LT1 6 spd trans
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Intermediate
Joined: Sep 2013
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LT1 6 spd trans
I just recently purchased a 1992 coupe with a 6 speed trans. Replaced the clutch and now at certain rpm's (mostly under a load) I get a noise. Especially on highway at 60-70 in 6th gear. I suppose could be a bearing. does anyone know where to either a) buy a rebuilt trans, b) get it rebuilt (NE PA.) c) get a rebuild kit for the current tranny.
Any other suggestions are welcome.
Any other suggestions are welcome.
Safety Car
Joined: Jun 2006
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From: FL
Racer
Joined: Jun 2011
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Thread Starter
Intermediate
Joined: Sep 2013
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Had my mechanic do the work. I thought about the "loose" thing.
I took if back and had it checked. They are telling me tranny. Close friend so I trust him. Thank you for your response. I love this site. Everyone is always so helpful.
I took if back and had it checked. They are telling me tranny. Close friend so I trust him. Thank you for your response. I love this site. Everyone is always so helpful.
Pro
Joined: Aug 2004
Posts: 549
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From: Richmond VA
As your vette is a 92 you more likely have a black tag zf but, one thing you may also want to check is the flywheel. A dual mass flywheel is used to dampen and if bad it will make noise at low rpm and idle.
Contact Bill he knows ZF6 trans better than anyone I have found.
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Awesome thanks. Interesting on the flywheel as I just replaced that as well. I am gonna give Bill's number to my friend. I like the idea of a $50 kit. Just spent a ton and can only hope for that. This 92 has sat for seven years and when drained the tranny, it was like milk. Knew that was not good news.
Pro
Joined: Oct 2012
Posts: 672
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From: Cheltenham, England
Just a thought but Im guessing you wasn't getting the noise BEFORE you changed the clutch? sounds to me like something in the clutch or during install is to blame if thats the case, not the trans, what was the reason for changing the clutch,was it slipping?
Le Mans Master
Joined: Dec 2006
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From: H-Town Texas
When acclerating under lower rpms you will get some 'rattle' but it should dissipate as the rpms go up. However, you should not have it so much if cruising at constant speed, if you accelerate in 6th gear you'll get a little rattle.
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Milky fluid, did the car sit for a long time ?
I had a differential (all new) sit for a few yrs when I dumped it the new fluid looked as you described. Condensation over time
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I talked to my tech. He went single as you said. That looks to be the issue. He spoke to a couple of people that said pretty much the same. I did give him the http://www.zfdoc.com/ info this morning and he is going to speak with Bill as well. I really want to thank everyone for their help. It's been 25 years since I owned a vette and I lost touch. You all have helped enlighten me.
Team Owner
Joined: Sep 2003
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I talked to my tech. He went single as you said. That looks to be the issue. He spoke to a couple of people that said pretty much the same. I did give him the http://www.zfdoc.com/ info this morning and he is going to speak with Bill as well. I really want to thank everyone for their help. It's been 25 years since I owned a vette and I lost touch. You all have helped enlighten me.
You might "first" ask your tech what he used for "lubricant"? If there were any questions regarding the drain the first fill should have been changed very soon, a stretch would have been a few hundred miles and if it was "terrible" it should have been "run-in" on stands, drained then refilled with the appropriate lubricant before ever seeing the street. The "lubricant" is important and assuming the shop didn't advise you going in that the replacement was a "single-mass" there's an equally good chance they made a poor choice in the fill.
I'm not going to recommend a fill but choice is "important"!!
Way to much "rush to judgment" on the mention of rebuild required.
Last edited by WVZR-1; Nov 23, 2013 at 01:54 PM.
Thread Starter
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I will talk to my tech again today. I only have 100 +/- since replaced. I stopped driving when I heard the noise. I will make sure lube is changed again. Do you happen to know what is recommended after a changeover? I know factory is SAE 5w-30.
Team Owner
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I did meet an Amsoil rep this past summer and he was for sure a "good guy" and if I did decide to maybe give it a try he would be my go to.
I'm not trying to sell anything here but I do have an NOS ZF that would be a fit for your car but the T/O bearing guide would need changed from yours to it to use the new release bearing you've got now. I do have a "low mile" later '95 or '96 also. I'd have to check the tag to see which year. If you get to the point to where you actually consider removing it again you also want to confirm it's got the correct T/O bearing installed. There are two.
Have the shop check all of the attaching hardware for the C-beam, the pinion flange etc.
Last edited by WVZR-1; Nov 23, 2013 at 02:43 PM.