Trans Mount

[FirebirdGT]

Who has actually changed out the trans mount? What issues did you have - if any?

[LETZRIDE]

I don’t recall having any issues when I swapped both of mine. Are you going with the stock rubber replacement or a poly mount?

I believe the poly mount required a straight cross brace be installed. At least I remember swapping mine and seem to recall it being due to going to the poly. The V8 guys have the straight brace.

Make sure you use a jack with a block of wood across the trans oil pan to support it.

[FirebirdGT]

Neither - 98+1LE bushing

I already have the straight trans brace and currently a 97 1LE bushing - 13 years old and 46K miles - looks crushed

Most likely the source of the "thud" noise.

And it's a manual trans.

[LETZRIDE]

Should be a straightforward swap then. And yes, a bad trans mount can cause thuds as well as shaking in your shifter

[ssms5411]

I went with the poly mount years ago. Still holding. Must have over 50k and 15 years on it. Can’t remember to well without looking at it but I think I used washers as spacers.

[FirebirdGT]

Should be a straightforward swap then. And yes, a bad trans mount can cause thuds as well as shaking in your shifter

That's the odd part - shifter doesn't shake/vibrate.

[LETZRIDE]

Have you checked your torque arm mount? Mine is a body mount but makes a helluva racket when the bolt was not torqued to spec.

If you have checked and retorqued all your suspension under the car and it still is making that sound, I would say swap the trans mount. It is cheap and can't hurt if everything else has been ruled out.

Did you get around to checking that U-joint?

[FirebirdGT]

The existing mount bushing is "squashed" which I know isn't correct - so I'm changing it regardless to my 98+ bushing - which is a different design and more solid.

[LETZRIDE]

That is a good starting point then. Just check torque on all your other bolts while under there and let us know how it goes

[zlexiss]

If the shifter pops up when you hit the gas in low gear like 1st, broken trans mount. I've replaced this about 4 times it's an easy job. I slotted my trans mount to fit the V8 mount, it's a solid rubber mount which I prefer. Need a few washers to space it though since its shorter.