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driveline slip repair

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Old 04-13-2012, 01:32 AM
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driveline slip repair

I have noticed for a while now that when I take of from the lights or change from drive to reverse there is some slip in the driveline before it bites. Clay noticed it as well when he drove it so its time I fixed it. Easy job (1/2 hour) just couldn't be bothered getting around to it.

first thing to do is mark the joint and shaft so it goes back on the same spline



then if you are careful you can pry open the clamp so you can reuse it (gotta think of the environment)



then undo the four 8mm bolts on the uni joint, get a pry bar behind it to compress the spline and rest the shaft on something



as you can see mine was bone dry




grease up the spline - I put a bit to much on at first. You will notice when you try and put it back on the spline if there is to much



bolt her all up. Dont forget ya marks and no more slip

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Old 04-13-2012, 08:04 AM
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Nice tip. Thanks for sharing. I think my truck needs this. I can feel a slight vibration at about 80kph which sounds like a worn uni-joint or unbalanced tailshaft. I wouldn't be surprised if doing this will solve my problem.
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Old 04-13-2012, 03:00 PM
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Prob never had grease in the first place,just that useless blue crap,typical factory BS.
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Old 04-13-2012, 05:02 PM
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Originally Posted by SSSimon View Post
Nice tip. Thanks for sharing. I think my truck needs this. I can feel a slight vibration at about 80kph which sounds like a worn uni-joint or unbalanced tailshaft. I wouldn't be surprised if doing this will solve my problem.
This is for slackness in the driveline. If you have a vibration it could be you carrier bearing.
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Old 04-14-2012, 04:45 AM
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Thanks for another good tip there Brian. That makes a lot of sense and should also be an easy fix. I'll chase a new bearing and replace it on suspicion.
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Old 04-14-2012, 04:55 AM
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havent really looked at it but I have read that you should shim the carrier bearing for every inch of lift. Dont know what Bryan would do with he's airbag. If its up he would have to jump under and shim it up. When he puts it down out he goes again and takes em out. Man it would take a long time getting anywhere
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Old 04-14-2012, 05:08 AM
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Stick a little airbag in there too!
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Old 04-14-2012, 09:23 AM
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Cpt cunny funt and Cpt carbon tax on a roll ey..

U so funny.

Actually i was going too add to this comedy hour,BUT changed me mind.

GFYself.
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Old 04-16-2012, 06:39 PM
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Originally Posted by ChunderDownUnder View Post
havent really looked at it but I have read that you should shim the carrier bearing for every inch of lift.
If this needs to happen, you should notice it on takeoff, will vibrate quite a bit at low speeds.
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Old 04-24-2012, 05:24 AM
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It makes sense to shim it out so that the tail shaft is running as straight as possible from the tranny to the rear diff.

I should get a bit of creeper time in tomorrow for ANZAC day arvo.

Happy ANZAC day all!
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Old 04-26-2012, 03:37 AM
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I think the service manual calls for between 3-5 degrees from the first to the second tail shaft IIRC.

How did it look?
Happy ANZAC day to you too.
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Old 04-26-2012, 04:57 AM
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Thanks, I had a great ANZAC day!

Hunted down a few electrical gremlins with the truck's alarm system.

I had a big of a creep underneath to check out the drive shaft center bearing. With the truck raised about 3" there is a slight angle through the center uni-joint, but no more than the angle between the shaft and the diff center. In theory it looks possible to undo the 2 support bolts which protrude about an inch through the center bearing support bracket and put in some spacer material, like a steel piece with holes drilled in, it for the bolts to go through, the reattach the bearing bracket with the shaft being marginally straighter.

Has anyone done this sort of thing? Surely the guys running 8" lift must have done something like this...
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Old 04-26-2012, 05:15 AM
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I didn't realize your truck is lifted... yes, you will need to space it down.
Yes, it is designed to have spacers put in there, and I have done it on a few customers trucks. There are Ford official parts that are spacers... but no doubt $$$, just get a bit of 1/8" mild steel that is cut to size and drill 2 holes for the mounting bracket. Use 2 spacers if you need.

The guys running the crazy lifts need to both space it down and get their shafts lengthened (pun intended )
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Old 04-26-2012, 05:50 AM
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Will do. My truck is a 4WD with 3" blocks under the rear springs, with the short 1/2 inch thick spring removed (for comfort) and Firestone lift bags on 30psi, and a 2" leveling kit which consisted of a fairly long 4 leaf spring pack added to each side at the front.

No vibrations down low, but I get some sort of harmonic resonance at about 80kph which I suspect might be the rear tail shaft/s slightly out of balance. Not a huge issue as the noise is gone by 90kmh, but annoying enough in the 80 kph zones...



See: https://picasaweb.google.com/1077641...32428351644114
for picture of truck
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