Thread: '99 GTP 4T65E-HD seems to have died.

Originally Posted by Jevik

The only big difference between the Hd and regular is the differential and the passenger side cover. So it's not likely to be turned into a regular 4t65e. I would sooner get the TEP rebuilt tranny for $1375 shipped and have someone drop it in when it arrives than pay out 2k for a rebuild. It may end up costing the same, but with TEP you know it's done right...

The differences between the 4t65e (M15) and 4t65e-HD (MN7) also include a stronger input sun gear and roller bearings on the diff, in addition to the larger diff and passenger-side cover. I also believe the chain drive is also different, which give you the different final drive. The shop the car is currently at, the dude seems to have no clue of the difference between the two. This casual indifference to what gets installed has burned me before... when I specified that I didn't want a new rear installed unless it had an LSD... and that I wanted the old rear back. I show up and my old rear is in the trash and the car is a one legger... because most people don't give a crap.

TEP is an option, I suppose. It took a while, but I finally found the $1375 on their website. Does this really have no core charge? While its a shipping nightmare, I'd love to keep the original transmission.

BKNJ