NLalexx

Well i just got a built tranny but now it makes a wierd vibration after overdrive kicks in.. like around 45-55... i step on the gas a little not a lot and it jumps a bit then goes back to normal.. Seems like it goes back to 3rd gear then back to overdrive and when it does that it jumps a little my dashh vibrates ALOT shakes badly then goes back to normal.. only does it in that place i tried puttin it on 3rd at the same speed and nothing.. it was perfect.. so could it be the tranny maybe the Stall converter...??? ive been told it could be the motormounts.. could it be that too or transmission mount.. also when i Accelerate it spins an then starts jumping really really bad.. tried clamping the leafsprings and new shocks and still does it.. ... Thanks in advance.. looking foward for some advice

Isak81

I would check the transmission mount maybe you forgot to tighten it.
Did you put a new converter in? If you reused your old one there might
still be some crud left in there.

probuilder1

iTrader: (6)

Im just gonna take a guess here but it sounds like it is shaking when the tc locks up. I would make sure your converter bolts are tight. And for the jumping, that's wheel hop. Look into some traction bars. Just my .02

NLalexx

I actually dont know lol the guy just installed the new built tranny.. he put a Tbss Stall i had the i6 one but actually felt my truck lighter with the Tbss stall.. maybe the stall is fked up ?? or the mount?

NLalexx

yhea when overdrive kicks in yhea when the rpms just go down a lot like at 45-50 some.. the tranny guy is going to check it out wednsday and also change the stall to another one.. maybe its that.. could motor mounts Cause that in any way?