Synchros or shifter alignment
Thread Starter
5th Gear
Joined: Sep 2024
Posts: 5
Likes: 0
From: San Antonio texas
Synchros or shifter alignment
So I want to buy this c5 z06 that’s ls3 swapped but the only issue is that it grinds going into 3rd and into 4th. I would like to know if y’all have experience with this and think that its synchros or actually an alignment issue. It does have a short shifter on it as well.
Administrator
Joined: Mar 2001
Posts: 368,389
Likes: 24,796
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Moved to C5 Tech.
Tech Contributor
Joined: Jan 2007
Posts: 19,472
Likes: 1,171
From: Dyer, IN
So I want to buy this c5 z06 that’s ls3 swapped but the only issue is that it grinds going into 3rd and into 4th. I would like to know if y’all have experience with this and think that its synchros or actually an alignment issue. It does have a short shifter on it as well.
Thread Starter
5th Gear
Joined: Sep 2024
Posts: 5
Likes: 0
From: San Antonio texas
Safety Car
Joined: Jan 2012
Posts: 3,956
Likes: 520
From: Da U.P.
Thread Starter
5th Gear
Joined: Sep 2024
Posts: 5
Likes: 0
From: San Antonio texas
sorry I’m new to these transmissions, what are the weak keys you’re referring to? From my understanding majority of the replies believe I should just swap the trans with another stock c5 z trans then, which is fine with me. I would like to just learn more of what y’all have for me as well.
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
Burning Brakes
Joined: Oct 1999
Posts: 1,236
Likes: 91
From: Pittsburgh,PA
Since It's both 3rd and 4th my guess would be It's not alignment.
If your Mechanically inclined and have the space/tools to do it pull the trans your self, then take it to a reputable shop to have it rebuilt. While the trans is out take a look at the clutch. And take the turque tube apart to make sure it in good shape.
If your Mechanically inclined and have the space/tools to do it pull the trans your self, then take it to a reputable shop to have it rebuilt. While the trans is out take a look at the clutch. And take the turque tube apart to make sure it in good shape.
Former Vendor
Joined: Sep 2017
Posts: 1,114
Likes: 259
From: Apple Valley CA
Typically when the alignment is off you can tell what the problem is. If the box is too far forwards or too far aft you loose 1,3,5 or 2,4,6; all the gears towards the front of the travel of the shifter or all of the gears towards the aft. If the stick is off center side to side you lost the ability to get into first or reverse; if it's too far towards the driver's side (when you tighten the bolt on the linkage) you loose first and visa versa. Super rare to have an issue with it grinding going into gears due to the shifter or the box.
One more vote to avoid other people's projects / swaps, I agree w the previous posts.
One more vote to avoid other people's projects / swaps, I agree w the previous posts.
Safety Car
Joined: Jan 2012
Posts: 3,956
Likes: 520
From: Da U.P.
Typically when the alignment is off you can tell what the problem is. If the box is too far forwards or too far aft you loose 1,3,5 or 2,4,6; all the gears towards the front of the travel of the shifter or all of the gears towards the aft. If the stick is off center side to side you lost the ability to get into first or reverse; if it's too far towards the driver's side (when you tighten the bolt on the linkage) you loose first and visa versa. Super rare to have an issue with it grinding going into gears due to the shifter or the box.
One more vote to avoid other people's projects / swaps, I agree w the previous posts.
One more vote to avoid other people's projects / swaps, I agree w the previous posts.