Product Description
Fits: Allison LCT1000 · 2001-UP Chevy Silverado HD / GMC Sierra HD
Adapt-A-Case main shaft support for Allison LCT1000 transmissions in 2001-UP Chevy Silverado HD and GMC Sierra HD trucks. It holds and preloads the main shaft during assembly. Made in the USA.
Specifications
| Years | 2001-up |
|---|---|
| Mounting | PTO mount, two bolts |
| Origin | USA |
Why it is needed
Before final assembly, the T-44587AC is installed at the PTO mount and held in place by two bolts. Once the rear half is assembled and the extension housing is bolted on, the transmission is rolled back over with the bell housing flange up.
Without preload, the main shaft can move during that roll-over and the P3 sun gear thrust bearing often falls out of place. At a minimum that means clearance problems and time spent disassembling. If it goes unnoticed, the bearing gets pinched and fails on the test run, taking costly hard parts with it.