Jeanyus

By reprograming your ECM (computer)

Ryguy

what would happen if I installed the hd2 kit without reducing or eliminating torque management? softer shifts??

Bish

You will still have a significant bog after the 1-2 shift. Torque management retards timing to significantly reduce power during shifting to reduce strain on the trans. Some have commented that it is worse with the shift kit and TM versus stock. Mine still bogged badly after the built trans until I reprogrammed the PCM and removed most of the TM.

Ryguy

ok thanks, i think i will put the 2nd servo in for now, should i use the one with or without the longer pin? what do you think about the 4th gear servo? should i do that also??

gonzo 6.2

iTrader: (8)

dont waste it on a 4th

Ryguy

i tow a 25ft trailer, still thikk the 4th srevo isn't worth it?? longer pin for 2nd???

Dirty Dave

If your pulling a 25ft trailer you should go do the complete hd2 shift kit. It does more than just improve performance. The .490 boost valve will give it better line rise. It also will improve tcc operation. It also adresses some of the quirks, like the 1-2 bump and double bump. There is also a junior kit that costs about half as much that we put in every 4l60 and 65 we build. In my trans i used a corvette servo $12 and a sonnex 4th servo $45. You will like the way it shifts at wot. It may chirp the tires in tow haul. At part throttle if you let off a little before it shifts in second it will feel a little weird. It will make your trans last longer though.

Project_VHO

iTrader: (1)

Do you still recommend a vette servo for the 4L65 as the first tranny mod? I know there are differences from 4L60 to the 65, but I have no idea what they are.