1kzt-e auto transmission problem

[Pinchers]

My transmission was long over due for a fluid change, before this it changed gear and ran fine.

I decided since i was changing the fluid i would do the accumulator and line pressure mod which invloved dropping the valve body and shimming out 2 of the accumulators.

It ended up that i had to change the valve body gasket but i got the work done and the transmission all boxed up.

Filled it up with dexron 11/111 multi grade semi synthetic trans fluid.

level correct with the engine running.

The problem that has come up is when accelerating from stop there is a vibration which feels like you are driving over a cobble road, it goes away at about 10/20mph and it is only in the 1st gear.

Anyone got any ideas what could be causing it?

[TonyN]

Anyone got any ideas what could be causing it?

I'd guess it's this...

I decided since i was changing the fluid i would do the accumulator and line pressure mod which invloved dropping the valve body and shimming out 2 of the accumulators.

I'd take the shims out again and see if it still does it, it must be something to do with what you've done, double check everything. Sounds like maybe a valve or ball bearing is bouncing open and shut due to pressure or something.