ZF Transmission issue
Burning Brakes
Joined: Apr 2005
Posts: 1,109
Likes: 2
Until I changed the clutch the sound began.
I guess it must be the little bronce bushing that goes in the flywheel, I believe it is called pilot bushing.
The throw out bearing should be fine, after all it spins all the time.
The question is still why when in neutral and sound goes away when depressing clutch pedal?
I guess it must be the little bronce bushing that goes in the flywheel, I believe it is called pilot bushing.
The throw out bearing should be fine, after all it spins all the time.
The question is still why when in neutral and sound goes away when depressing clutch pedal?
Thread Starter
Team Owner
Joined: Aug 1999
Posts: 24,017
Likes: 634
St. Jude Donor '10
thats why I believe its the throwout bearing, its spinning with no load as stated above. the guys who have aluminum flywheels get a lot of rattle from the throwout bearing when in neutral with the clutch out. Im pretty sure its the throwout bearing making that noise.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
You guys are reading too much into it. It doesn't rattle with the clutch pushed in because the input shaft and countershaft stop spinning. In neutral clutch out, the motor spins all this crap. Also the gears use roller bearings I believe, so they're lower friction than other transmissions you're used to. This probably contributes to the gear rattle, among other things. Higher friction would help dampen it out.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Dec 2004
Posts: 3,284
Likes: 51
From: Jacksonville, FL
St. Jude Donor '08 thru '26
May I...
...add this to the discussion.:o
Some of the zf6spd cars came from the factory with a needle bearing type pilot bearing as opposed to the more traditional "bronze bushing" type pilot bushing. In neutral, clutch pedal up those "bearings" made a whirring noise, sometimes even a noise to almost sound like a bad T/O.
I know in the ZR-1's there was a TSB about this as customers were bringing cars back under warr because of the noise. The TSB said to replace the pilot bearing with the bushing type pilot to satisfy the complaint. The TSB is over at the zr1netregistry site.
Tom
Some of the zf6spd cars came from the factory with a needle bearing type pilot bearing as opposed to the more traditional "bronze bushing" type pilot bushing. In neutral, clutch pedal up those "bearings" made a whirring noise, sometimes even a noise to almost sound like a bad T/O.
I know in the ZR-1's there was a TSB about this as customers were bringing cars back under warr because of the noise. The TSB said to replace the pilot bearing with the bushing type pilot to satisfy the complaint. The TSB is over at the zr1netregistry site.
Tom
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Some of the zf6spd cars came from the factory with a needle bearing type pilot bearing as opposed to the more traditional "bronze bushing" type pilot bushing. In neutral, clutch pedal up those "bearings" made a whirring noise, sometimes even a noise to almost sound like a bad T/O.
I call
. Pilot bearing does not rotate with car in neutral, clutch up. Whole clutch assembly spins together. Also I believe pilot needle bearing was used on all black tag units.
