH400s starting with the pan and filter designs and concluding with the case belly (see the Fast Facts doc for a full list of all changes - I'll update/correct/revise as I become aware of any new or incorrect information). Apr 2, 2011 · How to tell a TH475 from a TH400: Were installed in light heavy duty trucks and RV's (this one came out of an RV) 6 bolt converter Factory deep pan Tailhousing mounted parking brake Internal: Straight cut planetaries!! (real reason I bought it) About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The TH400 or Turbo 400 is a good transmission that was used in several cars years ago. TH475 vs TH400 The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board TH475 vs TH400 - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. GM Chevy TH325, TH350, TH350C, TH400, TH475 Transmission Non Lock Up Torque Converter 13" Body Diameter, Slotted Hub Type, 3 Mounts, Pad Mount Type, 11. When looking at a Jeep that came from the factory with the Turbo 400, it’ll be bolted to either the BW 13-39 or the Dana 20 transfer case. The Th400 came with a 2. 55 or 3. Thank you very much!! Now with all this mismatch of parts being bought and sold on the internet concerning TH400 parts vs. The TH375 was a version of the transmission used from 1972-1976 in smaller displacement cars. 42 or 3. 50" and 10. I personally would just mate a 400 to the BB But, when the decision lies between two big and popular brands; TH350 vs TH400 transmission, you’ll need more than your intuition to guide you. You can quickly identify the Turbo 400 transmission by checking out its kick-down assembly. The stall is so low and tight that just putting it into drive sounds like I'm popping the clutch and my 4bt is struggling to keep running. Users share their opinions and experiences on the performance and durability of these transmissions in various vehicles. Find out the pros and cons of each transmission and where to buy or sell them. I'm fighting the urge to build a "super case" M22 Muncie for this car. 75 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Sep 9, 2009 · these are a longer total length than the 86-older th400 trannies in which were 32 spline output still, unlike the new '87-up 3L80HD variant in which are 27 spline output. The TH475 was a heavy-duty version of the TH400, found in larger trucks from 1971 on. Aug 16, 2020 · TH475 is the same as a TH400 externally. I hope you guys don't mind but my car is a 64 Pontiac with a 500+ ft-lbs 462 with a lopey 308/320 cam. Mar 25, 2018 · Hello folks, I'm in the process of rebuilding a TH400 transmission for my 1983 K20 4x4 project. In stock form it handled 500 ft-lb of torque in a 5,000 lb Toronado, so yeah, I think it will handle an SBC in a lightweight sand rail just fine. The Turbo 375 was a version of the transmission used from 1972 through 1976, in small displacement cars. Aug 3, 2023 · TH400: Valve Body: Provisioned for 10 valve body-case bolts - will interchange w/1965 12-bolt valve bodies: No leaks will occur if you leave two bolt holes empty when bolting a 1965 valve body to a 66+ case: 1964-1966: TH400: Valve Body: 1-2 shift valve adjusting screen: Check height prior to removal: 1964-1966: TH400: Valve Body; Filter Generally, the Th400 is larger and longer than the 350. This transmission uses an electric slide switch that controls the throttle linkage mechanism. Final Words. Aug 13, 2009 · I just wanted to do a follow up. Jul 27, 2020 · Also, I wanted to get a more in-depth forum with opinions on how to convert the TH475 into a regular TH400. Want to put that truck TH400 in your car?Went to convert the transmission to accept a slip yoke?There is more to it than just swapping yokes!Watch this short Oct 10, 2008 · They are JEEP drivetrain specialists who manufactures adapters to use TH400 in JEEPS. It is identified easiest by its "375-THM" designation cast in the underside of the tail housing. Nov 30, 2012 · Currently the TH400 is in the 85 GMC. Each of these three components can be the input, the output or can be held stationary torques: th400/th475, torque converter, 3 pads, 30 splines, 1300-1500 stall, codes: none, b3 Mar 28, 2006 · It might be a TH-375 it uses fewer clutch's and plates than the TH400. Although the production years of the Turbo Hydra-Matic (TH) 350 and TH 400 were as far as the 1960s, their durability, strength, and performance remain top-notch. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. I have the Turbo 400 installed now with the CK Performance 2. Turbo 400 Performance Specs. I have a '68 with 3. While the Th400 is about 24-3/8 inches long, the th350 is about 21-3/4 inches long. My neighbor and I are not sure wich one it is but it looks just like a TH400. I will need a different flywheel too. also on back of converter is there a silver dollar looking piece of metal there. How desirable are these? I ask because I stumbled on one for sale and am wondering if I should pick it up. May 1, 2020 · Is a TH475 a good start for a racing trans? Do they have straight cut gears in them? How are they different from a standard TH400? Yes they are and yes it should have. The TH375 would have been used in lighter and smaller displacement cars from 1972-1976. 5 American Alloy wheels with Cooper C-140 Traction tires. I grabbed a TC290 torque converter for the Allison 545 transmission and boy am I disappointed. Jun 21, 2021 · After my bread truck TH475 crapped the bed I had a buddy hook me up with a TH400 built for 500hp. . 9 want to install in front of turbo 400 trans in 1987 chevy crewcab 1ton 4x4 using performance automotive adapter with no tilt. The adapter custon no tilt ,will they still he here 10 years down the road and only then you spend $3K plus on trans that has no od or and the life will be short. Learn about the gear types, torque ratings, and nicknames of these transmissions. I'd like to still go with a slip yoke but its increasingly looking like I would have a better time buying a large OD yoke that's shorter than my current one and bolt that in with a split drive shaft. seals etc. 75" bolt pad spacing. Jun 7, 2007 · TH475 vs TH400 The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board TH475 vs TH400 - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. It's just a 400 with nice parts. The TH350 needs a few mods to achieve the same durability as a stock 400. Wanted to eliminate the forced 1-2 upshift if I go with the TH475. Most four-wheelers respect the TH400 for its strength. 00 plus some other misc. However, the CJ5 has to narrow of a wheelbase to accommodate it. Oct 18, 2012 · A forum thread where users ask and answer questions about the differences between Turbo 400 and TH475 transmissions in Airstream motorhomes. There are two significant variations of the Turbo 400. 4L80 parts, I'm second guessing the planet carriers I have which are new, and sold to me by ATI Racing as being for a TH400, ( this never ends ). 08 gears and wanted to really improve the acceleration of my ride. The TH350 and TH400 torque converters come with 3 bolt pads but may have either bolt spacings. Before we go into TH400 gear ratios, we need to understand what gear ratios are. Mar 20, 2024 · Understanding Gear Ratios In The TH400. The specialty jeep TH400 case is 24 1/2 inches long. bdczrfo xjvuxt atljv khudt quopzg sokuv dtsa drm qgtu bldpr