Transfer case oops
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Cross-Country
Joined: Mar 2015
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Transfer case oops
At some point during doing a bunch of work to my 79 I put the transfer case in 4H and didnt notice. Hubs were unlocked and had been driving it at highway speeds for a few days when I started hearing a rattle noise in 4th gear at around 40 mph plus. Put it up on jack stands on all four corners to have a friend gas it while I went under to pinpoint. The rattle is loudest near the front driveshaft. I only hear it in 4H and 4th gear, what damage did I do?
Thanks
Thanks
Senior User
Joined: May 2018
Posts: 117
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From: Strathalbyn, South Oz.
No damage, per-se but the use has likely freed something up.
Lead Driver
Joined: Jul 2017
Posts: 9,606
Likes: 1,175
From: San Jose, CA
While you're under there you should definitely check all of the u-joints and the slip joint of the front driveshaft.
Then you should open up the front diff cover and make sure there's good (and now new) gear lube in there. Unless you know it's been done in the last few years that is.
Same for the t-case itself. Has it had it's oil changed lately?
Maybe as simple as the nut coming loose on the transfer case output yoke, OR front end pinion yoke.
At this point it all deserves checking.
Otherwise totally agree with the others. On the trucks just a few years earlier sometimes the locking hubs were an option! So the front end and some of the t-case bits were constantly turning anyway.
Part of your normal maintenance is (supposed to be) to either lock the hubs and drive it normally. Or I sometimes shift the t-case into 4wd and drive around instead.
This is to keep the gear lube coating all surfaces, keep things working in general, and to let you keep an eye on things so they don't fail when you need them most in an emergency.
Good luck.
Paul
Then you should open up the front diff cover and make sure there's good (and now new) gear lube in there. Unless you know it's been done in the last few years that is.
Same for the t-case itself. Has it had it's oil changed lately?
Maybe as simple as the nut coming loose on the transfer case output yoke, OR front end pinion yoke.
At this point it all deserves checking.
Otherwise totally agree with the others. On the trucks just a few years earlier sometimes the locking hubs were an option! So the front end and some of the t-case bits were constantly turning anyway.
Part of your normal maintenance is (supposed to be) to either lock the hubs and drive it normally. Or I sometimes shift the t-case into 4wd and drive around instead.
This is to keep the gear lube coating all surfaces, keep things working in general, and to let you keep an eye on things so they don't fail when you need them most in an emergency.
Good luck.
Paul
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Cross-Country
Joined: Mar 2015
Posts: 73
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The only thing of that list Ive not done in the last 6 months is check the nuts at the t-case and the front driveshaft.
Those few days I talked about in my first post was back in October before we got any snow but yesterday morning I had to drive about 20 miles in a mini blizzard, slick as snot, something I normally would just not do, had it in 4H the whole trip, it was a reminder that I needed to find out whats with the noise. I usually lock the hubs at the first sign of snow and will only engage the t-case long enough to get me moving when needed.
Those few days I talked about in my first post was back in October before we got any snow but yesterday morning I had to drive about 20 miles in a mini blizzard, slick as snot, something I normally would just not do, had it in 4H the whole trip, it was a reminder that I needed to find out whats with the noise. I usually lock the hubs at the first sign of snow and will only engage the t-case long enough to get me moving when needed.
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