4th gear grinding!!
Thread Starter
Instructor
Joined: Sep 2007
Posts: 101
Likes: 0
From: Niagara Region Ontario
4th gear grinding!!
I'll try and expalin this a clear as I can.
I have a issue where fourth gear grinds when I shift. No, its not my driving
1. Only happens during high RPM shifts, hard shifts. If I shift at high rpms but shift slow(let it hang in neutral for a split second)it may or may not do it.
2. Only fourth gear does this.
3. Tranny fluid has been changed. Made no difference.
4. Only happens on upshifts. I can downshift fine.
5. Even with the grinding, the transmission has never failed to go into gear. Ever. It drives perfectly fine.
FYI car is a 97 coupe. Roughly 64000 miles.
I have a issue where fourth gear grinds when I shift. No, its not my driving
1. Only happens during high RPM shifts, hard shifts. If I shift at high rpms but shift slow(let it hang in neutral for a split second)it may or may not do it.
2. Only fourth gear does this.
3. Tranny fluid has been changed. Made no difference.
4. Only happens on upshifts. I can downshift fine.
5. Even with the grinding, the transmission has never failed to go into gear. Ever. It drives perfectly fine.
FYI car is a 97 coupe. Roughly 64000 miles.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
You can just replace the bad parts in the trans. I decided to get a built trans to make it bullet proof with a Spec 3 Plus clutch and ECS adjustable master... It feels good to shift at highrpm with confidence again
Last edited by Ikester; May 29, 2010 at 12:36 AM.
Thread Starter
Instructor
Joined: Sep 2007
Posts: 101
Likes: 0
From: Niagara Region Ontario
The symtoms you are having is a 99% chance its bad syncros or paper blocker rings. I had the same exact thing on mine. Grinded 4th only at highrpms. My paper blocker rings were torn up which also led to worn syncs. Another good indication is that if you shift at low rpms fine, its bad syncs. Syncs are used for highrpm shifts to help the gears "syncronize" at high speed.
You can just replace the bad parts in the trans. I decided to get a built trans to make it bullet proof with a Spec 3 Plus clutch and ECS adjustable master... It feels good to shift at highrpm with confidence again
You can just replace the bad parts in the trans. I decided to get a built trans to make it bullet proof with a Spec 3 Plus clutch and ECS adjustable master... It feels good to shift at highrpm with confidence again
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Thread Starter
Instructor
Joined: Sep 2007
Posts: 101
Likes: 0
From: Niagara Region Ontario
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Good question, im not sure on that. I used synthetic on mine back in 2006 and that was the cause of my blocker rings being ruined. Back then the info i had was 97-99 had paper rings. That was incorrect. 2000 models had paper blockers also which is the year of my car.
Very expensive mistake on my part! i should have just used Dex III
Very expensive mistake on my part! i should have just used Dex III
Last edited by Ikester; May 29, 2010 at 09:19 PM.
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Thread Starter
Instructor
Joined: Sep 2007
Posts: 101
Likes: 0
From: Niagara Region Ontario
Good question, im not sure on that. I used synthetic on mine back in 2006 and that was the cause of my blocker rings being ruined. Back then the info i had was 97-99 had paper rings. That was incorrect. 2000 models had paper blockers also which is the year of my car.
Very expensive mistake on my part! i should have just used Dex III
Very expensive mistake on my part! i should have just used Dex III
From my research dex6 is a synthetic blend and is compatible with anything that used dex3 . Who knows i can't find a definite answer anywhere.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
FYI- any "synthetic" type fluid is not compatible with 97-2000 manual transmissions.
For starters Id switch back to Dex III before any more damage occurs.
Thread Starter
Instructor
Joined: Sep 2007
Posts: 101
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From: Niagara Region Ontario
Will do. Thanks.
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
I doubt it's a bent shift fork. I would say a blocking ring or just worn 3-4 synchro/engagement tooth. The 4th gear is the input shaft by the way. I know this is your daily driver but the weak parts inside do break over time. Look here why.
Use GM part # 88861800 for the fluid. The Dex III isn't produced anymore and the Dex VI isn't recommended for T56's.
Use GM part # 88861800 for the fluid. The Dex III isn't produced anymore and the Dex VI isn't recommended for T56's.
