What exactly does torque converter slip feel like? If I'm at low speed and hammer it (38psi boost ) I feel a bit of a shudder until I back off a bit and it seems to go away. If I'm doing about 35mph and get on it there is no shutter with the same amount of boost. I guess I should get that shift kit in this weekend, huh.

 

Well if I floor it, I'll get 45 PSI and I won't go anywhere. I'm guessing I'm slipping somewhere

 

The shudder sounds like "launch shudder", which is a common problem once you start bombing an auto truck. It's caused by poor driveline angles at the carrier bearing. To eliminate it all you have to do is space the carrier bearing down about 1/2". This just requires a few big washers and some longer bolts...other than that it's a piece of cake.

One definite sign of TC slippage is your RPM's not changing during a shift. When I hammer mine it will go right to 1900-2000RPM and stay there until the truck catches up (speed-wise). Then when it shifts the RPM's stay right at 1900-2000 (no drop like normal) and the whole process starts over again. You can kinda hear the RPM's and motor revving, but the truck takes a minute to catch up to speed.

 

Hey Justin. I should have thought about the launch shudder - I sell lift kits all day long for the newer diesels and it's one of the first things I have to problem solve. I guess it's because I've never experienced it for myself. I don't think that my RPMs increase without the truck moving much - guess I'll have to try it again.

 

Lol

With the RPM's, it's not very noticable from a dead stop on mine. 1st gear will still show some RPM movement. It's when I'm already moving in 2nd or 3rd and hammer it that it really shows.

Can't wait for the Hughes.

 

Mine feels like its lurching forward then backs off a little then repeats 3or4 times. I haven't done anything but pump tweaks, swiss the airbox and remove the muffler.