Just to let you know Apollo, you're not alone with the thump. To me, it feels like excessive lash in the final drive. If anyone has the answer, give it up.apollo said:99 sls
Well replace fr rt hydro mount and rear solid trans mount,some of the thump is gone but still thumps? ONLY at slow speeds stop and go traffic drive me nuts..IF you press the gas like and older 70s person its fine.
when you jump on the gas it will thump,IS there another hydro mount for the trans i dont see ? To make sound easy its like driving a manual trans in 1rnd gear and driving at10mph you step on the gas and it to much gear so its bumps
when hit gas.
hopes this helps with question..
I concur---alot of complaints at my dealership about this concern----I personally have called GM technical assistance on a few----they claim after the trans has alot of miles---65,000 or more there is a little wear/excessive lash. Trans can be rebuilt for peace of mind, but not necessary at this point as nothing is going wrong internally--just worn/broken-in gears. I believe it is in the final drive or chain assembly--The front engine mount tends to help alot (if it truly is broken) but not always the fix. If it was my car, I would just drive it. Hope I helped out on your question.......El Dobro said:Just to let you know Apollo, you're not alone with the thump. To me, it feels like excessive lash in the final drive. If anyone has the answer, give it up.