Drive shaft slippage
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Drive shaft slippage
Hey all...having problems trying to solve my rear drive shaft that slips a little bit on take off.
hit the gas and I can tell that it’s rotating... but it takes a second or two to engage and move. Any advice is welcome.
search only turns up a bearing vibrating... thTs not it. Thanks.
2014 f350 6.2 4:30
hit the gas and I can tell that it’s rotating... but it takes a second or two to engage and move. Any advice is welcome.
search only turns up a bearing vibrating... thTs not it. Thanks.
2014 f350 6.2 4:30
Hotshot
Joined: Oct 2006
Posts: 10,154
Likes: 7,984
From: Texas
Hey all...having problems trying to solve my rear drive shaft that slips a little bit on take off.
hit the gas and I can tell that it’s rotating... but it takes a second or two to engage and move. Any advice is welcome.
search only turns up a bearing vibrating... thTs not it. Thanks.
2014 f350 6.2 4:30
hit the gas and I can tell that it’s rotating... but it takes a second or two to engage and move. Any advice is welcome.
search only turns up a bearing vibrating... thTs not it. Thanks.
2014 f350 6.2 4:30
Super Moderator
Joined: Apr 2004
Posts: 34,494
Likes: 2,809
A differential will do that, usually once and you have to be moving. If you have a toothless section of the ring gear, it's possible. The noise and jerking and eventual destruction of the axle would have happened by now.
As said above, the drive shaft really has no mechanism that could fail enough to slip. If it fails, it's done and on the ground, one end or the other.
Your transmission may be the culprit. Do you have any CEL showing?
You may wish to visit a Ford dealer, or someone who has the correct Ford code reader for transmissions, and have the codes checked.
Also, check the fluid for metal or other evidence of failure.
Good luck.
As said above, the drive shaft really has no mechanism that could fail enough to slip. If it fails, it's done and on the ground, one end or the other.
Your transmission may be the culprit. Do you have any CEL showing?
You may wish to visit a Ford dealer, or someone who has the correct Ford code reader for transmissions, and have the codes checked.
Also, check the fluid for metal or other evidence of failure.
Good luck.
4wd Low
Joined: Oct 2019
Posts: 10
Likes: 2
There is a phenomenon that Ford calls "driveshaft spline slip/bump". My 2012 f250 6.2 does it from time to time, it's a momentary issue just as you toe the throttle. What happens is the driveshaft changes length, just slightly, as the pinion angle changes and the splines slip by design. As a warranty at the dealer where I worked repair we used to remove and disassemble/lube the slip joint. As a practical fix I will go buy a pallet of wood pellet fuel ( 2,000 lbs.) and drive the truck energetically. This will exercise the spline and remove the slip/bump feeling.
Hope this might help.
Bill
Hope this might help.
Bill
Super Moderator
Joined: Apr 2004
Posts: 34,494
Likes: 2,809
IIRC this type of "bump" was happening with Toyota Tacoma's with a V6 and manual transmission. The rear axle starts to wind up, as they pretty much all do, but the splines don't want to slide. Finally they let go when the wind up and power overcome the static friction of the splines.
I noticed on mine they always included the driveshaft spline lube in every service. At least on paper. Mine was a 4 cylinder, so not much was happening wind up wise back there.
An easy fix with instant results. Good luck with it!
I noticed on mine they always included the driveshaft spline lube in every service. At least on paper. Mine was a 4 cylinder, so not much was happening wind up wise back there.
An easy fix with instant results. Good luck with it!
Logistics Pro
Joined: Dec 2003
Posts: 3,777
Likes: 863
From: Foothills of NC
Wouldn't it be possible to drill and tap, then install a grease fitting on the outer shell of the driveshaft at the slip joint? Over the road big trucks all had then before everything became "permanently greased".
The lack of grease fittings was claimed to be an EPA thing, but I think it's because it's cheaper and easier to build without fittings.
The lack of grease fittings was claimed to be an EPA thing, but I think it's because it's cheaper and easier to build without fittings.
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