om617 Ford T-18 1979 4 dr Cherokee - Transfer case selection

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ChiefLilBigEar
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om617 Ford T-18 1979 4 dr Cherokee - Transfer case selection

Post by ChiefLilBigEar » Tue Oct 20, 2020 1:00 pm

Hello,

I have planned to swap an om617 into my 79 Cherokee. I have sourced a T-18 out of an old Bronco that is already mated to an NP208. In the Jeep I have a Dana 20. I am looking at getting a flywheel out of a 240D and a conversion kit from Mercedes diesel 4x4. just starting the process of getting parts together. Brought home an 85 300D with Turbo and a T18/np208 combo last week. Still in the gathering stage.

I am wondering if I should keep the NP208 that is already mated to the trans or the Dana 20 that is already in Jeep? Opinions on the plan as a whole?
I am looking at running at largest 33s will be Daily Driving and some offroad.

- Thanks for your opinions.

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Stuka
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Re: om617 Ford T-18 1979 4 dr Cherokee - Transfer case selection

Post by Stuka » Tue Oct 20, 2020 4:14 pm

Well, neither of them will work out of the box.

You have a passenger side drop front axle. The NP208's are both going to be drivers drop. And, if either of them is a Jeep T18/NP208, its going to have that super long adapter which means it will most likely hit your fuel tank.

Is your current D20 bolted to a T18 also?
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Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ


Billybob535
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Re: om617 Ford T-18 1979 4 dr Cherokee - Transfer case selection

Post by Billybob535 » Mon Nov 09, 2020 2:49 pm

Steer clear of the mercedesdiesel4x4 kit. The ones they have sold over the last few years have had a lot of issues and caused a lot of people damage. If you look in the 617 groups on facebook you will see details of the problems.

Take a look at the kit from doomsday diesel. His kit is far superior to the mbd4x4 kit.
https://www.doomsdaydiesel.net/product- ... dapter-kit

You can remove the ford bellhousing from the T18 you have and bolt a Jeep T176 bellhousing to it (same butterfly bolt pattern). That will give you the AMC bellhousing to block bolt pattern to work with the om617/Jeep adapter kit. You will need to check the input shaft spline to make sure there is a compatible clutch kit (the doomsday kit uses stock clutch kits - and offers a Jeep T18 flywheel option). I don't think there is an easy solution to mating a passenger side drop transfer case to the Ford T18 without spending hundreds on an adapter. It would be cheaper/easier to just swap your 79 passenger side front Dana 44 for an 80+ drivers side drop Dana 44. Its a bolt in swap and they are cheap and plentiful.


rocklaurence
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Re: om617 Ford T-18 1979 4 dr Cherokee - Transfer case selection

Post by rocklaurence » Tue Nov 10, 2020 9:34 am

Id opt for the AX15 vs the T18. Strong enough and has overdrive that is needed for hi way speeds

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