OB Clutch Woes
Thread Starter
Racer
Joined: Mar 2005
Posts: 459
Likes: 17
From: Surrey, B.C.
OB Clutch Woes
My '82 with 100,000 miles and I think 2nd Clutch(many years ago) is starting to give me some grief. When cold it is very difficult to put the transmission in gear, I'll sit there pumping the clutch and then be able to put it into third or fourth before finally getting it into first. The strange part is that after about 5 minutes it shifts and acts like new??!! I'm thinking the splines are sticking(lack of lube) Any insights?? 
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From: Up Nort
Thread Starter
Racer
Joined: Mar 2005
Posts: 459
Likes: 17
From: Surrey, B.C.
Hacker OMG,
That was an informative thread!!! Thank you so much, I now fully understand how this DD Clutch system works. I was on the right track but having it described in so many different ways by so many different people is invaluable!!! I love Rennlist!!!!!!!!!!
So am I correct that in the end your problem turned out to be a broken release bearing? Did it make any noise or tell tale signs or was simply discovered during disassembly?
Andre,
The Master Cylinder is 1 year old (what a job) and the hydraulic system has been power bled many many times and is working correctly. 17mm travel as per specs.
That was an informative thread!!! Thank you so much, I now fully understand how this DD Clutch system works. I was on the right track but having it described in so many different ways by so many different people is invaluable!!! I love Rennlist!!!!!!!!!!
So am I correct that in the end your problem turned out to be a broken release bearing? Did it make any noise or tell tale signs or was simply discovered during disassembly?
Andre,
The Master Cylinder is 1 year old (what a job) and the hydraulic system has been power bled many many times and is working correctly. 17mm travel as per specs.
Instructor
Joined: Nov 2006
Posts: 241
Likes: 0
From: Federal Way, WA
Good stuff.
While on topic, my 82 does similar things. On cold start up and only cold start up, trying to put the car in reverse will grind teeth. Most of the time I kinda have to force it in and afterwords the problem doesn't occur. Could this be the slave?
Also, how much rwhp will the stock clutch hold before slipping?
Thanks!
While on topic, my 82 does similar things. On cold start up and only cold start up, trying to put the car in reverse will grind teeth. Most of the time I kinda have to force it in and afterwords the problem doesn't occur. Could this be the slave?
Also, how much rwhp will the stock clutch hold before slipping?
Thanks!
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From: Up Nort
Originally Posted by Walt L
So am I correct that in the end your problem turned out to be a broken release bearing? Did it make any noise or tell tale signs or was simply discovered during disassembly?
What was happening is, that retaining ring was probably getting stuck sideways not allowing the clutch to fully come apart. It wasn't really rattling around, at least not enough to casue any abnormal noise.
I'm not sure how common this failure is, but holy cow, I replaced everything else down there.
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Rennlist Member
Joined: Jan 2004
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From: Boulder Creek, CA
To avoid issues shifting the trans when cold, I start it in gear with the clutch in. I can get it to go between 1st & reverse well enough, once I'm down the road a block or two it starts shifting OK.
Thread Starter
Racer
Joined: Mar 2005
Posts: 459
Likes: 17
From: Surrey, B.C.
I'm still curious as to how the cold seems to cause a problem. Mine is pretty much a standard occurance now so I have a feeling that I'll be getting intimate knowledge of my clutch sooner rather than later.
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Joined: Aug 2001
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From: Up Nort
Originally Posted by SharkSkin
To avoid issues shifting the trans when cold, I start it in gear with the clutch in. I can get it to go between 1st & reverse well enough, once I'm down the road a block or two it starts shifting OK.
Originally Posted by Walt L
Hacker,
Did you replace the intermediate shaft as well( that last time) or just the bearing, and is all well since?
Did you replace the intermediate shaft as well( that last time) or just the bearing, and is all well since?
Actually, it came down to the pressure plate and the intermediate disc. I had a known good (used) of each to try. I also had a new release bearing. I figured why not put a new one on since I needed to mount one on the test pressure plate anyway.
I never did test the used pressure plate. Once I took off the used release bearing it was obvious something was broken with the bearing.
So I ended up putting the old intermediate disc & pressure plate back in - shifts perfect now.
If you cannot put the car into reverse without grinding - fix the clutch or you are destroying the synchros. I do understand that going from 1st to reverse (or any other forward gear) you need to allow a 1-2 seconds for the trans to stop spinning before trying reverse.
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Joined: Jan 2004
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From: Boulder Creek, CA
Originally Posted by Hacker-Pschorr
Class - here we have a text book example showing why the early cars end up with bad synchros in the transmission.