: My newly installed 8 3/4 rearend seems to be
: running awfully hot. How hot do these things
: normally get? It's hot enough that I can't
: hold my hand on the case for more than 2
: seconds after running the car 30 miles or 5
: miles, it doesn't seem to matter.
:
: I am using 85w140 gear oil, which seems to be
: leaking slightly from somewhere. I haven't
: been able to tell where. The gear oil is
: filled to the bottom of the filler plug. By
: the way, this has 3.55 gears and a sure
: grip.
:
: Also, I don't have the proper axle vent valve
: yet. I've been using a bolt with a hole
: drilled in it. Is it possible that the axle
: isn't venting enough?
:
: Any help would be appreciated. Thanks.

: My newly installed 8 3/4 rearend seems to be
: running awfully hot. How hot do these things
: normally get? It's hot enough that I can't
: hold my hand on the case for more than 2
: seconds after running the car 30 miles or 5
: miles, it doesn't seem to matter.
:
: I am using 85w140 gear oil, which seems to be
: leaking slightly from somewhere. I haven't
: been able to tell where. The gear oil is
: filled to the bottom of the filler plug. By
: the way, this has 3.55 gears and a sure
: grip.
:
: Also, I don't have the proper axle vent valve
: yet. I've been using a bolt with a hole
: drilled in it. Is it possible that the axle
: isn't venting enough?

:
: The venting should not cause overheating, poor
: venting will cause leaks.
:
: Did you have the center section (pumpkin) out?
: How did the unit spin, real easy or with
: some drag? (newly rebuilt ones will have
: some drag due to the bearing preloads, they
: "break-in" and loosen-up after
: some use)
:
: These units do get hot, especally at high
: (freeway) speeds, that why the NASCAR boys
: have to run an oil pump / cooler on the rear
: axle.
: DD

: Thanks for the replies Bud and Doug.
:
: I did forget to mention that this is a new,
: rebuilt third member. I just never knew that
: these things got this hot when breaking them
: in (and I'm paranoid since it is new). I
: probably never even felt the back of my 7.25
: aftering running it.
:
: I am going to re-check my axle endplay tomorrow
: as Bud suggested, just in case.
:
: Thanks again.