Transfer Case Input Shaft Movement
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3rd Gear
Joined: Apr 2023
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Transfer Case Input Shaft Movement
We recently bought a 2000 Excursion. I was changing all of the fluids and found the transfer case was way overfilled. With that, I pulled the transfer case to change the input shaft seal. As I was removing the seal, I noticed some play in the input shaft. A lot more play than I think there should be. I will try to attach a video. This is my first time working on a transfer case, so can anyone tell me if this is normal or do I need to open it on up and change out the bearings?
Thanks
Thanks
Lead Driver
Joined: Aug 2022
Posts: 5,091
Likes: 1,420
From: Oologah, OK
Bearings will be fine, it was full of ATF.
over full?
should not have been, supposed to let it run out the fill hole until it stops, then plug it up.
maybe the guy had the truck sloping to the other side??
over full?
should not have been, supposed to let it run out the fill hole until it stops, then plug it up.
maybe the guy had the truck sloping to the other side??
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3rd Gear
Joined: Apr 2023
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I wasn’t really worried about the excessive amount of ATF in there. I just didn’t expect to be able to wiggle the input shaft the way I can. I don’t know if it’s meant to be like that so it can align with the tail shaft of the transmission or if the input shaft bearing is bad. Both output shafts have zero play in them.
Fleet Mechanic
Joined: Mar 2023
Posts: 1,594
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While I don't know the actual spec, but the general rule of thumb is one thousands of an inch of play for every inch of shaft diameter in rolling element bearings. New Process may actually have a spec, but just looking at the video it does seem a little excessive to me.
Transfer case parts are pretty cheap really. Here's a full bearing and seal kit for $99. I've bought stuff from Allstate gear a few times , they’re not fast on shipping, but overall I'd buy from them again
https://www.allstategear.com/NP271-N...it-p/bk485.htm
The hardest part is getting the cases split (the dang RTV used on the case halves works) and the only special tool needed is a good set of snap ring pliers.
...
Transfer case parts are pretty cheap really. Here's a full bearing and seal kit for $99. I've bought stuff from Allstate gear a few times , they’re not fast on shipping, but overall I'd buy from them again
https://www.allstategear.com/NP271-N...it-p/bk485.htm
The hardest part is getting the cases split (the dang RTV used on the case halves works) and the only special tool needed is a good set of snap ring pliers.
...
Thread Starter
|
3rd Gear
Joined: Apr 2023
Posts: 3
Likes: 0
While I don't know the actual spec, but the general rule of thumb is one thousands of an inch of play for every inch of shaft diameter in rolling element bearings. New Process may actually have a spec, but just looking at the video it does seem a little excessive to me.
Transfer case parts are pretty cheap really. Here's a full bearing and seal kit for $99. I've bought stuff from Allstate gear a few times , they’re not fast on shipping, but overall I'd buy from them again
https://www.allstategear.com/NP271-N...it-p/bk485.htm
The hardest part is getting the cases split (the dang RTV used on the case halves works) and the only special tool needed is a good set of snap ring pliers.
...
Transfer case parts are pretty cheap really. Here's a full bearing and seal kit for $99. I've bought stuff from Allstate gear a few times , they’re not fast on shipping, but overall I'd buy from them again
https://www.allstategear.com/NP271-N...it-p/bk485.htm
The hardest part is getting the cases split (the dang RTV used on the case halves works) and the only special tool needed is a good set of snap ring pliers.
...
Those prices are good. I was expecting at least twice that.
Yes, splitting the case was the worst part. Thankfully I didn’t break anything while doing it. You’re right, the RTV they used is some strong stuff.
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