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Rear main seal
https://www.slantsix.org/forum/viewtopic.php?t=68150
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Author:  Danrob01 [ Thu Apr 10, 2025 5:28 am ]
Post subject:  Rear main seal

New member.i apologize in advan.unfamiliar with how to navigate and/or post. Couldn't find a thread about rear main crank seal so I saw new post .
If anyone can help I sure would b grateful. Have 1985d100 custom 2w.d. auto. Can not find the 2piece crank seal anywhere the dealership gave me a part number no help online there are ones for d150 V6 or V8 etc. Called everywhere searching online for days. Napa has one listed for w100 suggesting it's the same. I don't want to assume anything while lying on the ground w transmission on my motorcycle jack. Pls help

Author:  eric22t [ Thu Apr 10, 2025 5:48 am ]
Post subject:  Re: Rear main seal

quick search from the shop gets this from o'rielly auto part...

Precision Multi-Purpose Oil Seal PSO 5414

Author:  volaredon [ Thu Apr 10, 2025 7:09 am ]
Post subject:  Re: Rear main seal

Oops

Author:  volaredon [ Thu Apr 10, 2025 7:12 am ]
Post subject:  Re: Rear main seal

I just got an email from rock auto as I've bought parts for my 85 truck from there, with a heads up to "clearance" parts, and one of the things that was included in their list of parts on clearance was a /6 rear main seal.... I don't need one right now, actually have an extra or 2 already.
Once you buy from them they occasionally send you notices of parts they have on clearance vehicles that you have bought stuff from them for, in the past.

Author:  volaredon [ Thu Apr 10, 2025 7:14 am ]
Post subject:  Re: Rear main seal

Quote:
quick search from the shop gets this from o'rielly auto part...

Precision Multi-Purpose Oil Seal PSO 5414
Never actually heard of that brand of any kind of engine gasket or seal

Author:  eric22t [ Thu Apr 10, 2025 7:38 am ]
Post subject:  Re: Rear main seal

same as the ujoint/suspension parts. parent company looks to be ozark automotives(from the copyright of the ujoint catalog)

Author:  eric22t [ Thu Apr 10, 2025 8:03 am ]
Post subject:  Re: Rear main seal

Quote:
. Napa has one listed for w100 suggesting it's the same.

and yes the 4wheel drive one will be the same. the motor parts don't change from 2wd to 4wd

Author:  SlantSixDan [ Thu Apr 10, 2025 10:44 am ]
Post subject:  Re: Rear main seal

If you want one that's easier to make not-leak, there's this (which, yes, also fits big block V8s). Like any oil seal, it has to be installed rightside-in. I'd put the installation split at 12:00 with a small dab of RTV.

Author:  Dart270 [ Thu Apr 10, 2025 11:18 am ]
Post subject:  Re: Rear main seal

Cool item, Dan. Yes, you can use the BB Mopar part number/seal too.

Lou

Author:  Greg Ondayko [ Thu Apr 10, 2025 12:30 pm ]
Post subject:  Re: Rear main seal

I like it.

Thanks for the info.

Greg

Author:  MadScientistMatt [ Thu Apr 10, 2025 2:16 pm ]
Post subject:  Re: Rear main seal

Also, if you're wondering how to remove an original rope seal without removing the crank: Use one of these.

Author:  Charrlie_S [ Thu Apr 10, 2025 3:14 pm ]
Post subject:  Re: Rear main seal

The last few seals I purchased, came with the "Main" seal and the side seals for both the slant six, and the big block in the same package.
Anyone need some extra big block side seals? :)

Author:  Greg Ondayko [ Thu Apr 10, 2025 3:48 pm ]
Post subject:  Re: Rear main seal

Quote:
Also, if you're wondering how to remove an original rope seal without removing the crank: Use one of these.

I have also used drywall screws for my version of the sneaky pete tool for just a few cents.
Worked fine on my 318's

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