Third Gear Grinding
10-18-2008, 11:48 PM
#1
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Third Gear Grinding Okay when to the track and made a couple of passes. Then I drove home I noticed when ever I shifted into third it grinds really bad. The only time I can get it into third is from a stop, but if I will go if I go through the grind, but I don't cause I know that would be a bad thing so I go 124. Are my sycros in third shot? Is this going to be expensive?
10-19-2008, 09:45 AM
#3
I have the exact same problem in my 97 LT1 T56 and I was told it was the syncros. Before I had the 3rd gear grinding problem it would pop out of 3rd gear while driving at slower speeds, so I may also have a bent shift fork. I'm looking at a rebuild at sixspeedsinc.
10-20-2008, 02:56 AM
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Yes, because a rebuild isnt just a rebuild, driving when you know you need one will just add more parts that you will need to buy because of excessive heat. So if you going to do a full on rebuild and replace everything is the only reason you should still drive it. otherwise it could just be 3-4 synchro
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10-20-2008, 03:37 PM
#8
My car does this when the car is cold going into both 3rd and 4th, but goes away after it warms up. This is only a few hundred miles after having my tranny rebuilt with all new bearings. I'm pretty pissed about having spent all that money and now having this issue.
10-23-2008, 11:20 AM
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Well its not the third gear synchro its the 3/4 synchro so that means if three is messed up it will still grind going into fourth, I just let the RPMs drop a little more and it usually doesn't grind 
11-09-2008, 11:19 AM
#14
Join the club. Mine is doing the same thing. I have been driving mine as well but go 1-2-4 with no issues. The only time my 4th grinds is if I am coasting and try to put it in 4th, other than that only grinds in 3rd but sometimes it will go in without too much of a fuss. I too have to drive my car right now so I have no option. Before this I was having some issues with the clutch sticking to the floor after a hard run. I will probably need to update the hydraulics as well. Hope the clutch is ok for now though. Good luck to all who have to deal with this ****.
08-09-2009, 12:27 AM
#15
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Same problem here after a night at the track. 4th works fine but 3rd grinds when I put it in. Only 3rd. Upshifting or downshifting. I found it dosn't grind if you "properly" doubble clutch. Is thisa synchro issue?
