I have a '94 SSEi (4T60-HD with cooler) and I want to improve shift. What you recommand: B&M Electronic Shift Improver or Transgo Shift Kit. Tell me if you have other recommandation.

Everyone who has done a 4t60-HD performance transmission here will tell you the trans go shift kit is the way to go. SSeimatt93 willren and morthel have all done a rebuild with the trans go kit.

The transgo kit must be installed with a rebuild. The B&M Electronic Shift Improver does the same thing as an adjustible transmission modulator which is less than half the cost.
If your not planning on rebuilding your trans and want to firm up your shifts a little bit go with the adjustible trans modulator. You can get it at most auto parts stores.
The Transgo kit is the best option though.

Read this topic:

http://www.bonnevilleclub.com/forum/...ic.php?t=53285

damn u beat me too it lol

is there anything like this for the 4T65E-HD ?
and does it actually extend the life of the transmission, as well as making shifts firmer all without a rebuild?

www.intense-racing.com

there are around 60 products on the transaxle page... am i looking for something specific? they all looked like internal components or rebuilds.

TSP-651 is what you need.

ah, just skimmed at first.
thank you kindly!