This is for an 03 G35 coupe, but I figure tranny issues should be fairly universal between G and Z..

As the title of this thread suggests, I just had a new tranny installed at 38k miles. (part # 32010 CD008)

I got the car back yesterday, and everything seemed ok. Once it was warmed up though, I started noticing this nasty noise in first gear. I'm sure we're all familiar with the typical clutch noise, the sound of rocks rolling around when it's idling. Well this is a much louder, much more exaggerated sound, though similar. It only seems to happen between 2k-4k when accelerating in first gear...

Also, there seems to be a HUGE loss in power across the entire RPM range.

The service writer of course ccouldnt hear the noise, and claims the car pulls fine. But the bottom line is, I know my car, and its slower and noisier than before the tranny swap.

Any ideas how to proceed? Or what the problem may be?

 

Hmm..when I installed my series8 tranny in my car, I didnt notice any change in noise, power or anything else. Did they swap clutches or anything for you at the same time?

 

I believe the service writer said the tranny includes a new pressure plate, but beyond that I dont think there were any other changes.

 

Bumping out of desperation.

Surely someone has heard of something similar? Or has a vague idea what could cause such a problem?

 

Update:

Met with the tech that installed the tranny. He claims not to hear the noise either. Yet when I drove into the parking garage at work this morning, co-workers asked if they swapped the engine for a diesel while they were replacing the tranny. It sounds like a F'in diesel MAC truck driving down the road.

 

man, this is why i am so hesitant to "ask/get" a new tranny under warranty. i have an early 03 production touring with the originial tranny.

- mine doesnt grind except for a slightly notchy feeling goin into 5th gear
- rock gargling noise in neutral with the clutch out
- whiny 1st gear

and just few days ago, pushing in the clutch makes a squeeky noise. i love my car.

 

You're certain it only happens in first gear?

If not.. it could be that your rear axel needs to be retorqued. A lot of people have had that issue and there is a TSB for it.... typically it sounds like chains being dragged on the ground or rocks in a can.

Rocks in a can sounds can also be caused by any bad bearing in your engine or tranny or any of several engine components such as in the alternator or PS Pump, and often times in an idler pulley(especially with cars that are subject to driving through a lot of big puddles or very damp areas... or anyone with a 4x4 who does water-crossings).