Intermittent Transmission noise going into R

Drivetrain discussion including Transmission, Differential, Driveshaft, and related items.
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Joined: Sun Oct 18, 2015 4:31 pm

Intermittent Transmission noise going into R

Post by iefbr14 » Thu Nov 30, 2017 7:36 am

On occasion, when I move the transmission lever to R, I get a clunk noise, like 2 gears not quite meshing, and then finally coming together. It's not a horrendous noise, but a sharp ear listening for it will hear it.

I have the V6 version, no positraction.

My current dealer does not have a transmission tech; according to the dealer, other heavy line mechanics will attempt to diagnose the problem, and since they don't have a trans tech, the local GM zone manager has authorized crate exchanges of entire transmission assemblies.

My car has 18k miles on it, and right now, the noise is a curiosity; I'm not obsessed with the noise........yet.

However, I am not sure I want to give up my factory new (18k miles) trans for a crate rebuilt one, if they determine that to be the remedy.

Any advice?

Posts: 1856
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Intermittent Transmission noise going into R

Post by CrashTestDummy » Wed Dec 13, 2017 4:24 am

Are you sure you don’t have a soft motor mount, and something like the exhaust is hitting the body somewhere??
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

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