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I am going to change the gear oil in the front and rear axel and I would like to know if the drain plug gasket needs to be replaced, what size, type, and where can I get them.
Thanks for any and all help.
T.R.

There is no gasket. The drain plugs are pipe threads. Maybe a little pipe dope on the threads is all you need.
Tim

Axel = A figure-skating maneuver in which the skater jumps up into the air and turns around 360 degrees before alighting.

Axle = A piece of metal which joins two wheels in a parallel configuration.

Got it?

YOU ARE A PISSER,

Hi Lifer,
How about "Bumber" and "Wench"?
Two common ones that come to mind!
Tim

Tim, TM 9-8030 page 325 paragraph 207.c., reads Drain Plug. The drain plug is a special plug. A 7/8" annular gasket is used with the drain plug. Check the plug and gasket each time the axle is serviced, and replace if necessary. My truck is 57 years old maybe it should be replaced?

Lifer, thanks for the spelling correction, I'll try to remember that next time.

The plug is not pipe threads at all, but a special type as you have learned. The gasket is copper, they last a long time generally speaking, but will become compressed to the point of destruction over time. We usually make replacements as needed for ours. I agree it is a good idea to also use a high temp thread sealant, the type used for hydraulic fittings works great.

8543bob wrote:YOU ARE A PISSER,

Yeah....I know. The devil made me do it!

powerwagontim wrote:Hi Lifer,
How about "Bumber" and "Wench"?
Two common ones that come to mind!
Tim

I've never encountered "bumber" yet. Seen lots of "wenches," though.

Do you know the TPI and pitch offhand if it's a non-standard one?
J.B.

TR,
My apologies! More of my experience is on Power Wagons than M37s, although I am picking up the M37 dialect too! The Power Wagons share many of the same components as the M37s, including the differentials. and brake parts. The axle shafts are different, as are the tubes. And, as i know now, the drain plugs! The Power Wagon drains are a 1/2" pipe plug. I made an assumption, and we ALL know what that means!
Again, sorry for disseminating wrong information, and thanks to Charles for correcting it.
Tim

powerwagontim wrote:TR,
My apologies! More of my experience is on Power Wagons than M37s, although I am picking up the M37 dialect too! The Power Wagons share many of the same components as the M37s, including the differentials. and brake parts. The axle shafts are different, as are the tubes. And, as i know now, the drain plugs! The Power Wagon drains are a 1/2" pipe plug. I made an assumption, and we ALL know what that means!
Again, sorry for disseminating wrong information, and thanks to Charles for correcting it.
Tim

I figured you were speaking based on a PW housing, although I've never seen a PW that had a 1/2" NPT plug in the diff housing. All that have been through here have had 1/8" NPT plugs, we have enlarged and tapped a few to 1/4" NPT, as the 1/8" hole is very small.