Hard Parts

4L80E TH400 Heavy Duty Forward Clutch Hub

Sonnax heavy duty forward clutch hub 34322-01 is an ideal upgrade over OE hubs in GM 400, 425, 4L80-E and 4L85-E applications. It is made from 1045 steel forging and features a thicker cross-section for increased strength. Made from forged 1045...

4L80E TH400 Extreme Duty Forward Clutch Hub Kit

Sonnax extreme duty forward clutch hub kit 34322-02K is manufactured from forged 4140 steel and features nitrited and case-hardened splines to eliminate spline wear in extreme applications. Includes bearing between hub and direct clutch housing. The...

TH400 9" Output Shaft (32-Spline) Slip Yoke

This is a good used Turbo 400 output shaft with 32-splines and is the slip yoke style.  All our of TH400 transmission OEM used hard parts have been cleaned and inspected to ensure the parts you receive are ready to use in your rebuild.

TH400 4L80E Rear Planet Sun Gear - Slant Cut/Medium Lube Hole

This is a good used OEM rear planet sun gear for GM Turbo 400 and 4L80E automatic transmissions.  The sun gear in this listing is the slant cut style with medium lube hole.  Please verify this is the style you need before purchasing.

Sprag, Low Roller, 400 (1965-95), 4L80E (1990-E1995), AOD/AODE/4R70W/4R75W/4R70E/4R75E (Rear)(1980-Up), FMX,

This is a new high quality Borg Warner low roller sprag for GM Turbo 400 transmissions manufactured from 1965 to 1995.  

TH400 4L80E Direct Clutch Drum w/ 34-Element Sprag

TH400 Accumulator Piston Upgraded Aluminum w/ 3-Legs (1965-1998)

This is an upgraded aluminum style accumulator piston w/ 3-Legs for GM Turbo 400 transmissions manufactured from 1965 to 1998.

GM TH400 HD Intermediate Snap Ring Support by Adapt-A-Case

GM Turbo 400 HD Intermediate Snap Ring Support Made in the USA by Adapt-A-Case Gotta love it!  Buy the good clutches, a fancy trans-brake valve body, the HD sprags, all the stuff you can think of to make sure this one won't break.  A couple of...

TH400 4L80E Forward Hub

This is an OEM forward hub for GM Turbo 400 and 4L80E automatic transmission that has been cleaned and inspected by our technicans to ensure the forward hub you receive is ready to go into your TH400 or 4L80E transmission rebuild. 

TH400|4L80E Direct Clutch Hub - OEM

This is an OEM GM 4L80E and Turbo 400 direct clutch hub, which has been cleaned and inspected to ensure it is 100% ready to use in your transmission rebuild. 

GM Universal Dust Cover (Plastic)

Made in U.S.ANew Fitz-all by TeckPack  Universal Transmission dust cover.1 - Universal Dust Cover1 - Mounting HardwareFits over 90% of all GM rear wheel drive automatic transmissions, 1965 to 1995 car and light duty truck. Fits: 200C,...

TH400 4L80E Direct Drum Sprag - 34-Element BorgWarner

This is a NEW direct drum sprag for GM's Turbo 400 and 4L80E automatic transmissions made by Borg Warner.  There are 34-elements on this model sprag.    

TH400 Direct Clutch Drum

Remanufactured GM Turbo 400 Direct Clutch Drum.  

GM Universal Transmission Mount - RWD - 4L60E 700R4 4L80E TH350 TH400

GM Universal 2000 Transmission Mount This is a common mount found in many rear wheel drive General Motors applications.  Comes with new mounting bolt. 4L60E 700R4 4L80E TH350 TH400