My Willys 3A and 3B Community

3A, 3B, DJ Technical Knowledge Base => "Modifications"-- Technical Questions, Answers, Incites => Topic started by: DavidF on August 02, 2020, 11:36:50 AM

Title: T98 to d18 shared oil?
Post by: DavidF on August 02, 2020, 11:36:50 AM: I’m sure I used to know this, but do they share oil? It’s a pain to access the t case fill on my b, just wondering if I can overfill the transmission a smidge.
Thanks, Dave
Title: Re: T98 to d18 shared oil?
Post by: Rus Curtis on August 02, 2020, 01:30:28 PM: Quote from: DavidF
Iâ€™m sure I used to know this, but do they share oil? Itâ€™s a pain to access the t case fill on my b, just wondering if I can overfill the transmission a smidge.
Thanks, Dave

David,
Do you have a T98 on your 3B? I know the T90 shares oil on mine, but know nothing about the T98.
Title: Re: T98 to d18 shared oil?
Post by: DavidF on August 02, 2020, 02:51:45 PM: Yes, I swapped it in from a cj6 a few years ago. I pretty much never use first gear, but use second as its synchronized. Not sure if I’d bother swapping it now
Title: Re: T98 to d18 shared oil?
Post by: Rus Curtis on August 02, 2020, 03:22:32 PM: Quote from: DavidF
Yes, I swapped it in from a cj6 a few years ago. I pretty much never use first gear, but use second as its synchronized. Not sure if Iâ€™d bother swapping it now

(I'm quoting because your posts aren't visible and in case others want to see without logging out, like I need to, I quote to copy your posts)

David,
This helped. I don't often reference my late Service Manual, SM-1046, but bought it as it covered CJ-3B also (plus CJ-5/5A and CJ-6/6A and the DJs too). Sure enough, there was a section on the 4 speed T98. I didn't see anything in that section, J1, that mentioned lubrication. Checking the B section however, I found a note at the bottom of the page associated with the directions for lubricating the transmissions on the 4WD vehicles page.

8. Transmission:
3 Speed.....
4 Speed Â°..... (notice the degree symbol)

At the bottom of the page the explanation:
" Â° 4-Speed transmission and transfer case require separate lubrication of each unit."

Both list GL-4 80wt. or 90wt.

Not what you wanted to read, I know. If someone else knows differently, hopefully they check in.
Title: Re: T98 to d18 shared oil?
Post by: oldtime on August 02, 2020, 03:49:32 PM: The T98-A is sealed between the transmission and transfer case.
The seal is actually located in the transmission to transfer case adapter plate.
Title: Re: T98 to d18 shared oil?
Post by: DavidF on August 02, 2020, 04:02:29 PM: Thanks everyone, i'll check them separately. I appreciate the help.
i need to redo my exhaust anyways, maybe i'll add a drop out section to make it easier