How warm do rear axles get?
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Posting Guru
Joined: Jul 2004
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From: Cottage Grove, WI
How warm do rear axles get?
Hey guys, quick question. How warm should the housing for the rear axle get after driving say 10 mi? On both my 89 F250 and my 95 F150 even after a short trip like this the housings are quite warm, almost too hot to hold. Is this right, or should I begin to worry about both my trucks? Thanks for any opinions!
Lead Driver
Joined: Sep 2003
Posts: 7,015
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From: SoCal
I think getting very hot is expected. After all, the gear teeth surfaces slide across each other under enough pressure to move the truck. The old 9" differentials were the worst due to the placement of the pinion relative to the ring gear to allow for the nose bearing.
If you're concerned, check the vent tube of the case after a drive to see if the lube is burning. The lube will get hot, but it should not burn.
If you're concerned, check the vent tube of the case after a drive to see if the lube is burning. The lube will get hot, but it should not burn.
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
The gears are probably the hottest components, but they do not have any direct contact to any external components. The pinion bearing area may be the most direct. You could check another truck with the same diff for reference.
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