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Happened on my fourtrax 400AT and still is its always in the winter. I think its the final drive/rear diff. Tap it lightly with a mallet or hammer w/piece of wood between to try and loosen anything that could freeze inside. After I ride for a bit it thaws out from the friction, however if you don't ride in water/haven't been in water then im not sure.
 

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Happened on my fourtrax 400AT and still is its always in the winter. I think its the final drive/rear diff. Tap it lightly with a mallet or hammer w/piece of wood between to try and loosen anything that could freeze inside. After I ride for a bit it thaws out from the friction, however if you don't ride in water/haven't been in water then im not sure.
An easy fix to diff oils freezing due to water contamination is to add a friction modifier, some contain antifreeze agents of some kind. I’m NOT in any way shape or form advising anybody to add antifreeze to oils.
 
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· Registered
Joined
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19 Posts
Happened on my fourtrax 400AT and still is its always in the winter. I think its the final drive/rear diff. Tap it lightly with a mallet or hammer w/piece of wood between to try and loosen anything that could freeze inside. After I ride for a bit it thaws out from the friction, however if you don't ride in water/haven't been in water then im not sure.
An easy fix to diff oils freezing due to water contamination is to add a friction modifier, some contain antifreeze agents of some kind. I’m NOT in any way shape or form advising anybody to add antifreeze to oils.

Hey Anti-Freeze thats actually not a bad idea for the final drive. Might have to give it a go. When I pulled the fill plug on it the other day, it was all goopy inside (not liquidy at all) so really anything will help at this point.
 

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You say it is not frozen , if that is true , then I would guess one of your differentials could be locked up from bad bearings , on a full time 4x4 if either differential locks up , all 4 wheels are going to lock up
 
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