Hello all, I am new here and seeking advice. Over the past few months I have been battling some strange "shudder/vibration'. My truck is a 99' 4x4 tahoe with 5.7 and Auto tranny.

I have replaced the following:

Truck has 202K but completely rebuilt the engine at 169K
Both front CV alxe assemblies
Pulled the front differential and replaced carrier and axle shaft bearings...all were worn.

After this took to a mechanic that said the shudder I was still feeling was the torque convertor when going into overdrive.

Pulled tranny, t-case, etc...replaced torque convertor, service tranny with new filter, pan gasket and fluid.


It was running good for about two weeks and this weekend on the way home from out of town the shudder is back. Only thing different is it seems to be less intermident and more steady. It also doesnt stop when I shift from 4th down to 3rd now as the mechanic suggested trying before to see if it was the overdrive. It it steady now around 40-65 MPH but not 70mph plus.


Any advice would be greatly appreciated, Im about to loose my mind over this. Im worried maybe the tranny is going out.


Thanks so much for any help.

 

Im interested in replies here as well. I have an 04 Sub with same type of issue.. We notice it around 40-50 mph and unless Im dreaming it happens a lot when I let off the accelerator (coasting).