Rear main seal replacement
-
- G-Staff Sergeant
- Posts: 55
- Joined: Thu Dec 24, 2020 7:46 am
- Location: Phoenix, AZ
Rear main seal replacement
I have a leaking rear main seal. For anyone that has replaced the seal, did you go with a NOS seal or just make your own with gasket maker?
-
- G-Lieutenant General
- Posts: 5820
- Joined: Wed Dec 18, 2002 11:00 am
- Location:
Re: Rear main seal replacement
AO-42 2-cylinder?
Not sure what you are asking, the front and rear crankshaft seals are rubber-lip metal-backed seals, not something you can make with gasket maker. I would not recommend NOS seals, they are usually hard and brittle. Contact John Emery and get fresh, new production seals and the new gaskets, too.
Not sure what you are asking, the front and rear crankshaft seals are rubber-lip metal-backed seals, not something you can make with gasket maker. I would not recommend NOS seals, they are usually hard and brittle. Contact John Emery and get fresh, new production seals and the new gaskets, too.
-
- G-Staff Sergeant
- Posts: 55
- Joined: Thu Dec 24, 2020 7:46 am
- Location: Phoenix, AZ
Re: Rear main seal replacement
I thought this leak went away for a bit, but it's now back and worse. The oil is collecting at and dripping from the bottom of the flange where the engine and transmission mate. Is the gasket there 2520-918-6194?
- nickd
- G-First Lieutenant
- Posts: 656
- Joined: Fri Oct 28, 2005 5:00 am
- Location: Wilmington Delaware
- Contact:
Re: Rear main seal replacement
There is a gasket between the transmission bell housing and the engine. If there is an oil leak at that location it could be the rear engine seal if it’s motor oil. If it’s 90WT oil it’s the seal in the transmission. Either way the repair will require removing and reinstalling the engine. Once the engine is out, I would replace both. Check the manuals for further detailed information.
1986 M998 & M1102 trailer
2 M275A5 1 with 4ws
1 M274 w/106 recoilless rifle and all accessories FOR SALE with spare rear transaxle and transmission
1 M274 W/TOW removed from the inventory
1 m274 w4ws
M102 105 mm Howitzer
75mm pack Howitzer
John Deere military gator
1986 Humvee with 6.5 non turbo slant back, armored turret and gunners shield
2 M275A5 1 with 4ws
1 M274 w/106 recoilless rifle and all accessories FOR SALE with spare rear transaxle and transmission
1 M274 W/TOW removed from the inventory
1 m274 w4ws
M102 105 mm Howitzer
75mm pack Howitzer
John Deere military gator
1986 Humvee with 6.5 non turbo slant back, armored turret and gunners shield
-
- G-Lieutenant General
- Posts: 5820
- Joined: Wed Dec 18, 2002 11:00 am
- Location:
Re: Rear main seal replacement
If you are leaking oil between the engine and the bell housing, you first need to pull the bell housing drain plug and see if there is any oil in the housing. Should be dry or at least only a few drops. If you get much oil, you need to determine if it is engine oil or transmission oil. Most likely transmission oil from leaking axle seals. It's a real pain to change the seals, the ring gear must be removed as the inner seal is installed from the ring gear side.
Who is online
Users browsing this forum: Majestic-12 [Bot] and 29 guests