Hey everyone - I'm back ... again ... looking for ideas on what would (could) cause a vibration when starting from a stop - it's worse when under a load, like pulling the trailer. The u-joints have been inspected and are good on the rear drive shaft (it is 4-wheel drive), had the center carrier bearing replaced. Since it only happens when starting from a stop, I am wondering if it's transmission related - ie torque converter (?) it shifts well and doesn't slip however. I've had great luck with all your respones - thanks in advance!

 

could be something in the tranny, but if it was it would feel more like a slip id think

my guees would be though, is axel wrap. i could be wrong, probably am, but that is deffinatly a possibilty. u might be needing a set of tration bars, or ladder bars.

good luck and hope ya figure it out

 

check and see if the harmonic balancer is loose