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4L80E Center Support 99 Up


Mfg Retail: $134.95
Cost From Us: $91.88
You Save: $43.07
In Stock
Our Part #: 34630EC-U
Manufacturer: Cascade Product
free shipping
4L80E Center Support 1999 Up Style
Contains Lube Hole for Rear Case Cooler Fitting

These Will Typically Include the piston and return spring set ,
but this can be random - if you need those items be sure to request them.
We closely inspect and clean these as they are going into one of our trucks.

This design requires the use of .041" Spacer / Shim on the Rear of it
(1997 / 1998 Styles the support is that much taller overall )

This Will Fit All 1997 Up 4L80E Models  - Gm Rpo Option Code MT1
" When the spacer shim is installed to allow proper clearances "

This supportmay often be called or referrenced as the direct drum support also.

Failure Points / Where To Check Your Original

If your ring lands on this are bad ; its typical for the bore of your drum to be bad as well.
These Center Supports started to fail in the late 90's when the transmissions had very little miles on them.
The common issue has been the ring lands where the direct drum rides would always pit , and loose lube.
This at times would result in the direct drum actually becoming stuck / welded to the center support.
The second most common issue with these occured during dis-assembly.
Technicians would teardown the transmission for rebuild , and fail to remove the rear cooler fitting.
Once the problem has been realized the cooler line hole on the support is normally cracked out / damaged.

This Design has been on the market for over five year now and has been a very reliable aftermarket replacement part.
Technical Tip:
If doing Preliminary research before dis-assembly of yours pull the rear cooler line first !


Our Part #  34630EC-U

We would appreciate the opportunity to serve your transmission parts needs ! ! !

Cascade Transmission Parts , Inc.
All Rights Reserved ®



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