Ok, last night when I was driving my girl home in the RS, I got on the gas, and BOOM. Didnt know whats up but when i thought about i think its my tranny mount. I had to go mail a wheel out this morning and on the way it did the same thing. When i hit the gas it that same loud *** thud. ???Tranny mount???

 

Did it happen just as the gear was shifting? If so, that is the tranny mount, more than likely.

 

Yep, sounds like the mount. So now the car costs $325

 

most likely tranny mount... i go through them like comdoms

 

DJ, sounds like you have other problems because I have a poly mount and not have to change it that often. You might have an imbalance in the DS or something wrong witht he rear end that breaks the mounts that often

 

well, i know my motor mounts were BAD, and i just had them replaced... you think bad motor mounts would kill my tranny mount? i only break tranny mounts when i abuse the iroc on the street, lol, they usually last me a little more than 1500 miles before they break.

what should i check for to see if it's a problem with the rear end or the driveshaft?

 

Bad motor mounts can cause a car to go through tranny mounts as well....the vibration and excess flexing due to engine movement tears the rubber up quickly (assuming a stock rubber mount.)

Poly mounts are MUCH tougher, but some people just can't adjust to the increased drivetrain noise they create. Personally I like poly trans AND engine mounts.

 

So you changed the engine mounts? In that case, change the tranny mount and see how things go. You could unbolt the DS at the rear and take it out to a DS shop and they can tell you if the DS is bent or out of balance or even ok.

 

get solid motor and trans mounts. problem solved

 

Hey sorry for now reply, i was busy all weekend. Aklim, its thuds every time i hit the gas, i know its not the tranny but i wanted to make sure. I got a job at a chopper shop now so im gonna see if i can fab a solid mount for it. Or if its cheaper how much are they?

 

do NOT go solid if you are running rubber or poly engine mounts, after time, you will break the mount bolts or the tailshaft housing of the trans

 

Whoa! lol. Just curious but how does that happen. Looks like im going to have to do both solid trans and motor mounts then?

 

I'd do poly on all unless you want all the noise, harshness and vibration to transmit into your seat.

 

Sonds like ill be going all poly next weekend. And my rear end feels 'loose'. My iroc is 8 years older than my RS and feels WAY tighter. Im gonna try new shocks and poly bushings maybe a bigger sway bar. Any suggestions?

 

anyone run a stock trans mount with a hose clamp around it?