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  #1  
Old March 18th, 2011, 06:07 PM
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Tim Blanco
1994 Defender 90
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Burning clutch smell, bucking when taking off in first gear....

Finally had a nice day here in NY and was out and about most of the day in the D90. Ass was well but on my way home, I began to notice that taking off in first was not as smooth as normal...a lot more bucking than usual. Also, I am getting a constant smell of burning clutch.

I made it home, and took a look under the hood and under the truck- didn't see anything obviously wrong.

The Clutch fluid is not low either.

Everything else seems to be working fine- all other gears shift fine and there does not seem to be any loss of power that I can notice.

This smell has me worried.

Any thoughts? The previous owner had chanced the clutch/master less than 10k miles ago if that means anything.

Please help!

-Tim

------ Follow up post added March 18th, 2011 07:41 PM ------

Looks like I might have solved at least part of the problem. I recently changed the ignition wires. It appears that a couple popped off from the distributer. I reseated them and took a test drive and no more bucking. I don't think that burning clutch smell could be related to this but only time will tell.
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  #2  
Old March 18th, 2011, 09:42 PM
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Loic Fabro
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"Burning clutch" is a tricky smell.... Are you sure it smelled like a burning clutch or what that burning brake pad smell or even burning hand brake pad smell?
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  #3  
Old March 18th, 2011, 11:02 PM
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Tim Blanco
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It smelled like clutch to me but who knows. I did smell it under the hood as well but it didn't seem to happen until after I was driving for a while. I guess it could have been something else but who knows...the clutch was not slipping and other than the smell, there are no other symptoms.
Guess I need another long test drive to see if it happens again.
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Old March 19th, 2011, 05:43 PM
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Tim Blanco
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Anything I should be checking to diagnose this smell?
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  #5  
Old March 20th, 2011, 04:31 AM
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Do you have sufficient free play in the clutch pedal? As far as smell, I would also look for oil leaks on the exhaust or a sticking emergency brake.
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  #6  
Old March 20th, 2011, 07:53 AM
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Andrew J. Hutton
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Check all five brakes for binding first. Particularly the 5th one.
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  #7  
Old March 20th, 2011, 09:24 AM
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Tim Blanco
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Thanks for the tips. I'll check it all out any see if I can find anything.
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Old March 20th, 2011, 09:27 AM
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Andrew J. Hutton
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Just to spell it out just in case when I said 5th I mean the drum on the handbrake. You could have broken something inside and when you go to start if it bounces around it would add friction and that could cause issues and smell. You need to open it up to see though.
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  #9  
Old March 20th, 2011, 09:52 AM
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Tim Blanco
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right on...come to think of it, I have been hearing something rattling around when go over bumps..just thought that was normal for the D!
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  #10  
Old April 30th, 2011, 11:39 AM
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Tim Blanco
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I'm resurrecting this thread as I am still having this issue. It only seems to happen in 1st and reverse and only after driving for a while. Drive shafts/u-joints look good. Brakes are not hanging up. Could it be a motor mount issue? Why would it get worse when warm?
It drives and shifts fine for the first 30 mins or so of driving. After that, I'm bucking so much that i try not to use first gear too much. Thoughts?
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  #11  
Old April 30th, 2011, 12:49 PM
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Jamie Austin
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If it does it after "a while", i'd look at the transmission brake. if the shoes are badly adjusted then (when cold) all will seem fine... once it gets hot it'll expand and can case jerky driving.

When the jerkyness starts again, get underneath and check the temparature of the transmission brake drum. If it leaves your skin stuck to it, then it's binding... needs backing off a half a turn or so of the adjuster nut.
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  #12  
Old April 30th, 2011, 01:02 PM
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Tim Blanco
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Thanks. I will check it again but wouldn't I notice that kind of drag during all types of driving and not just taking off in first or in reverse like I do now?
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  #13  
Old April 30th, 2011, 03:24 PM
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I would flush the fluid!!!

If the PO did poor job or it got contaminated the brake/clutch fluid can absorb water.

When it's hot outside or when "stop and go", the clutch will start to behave erratic, ie hard to engage and disengage, bucking, etc. Tends to settle down and go away when "cold".

This is because the water starts to vaporize into air, and you will get air in the slave/lines.

Examine the fluid in the master cylinder for discoloration. Regardless I would flush it out the slave and replace all the fluid.

Given the fact it get's worse with warm weather and use and in only certain gears it is likely the fluid.

Hope that solves it!!!!!!!!! Make sure the followup up to see if it worked.
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  #14  
Old April 30th, 2011, 06:10 PM
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Tim Blanco
1994 Defender 90
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ok...will try the fluid next. I checked the transmission brake and that;s not the culprit.
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  #15  
Old April 30th, 2011, 11:52 PM
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John
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I just changed the MC and slave for the clutch so i've got fresh nightmares in case you need help figuring out how to flush and bleed.
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