Prothane poly motormounts

[Crimson Sin]

sounds like it wasn't installed right then or else your motor mounts were shot... mine hardly vibrates at all...

I did the Motor Mounts first. So they were new. Dunno Spaz, anything is possible.. but its sorta hard to fudge installation of the T mount. But Anything is possible... I still have a small shake in drive and the Prothane's have been in for 10 k mi's or more.. I replaced the T mount with new Factory and Instantly the rhythmic wham wham wham in drive at about 55-75 disappeared. Was is the T-mount.. Dunno I never put the Prothane one back in. Guess I should have We could have answered that question.

[Spaz]

I did the Motor Mounts first. So they were new. Dunno Spaz, anything is possible.. but its sorta hard to fudge installation of the T mount. But Anything is possible... I still have a small shake in drive and the Prothane's have been in for 10 k mi's or more.. I replaced the T mount with new Factory and Instantly the rhythmic wham wham wham in drive at about 55-75 disappeared. Was is the T-mount.. Dunno I never put the Prothane one back in. Guess I should have We could have answered that question.

could be a lot of things... wheels out of alignment... drive shaft might need to be balanced... TQ arm could be cracked (if it's a stocker)... shocks could be shot... etc etc...

[Crimson Sin]

could be a lot of things... wheels out of alignment... drive shaft might need to be balanced... TQ arm could be cracked (if it's a stocker)... shocks could be shot... etc etc...

Hmm I will check the torque arm. Everything else is new and recent. I ran a Goodyear facility ( when the work was done. New Shocks and springs ( did the 1LE springs when I did the shocks.) Drive shaft is new cause my old one made a .. sproing.. sound when I hit the gas. That's OEM Chevy ( cause I am fussy) and yes it's aluminum. Torque arm... I never did check that.
Thanks for the thought. I will check that next time I rack the car.

[Hot Black Trans-Am]

I'm running mid 10's on the stock 130k miles motor and tranny mounts. I have a set of poly mounts sitting in the garage (I've had them for 6+ months).

If your not going to use them feel free to ship them to me.

[Crimson Sin]

I did a bit of Research on this when I was installing. And a few of the guys on LS1Tech.
Most said to install just the motor mounts an leave the tranny mount out. This was from the CCC guys ( run the 1/4s for points etc Ford Vs Chevy crew ) So I thought they knew what they were talkin about. I did do the tunnel brace with loop so I figured the drive line was re-inforced with that, the SFCs ( weld ins) and STB.

[Pete Rock98]

Good mod,like the way drive train feels when I let the clutch out.

[lonewolf37]

A little vibration increase, but it smooths over time. Worth it if you have the engine out. I would not want to do this unless I was removing the engine for some other purpose. Just one more thing to do during the winter.