very stupid and illegal
[Z06] Trans Problems Please help
Thread Starter
Racer
Joined: Oct 2006
Posts: 385
Likes: 0
From: CA
Trans Problems Please help
Alright so here is the rundown, I was racing my friends Murcielgo (spell check) and as I hit third gear it made a grinding noise, still went into gear and came out no problem for the fourth gear shift. After the race third gear now grinds very badly unless I double clutch the shift and match the rpms. What do you guys think would be causing this? All other shifts and gears are fine and I have a C6 Z06 shifter installed. Do you think it is a syncro?maybe the fluid being low? or possibly the shifter alignment being off? or something in the linkage? I am not very familiar with the trans setup on the vettes as this is my first one, so any ideas or help would be great.
Thread Starter
Racer
Joined: Oct 2006
Posts: 385
Likes: 0
From: CA
I was in second at about 4,000 rpms and he was still in first since the gearing is crazy in that car, he took the hit and through fourth I was about 3 cars back, I make 390/380.
Now any advice with the trans?
Now any advice with the trans?
Instructor
Joined: Feb 2009
Posts: 248
Likes: 0
From: Pine Beach NJ
Safety Car
Joined: Nov 2000
Posts: 4,549
Likes: 30
From: Shenandoah Valley Virginia
It could also be a bent shift fork. Any way you look at it you are into a tranny rebuild. There are several forum vendors that have HD forks and syncros as replacement items. Common costly problem.
Melting Slicks
Joined: Dec 2006
Posts: 2,186
Likes: 2
From: Woodinville WA
Definitely broken synchro key or keys. These trannies are very unforgiving for bad shifts. You will eventually be stuck in gear if you continue to drive it. Upgrade to billet keys, steel 3-4 fork, bronze pads etc. when you get it rebuilt.
Have the shop save a coulple of the OEM stamped keys for you, and you will be amazed that GM would have put something so fragile looking in a "factory race car." They look like a part that belongs in a child's Tonka toy.
Have the shop save a coulple of the OEM stamped keys for you, and you will be amazed that GM would have put something so fragile looking in a "factory race car." They look like a part that belongs in a child's Tonka toy.
Last edited by ctusser; Jun 3, 2009 at 12:40 AM.
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Thread Starter
Racer
Joined: Oct 2006
Posts: 385
Likes: 0
From: CA
Definitely broken synchro key or keys. These trannies are very unforgiving for bad shifts. You will eventually be stuck in gear if you continue to drive it. Upgrade to billet keys, steel 3-4 fork, bronze pads etc. when you get it rebuilt.
Have the shop save a coulple of the OEM stamped keys for you, and you will be amazed that GM would have put something so fragile looking in a "factory race car." They look like a part that belongs in a child's Tonka toy.
Have the shop save a coulple of the OEM stamped keys for you, and you will be amazed that GM would have put something so fragile looking in a "factory race car." They look like a part that belongs in a child's Tonka toy.
Melting Slicks
Joined: Dec 2006
Posts: 2,186
Likes: 2
From: Woodinville WA
http://www.thegearbox.org/home.html
Instructor
Joined: Sep 2006
Posts: 189
Likes: 0
trans
trans rebuild 460 for the kit all fibers and berrings if it is poping out of 3rd or forth u need the blocking ring kit 598 from the gear box .also and most likely need the sycronizer MS but who cares and a 3/4 steal shift fork and if u have a 01 or newer vett u wont need billet keys but u can put a new set in if u want and dont forget abouut bronze pads u can do this on a bench that has a 6 in hole in it in about 2 hrs once out u will need a gear puller set one small one med one large harber freight
is where i got mine 24$ it was easy and i have not had aney problems out of mine and i have over 500hp going to mine
is where i got mine 24$ it was easy and i have not had aney problems out of mine and i have over 500hp going to mine
Instructor
Joined: Dec 2007
Posts: 192
Likes: 1
From: Houston Tx
I just went through the same thing. It was syncros. I had after market warranty. Dealer put in new trans and it cost me 200 bucks. New trans didn't make it 250 miles and had syncro issues again. This time it was on GM. They opened it up and said it was a mess. I drove about 30 miles last night and it does not seem right still. Clutch has maybe 1500 miles on it. Seems to be realeasing fine. I am thinking maybe the pilot berring is not spinning free enough to let the syncros slow down the clutch disc. Good luck.
Team Owner
Joined: Jan 2007
Posts: 31,233
Likes: 201
From: Utah
trans rebuild 460 for the kit all fibers and berrings if it is poping out of 3rd or forth u need the blocking ring kit 598 from the gear box .also and most likely need the sycronizer MS but who cares and a 3/4 steal shift fork and if u have a 01 or newer vett u wont need billet keys but u can put a new set in if u want and dont forget abouut bronze pads u can do this on a bench that has a 6 in hole in it in about 2 hrs once out u will need a gear puller set one small one med one large harber freight
is where i got mine 24$ it was easy and i have not had aney problems out of mine and i have over 500hp going to mine
is where i got mine 24$ it was easy and i have not had aney problems out of mine and i have over 500hp going to mine
