911 Rod

With my 86 you put a jack under the motor and see if it lifts before the car.
Is it the same with the TT?
Thanks
Rod

LexVan

Blip throttle, watch exhaust tips. Do they dip and rise excessively? That's an indication too.

up4speed

Both methods work great.
However, by the time that it's obvious that they are bad with these methods, they are probably completely toast and not just a little bad.
I recently replaced mine because I felt a little vibration under light throttle and idle. The mounts passed both of the above tests, but I changed them due to age. They definitely made a (slight) difference, but I mostly wasted my money, LOL. I can't say I regret it though. The replacements were cheap, the originals were old, and the new ones definitely make the car feel better. Now I know that I most likely bought myself another 14 years.
I replaced them with the OEM supplier ones from Pelican parts. I think they were around $90 and only took a few minutes to replace.

"02996ttx50

"slop" on lateral turns is usually enough of a clue for mm's and even trans mount to be suspect. once you swap them and you no longer have that disconnected feel, and there is no side to side palpable slop? you'll know they needed it.

if theyre as old as the car and no known upgrade to them ever occurred? change em! oem is.. ehhh.. while semi solids are awesome a good compromise resulting in a vastly improved "connectedness" to the car/trans etc that most city folk can handle. do NOT go "solid" unless car is track dedicated.

911 Rod

I'm actually trying to chase down a clunk in the rear end.
Has anyone been able to hear any noises from worn motor mounts?

stilov

I sort of wonder if that's my problem...

I have been fighting a side to side wobble type feeling coming from the rear. I thought it was alignment, so I had that done and it seemed to help a bit since my toe was out in the rear. It sort of feels like the car shifts weight back and forth while I am driving straight. Almost like every imperfection in the road is exaggerated, but its not a huge feeling.

PelicanParts.com

This article might be of some assistance with the mounts. Gives you an idea about how you can tell when they are bad. Images should be relevant as well besides figure #1.

-Luccia

Kevinmacd

911 Rod - check you trans mount they are known to go!. There is a company that sells hardened replacement bushings for the trans mount. see below link

http://www.function-first.com/products/996

911 Rod

Thanks Kevin.
At 140,000 I'm starting to think I should be doing some refreshing.

"02996ttx50

911 rod if you have 140k on the t-mount? it is toast for certain. the rubber crumbles. new mm's and a t mount will do you a world of good at 140k if you dont know they have ever been replaced

rmc1148

^agree they are gone buy those miles if original.