Ok, here's what it's doing, when I am backing up while I am letting the clutch out it sort of jumps,(like you are goosing the throttle, or not letting out on the clutch steady) the more of a hill you are on or the more of a load you have the worse it is, with the clutch all the way out it is just fine. It doesn't do it in any forward gears just reverse. It isn't that big of a problem except when I am trying to back a trailer up nice and slow. Other people have suggested a motor or tranny mount or maybe a bad rear main seal leaking oil onto my clucth causing it not to grab right. It isn't an engine problem it's in the driveline somewhere, my rearend was just completely rebuilt about 6 months ago (carrier and r&p) so I hope that isn't it.
Just hoping somebody has some insight and has an idea what it might be or if they have had any problem like this.


Thanks
Chris

 

I have experienced the same behavior with my truck, and as you stated it only happens with a load on an incline. Just this weekend I was backing up my friend’s driveway with my trailer (3-4k) in tow. His driveway has a fair slope to it, and as I was backing up (even with the clutch petal fully out) the truck was "jumping" all over the place. Nothing terribly bad, but it struck me as being a little off color. Once the driveway leveled out, it went away.

Perhaps this is normal ? ?

 

Use low range

 

it sound llike hot spots on the flywheel and pressure plate but the curious part of it is that it don't do it forward?

 

sounds like sticky clutch syndrome to me... mine does it often if im not careful... Backing trailer uphill = low range. easier on everyone

 

I also thought it might be hot spots too, but since it doesn't do it forward I dismissed that idea. I have tried using low range, and in fact that is what I have been using, however it acts exactly the same as in high range, where it jumps while letting the pedal out, the only advantage to using low range is the lower speed when the clutch pedel is out, but it doesn't take care of the problem, just makes it easier to deal with.


Chris

 

Had that issue with mine a few years ago. While there was good lining on the clutch plate I replaced the disc, pressure plate, and the pilot bearing. Found that there were a few springs broken on the disc. Once replaced, all my problems went away and I am now 7 years down the road with since then.

Just a thought...

 

This symptom can be caused by a worn spline in the rear drive shaft. The torque on the axle changes the length of the driveshaft -- if the splines are worn, they can bind instead of slideing smoothly, causeing a jerking motion in the driveline . . .

Give the slip a good greasing, and see if it helps (cover the hole in the "freeze plug" behind the cross with your finger, and pump 'til it starts to come out the seal).

It is easier to do check on than the clutch, and would explain the behaviour with the clutch fully engaged.

 

I'll try and look at it in the next few days and grease it and see if that helps, sure would be alot cheaper than a clutch!!!


Thanks ya'll
Chris