Lost 5th and 6th gear
Thread Starter
Instructor
Joined: Aug 2000
Posts: 121
Likes: 2
From: Seabrook, TX, USA TX
Lost 5th and 6th gear
I was driving 02 Z06 on the highway in 6th gear and the engine RPM increased liked it had popped out of gear. I checked that it was still in gear, it was, then checked 5th and the same thing. No grinding or noise at all. All the other gears to include reverse work fine. I checked the shifter alignment and it was fine. 5th and 6th gears are separate gears on the shaft so I wouldn't think they would both fail at once. I am thinking it must be a problem with a bent shift fork or the fork pads. Leading up to the problem I had noticed the rear of the car would wobble sometimes when I upshifted to 6th at low RPM under power. I am guessing I am going to have to pull the xmsn but maybe somebody knows a quick fix?
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
No quick fix. It is the transmission. I had something similar happen earlier this year. Wound up having the mainshaft replaced along with 5th & 6th gears, synchros etc. Wasn't cheap but working fine now.
Thread Starter
Instructor
Joined: Aug 2000
Posts: 121
Likes: 2
From: Seabrook, TX, USA TX
Yea I was afraid it would be. Did the gears come off the shaft or what? Probably cheaper to buy a used one?
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
In my case, the teeth on the shaft wore out. The bottle gears remained on the shaft.
Last edited by 3sACROWD; Jul 27, 2016 at 08:36 AM.
Thread Starter
Instructor
Joined: Aug 2000
Posts: 121
Likes: 2
From: Seabrook, TX, USA TX
Did it make any noise when you put it into 5th or 6th gear, or driving in any other gear? Mine doesn't and I would think that it would.
Supporting Vendor
Joined: Apr 2011
Posts: 3,333
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From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
I was driving 02 Z06 on the highway in 6th gear and the engine RPM increased liked it had popped out of gear. I checked that it was still in gear, it was, then checked 5th and the same thing. No grinding or noise at all. All the other gears to include reverse work fine. I checked the shifter alignment and it was fine. 5th and 6th gears are separate gears on the shaft so I wouldn't think they would both fail at once. I am thinking it must be a problem with a bent shift fork or the fork pads. Leading up to the problem I had noticed the rear of the car would wobble sometimes when I upshifted to 6th at low RPM under power. I am guessing I am going to have to pull the xmsn but maybe somebody knows a quick fix?
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Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
If you still have reverse gear, its your 5-6 cluster gear splines are gone along with the splines on the main shaft where that cluster sits. 5th and 6th DRIVEN gears are made on the same cluster. At a very minimum, you'll need a main shaft and 5-6 cluster gear.
