GM Remove the front servo piston, washer, and servo pin from the front servo bore, followed by the spring retainer and spring. See Figures 2-38 and 2-39. Two different front servo assemblies are used in the TH400. This is covered in detail in the appropriate section of this manual. Step 1: Inspect Parts (Critical Inspection) The output shaft and lower planetary assemblies and related hardware are shown here. Remove the low planetary carrier from the output shaft carrier assembly to inspect the pinions, Torrington bearings, and replace the bushing. Step 2: Remove Snap Ring
TH400, 3L80 General Motors Transmissions
The Turbo 400 transmission parts diagram is a visual representation of the internal components of the transmission. It provides a detailed breakdown of each part, including their names and how they are interconnected. Identification The TH400 and Jeeps have quite a history together. This list is of the Jeep powertrains that had this excellent transmission. The TH400 came in 2wd or 4wd Jeeps, coupled either to the popular Model 20 (or Model 21, in a few rare cases) transfer case or the Quadra-Trac, the latter being an option from 1973 to 1979. The General Motors TH400 transmission is a strong unit and came in several configurations, including two bellhousing bolt patterns and several different overall lengths. Shown here is a Buick, Oldsmobile, and Pontiac (BOP) unit with a short tailshaft. Install the center support bolt finger tight, then install the beveled case ring with the gap at the 9 o'clock position. Then using a screwdriver through one of the feed holes in the VB area, force the center support in a counteclockwise direction and tighten the center support bolt. Jul 26, 2006. #4.
Gm 4l80e Transmission Parts Identification
The Chevy Turbo 400 transmission, also known as the TH400, is a three-speed automatic transmission that was widely used in Chevrolet vehicles from the 1960s to the 1980s. This transmission was known for its durability and strength, making it a popular choice for high-performance and heavy-duty applications. 1 T-400 transmission rebuild tech. 1.1 Shift shaft seal replace; 1.2 Main case bushing replacement;. Recommended is an ATSG rebuild manual, and How to Rebuild & Modify GM Turbo 400 Transmissions (S-A Design Workbench Series), and this post for those new to transmissions.. In the diagram above (1969 Camaro), the power is taken at the wiper. General Motors TH400 3 SPEED AC RWD Revision 11/2018 TURBO AC HYDRAMATIC 400 (3L80, M-40) 3 SPEED RWD FRICTION PLATES Cont. 250B Forward Clutch (Raybestos) (150mm OD x 1.57mm x 42T) .. 64-98 250B Forward Clutch (Smooth) (Alto) 250B (150mm OD x 2.00mm x 42T) .. 64-98 5 TH400.FRP31 5 TH400.FRP51 Turbo 400 Transbrake Instructions. Reverse pattern shift - P-R-N-1-2-3. *The Transbrake operates with the button held down in 1st gear only. *In order to use reverse, you must hold down the transbrake button while shifter is in the neutral position. This is how all Turbo 400 Pro Brakes operate. Holding the t/b button down allows for the
turbo 350 diagram
This Repair Manual contains general description and overhaul procedures necessary to repair, overhaul or service the Turbo Hydra-Matic 400 transmission, and is found in both passenger cars and trucks. TH-400 transmissions are three-speed automatics, with a 2.48:1 first gear. Reverse gear is 2.08:1 and third gear is an even 1 to 1. Turbo 400s use three tail shaft lengths; the most preferred units for a GM swap would have the short 4-inch tail shaft. The TH-400 was strong enough to be used on 4WD vehicles as well, and was original equipment on.
General Motors has produced a myriad of versions of its fabled automatic transmissions over the years, although three models make up the bulk of pre-ECM GM slushboxes; the Powerglide, the Turbo-Hydramatic 350 (Turbo 350), and the Turbo-Hydramatic 400 (Turbo 400). The Turbo 400 transmission was a 3 speed automatic transmission developed by General Motors. This was one of General Motors editions of the Hydramatic transmission series. This transmission is known more commonly by the name TH400, although it did receive another name change in the late 80s, adopting the name 3L80.
Turbo 400 Transmission (TH400) Specs and Parts HCDMAG
Use this diagram to help you. Outer Case Material: Aluminum, fused with bellhousing Controlled by Computer: No It's controlled by a vacuum module and kickdown switch Weight: Roughly 150 pounds with ATF 3L80 The GM TH400 transmission is a three-speed automatic transmission that was longitudinally positioned behind the engine. This placement is aimed at providing the best power ratio and durability for rear-wheel drive.
