BigVic1994

Hello all.

I did a search and cannot find the exact symptoms I am having. Sorry if I missed a post.

First, some info:

-1994 LT1 coupe with automatic trans.
-52,622 original miles
-stock, owned since 1995


Anyway, my car did something strange yesterday. I am sitting at a light, in drive, foot on brake (duh) after taking a nice hour or so cruise. No issues (or noises) to this point. All of a sudden a "clunk" type sound occurs...kinda' like if you had just shifted from P or N to drive. RPM seemed to drop too. Put in N, OK.

Hmmm...

Light changes, put in D, take off. Car shifts flawlessly. Next light, same thing, maybe 2 "clunks"...uh-oh

BTW, Ambient temp. about 93 degrees...typical Florida. All temps OK, car running/shifting/idles fine otherwise.

Get home, check trans, fluid...about perfect, no smell, just below full/hot. Go through the gears slowly (P,N,D 3,2,1, etc.), seems fine.


Anybody have any thoughts on this...TIA.

94z07fx3

If RPMs came back to normal in short order, I would reckon that your clunk may have set off the knock sensors and timing was retarded.

The clunk sounds like a U-joint but that would only be the case if you heard/felt it when moving.

Is there any test drive in a parking lot, for example, that you can do to make the clunk happen at will?

Just a thought, you may want to get your eyes on the motor mounts.

BigVic1994

Thanks for the reply.

Basically, what happens (happened) is I am just sitting at a light, in drive, foot on brake....everything's fine for a few seconds...then "clunk". Sounds like trans. to me but I am no expert. Very weird.

This just started happening the other day. The car has been flawless. I will check it out more this weekend, but it never did this before.

Car is fine otherwise.

Elementaltoad

AC clutch kicking on?

BigVic1994

It's not that...it did it with the AC off yesterday. It is really strange