how HOT is too HOT???? (rear diff /tranny/transfer)

Posted by Dave Austin on Sunday, April 03, 2005 at 5:39PM :

ok.

after taking my wc-12 1/2 ton for its maiden voyage of over 70 miles one way this weekend, I noticed after returning home that the rear diff was VERY HOT.. Whats hot? It seemed really hot..hotter than I would think is normal. too hot to hold my hand on the rear diff cover or any part of the 3rd memeber for more than a second or too.. IT was hot..

Now, with that said, I recently purchased from a private party a rebuilt M37 rear diff with 4:89 gears.. I installed it doing all the proper things like three gaskets, etc, etc.

Now, I drove this truck non-stop 70 miles home.

Today, in Texas, its 65-75 degress or so.

Is this diff getting too hot for a reason? Is there a problem here?

For a gauge, I also crawled under the truck and felt the transfer case and tranny. Both were hot, but not as hot as the rear diff.

the transfer was the coolest, I could keep my hand on it like 5-7 seconds before being uncomfortable.

the tranny was hot too, and maybe close to the rear diff , but not as hot.. it was hot enough to only hold my hand on it a couple of seconds.

is this all normal or what? whats is you guys opinion here?

thanks all,

Dave

Follow Ups:

• Re: how HOT is too HOT???? (rear diff /tranny/transfer) - Vaughn 9:34PM 04/04/2005
  • <<UPDATE>> all appears fine??? - dave 8:46AM 04/05/2005
    • Re: <<UPDATE>> all appears fine??? - Vaughn 9:37PM 04/05/2005
• 3 Gaskets NOT always used - Paul (in NY) 8:12PM 04/03/2005
• Re: how HOT is too HOT???? (rear diff /tranny/transfer) - Jerry Henry 7:21PM 04/03/2005
  • Re: how HOT is too HOT???? (rear diff /tranny/transfer) - dave 8:27AM 04/04/2005
    • My transfer case is running 140 deg. - Will (in MI) 8:34PM 04/04/2005
    • Consider Paul's suggestion. - Jerry Henry 10:34AM 04/04/2005

Post a Followup