yep, I'm back. Issue #2 with my 914/6. I just installed the 901, just rebuilt by the very excellent Dr. Evil. Drove it home and the gears work great. However, I am getting a small "whirring" noise while driving, that goes away completely when the clutch is engaged.

Any ideas on the cause of the noise? M

Thanks World.

Did you replace the throw out bearing?

If it is part of the gear stack, then it was either ok or replaced. Mike (Dr. Evil) did the rebuild. We just installed it back in the car.

I am thinking pinion depth is off a bit. Would that make sense to anyone? Would that cause a whirring sound when the car is rolling? Then goes quiet when. I push in the clutch?

I just hate that because it requires dropping the tranny again and draining expensive swepco oil and pulling the stack out. Just a lot of work after all of this already done.

nope...
not part of the gear stack

in the bell housing
a bearing to replace when you service the clutch

Prior to rebuilding the tranny I had the clutch replaced. About 10 miles ago, so it is a fresh install. I will check receipts. Thanks. But there was no noise after the clutch install.

Number 8 in the dia. Make sure when the clutch is not depressed- the bearing is not spinning.

Did you use a synthetic gear oil?

Yes, I agree that the TOB is the likeliest culprit. Lemme know.

Just to be clear, I did the stack rebuild only so pinion depth was not set by me


But, I still think it is the TOB most likely.

Swepco 201 ... No synthetics.

Ahhh, that is correct...which is why I was leaning to the pinion depth....if it could be messed up on my end...that is probably what happened. I will drive it a bit to see if it sets in and goes away.