Whats going on with my transmission
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 20
Likes: 0
From: Iowa
Car: 91 Firebird
Engine: Rebuilt 305 new 4 barrel 650 holley
Transmission: T5
Whats going on with my transmission
My car grinds into 3rd and 4th only (not as bad at lower rpm's). But it would grind both up and down while shifting only into those gears. Others were perfectly fine. Whats going on here?
Supreme Member




Joined: Oct 2004
Posts: 1,076
Likes: 316
From: Missouri
Car: 1985 Z28
Engine: 305 LG4
Transmission: T5
Axle/Gears: 3.42
Re: Whats going on with my transmission
Sounds like the syncros are worn out. They are what syncronize both gears to the same speed so you can change gears without that grinding.
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 20
Likes: 0
From: Iowa
Car: 91 Firebird
Engine: Rebuilt 305 new 4 barrel 650 holley
Transmission: T5
Re: Whats going on with my transmission
Yep 3rd and 4th syncros are shot. Off to the junk yard to save a few bucks I guess.
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