1969 4speed sometimes clunks and feels like it washes out when turning left from stop

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  #1  
Old 06-22-2012, 11:22 PM
Kamloops's Avatar
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Default 1969 4speed sometimes clunks and feels like it washes out when turning left from stop

Looking for help with my new SS.

Sometimes when turning left and after Ive let the clutch out in first gear and begin rounding the corner, the car bucks in the rear to the passenger side briefly. Its like a wash out feeling. Its not overly noisey and the u joints are all good. It happens maybe 10% of the time, usually in an intersection. I havent owned the car long and wonder how staraight it is... gulp.

The motor mounts, tranny mounts and cross members and rear springs and hangers seem to be all fine so I pulled the rear wheels and disc brakes off and didnt find any thing there either.

I'm considering pulling apart the muncie next to look at the clutch and bearings.

Before I get crazy I hope someone knows these symptoms and can help figure this out.

Suggestions?
 
  #2  
Old 06-22-2012, 11:34 PM
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I would look at your differential, especialy if you have a positrak. Sounds to me like somethimg is sticking back there.
 
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Old 06-22-2012, 11:46 PM
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Originally Posted by JustinA
I would look at your differential, especialy if you have a positrak. Sounds to me like somethimg is sticking back there.
Ya I have the 12 bolt posi
Not really sure what Id be looking for, but my dad hopefully remembers as he is helping me and has been in the car when its happened.

Are there any obvious checks or what should I be noticing once i pop off the cover?
 
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Old 06-26-2012, 07:58 PM
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Are you sure your posi isn't locking up. Try putting a bottle of limited slip lube in the rear end. Could be a cheap and easy fix.
 
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Old 06-26-2012, 10:44 PM
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Your clutches in the rearend are gummed up and snagging. Remove the diff cover and drain all the old worn out oil. Reinstall the cover and refill with gear oil (not synthetic) and a bottle of the additive. After that, take the car to an empty parking lot and do a bunch of easy figure 8's to get the oil worked into the clutches.
 
  #6  
Old 06-27-2012, 09:37 PM
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Great. I will give this a try.
Thanks
 
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