4x4 transfer case conversion

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Oct 11, 2010 | 09:37 PM

idealtrucks

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Fleet Mechanic

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From: S/W Virginia

4x4 transfer case conversion

Is it possible to change the transfer case to one of of a late 80's f150? I believe its a BW 1356 maybe?

Oct 12, 2010 | 05:37 PM

cj06

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From: CASA GRANDE AZ

what type of truck are you referring to and what is in there now ? is it a divorced trany case or is it married to the transmission ? all info helps !!

Oct 12, 2010 | 05:41 PM

idealtrucks

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Fleet Mechanic

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From: S/W Virginia

Its a '70 with a 4 speed. I assumed all the '67 to '72 4x4's were the same. Didn't know they came with different types of transfer cases. I don't really know what it is. Just been looking about buying the truck and have read that they don't have a low range.

Oct 12, 2010 | 06:25 PM

Ford_Six

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From: The Big, Oregon

F100 had a mated transfer case, F250 had a divorced so that bit of info is needed.
Either way, I believe you will need a different transmission though. The F100 used (memory is a little foggy here- ) a 16 spline output, and it was an odd length. The D21 transfer case can only be directly swapped with a D20 from an early Bronco, but that still changes your driveshaft lengths. You could probably bolt a later NP435 to your FE bellhousing to use a newer transfer case. From 77 on, Ford used a 31 spline input on the transfer cases.

Oct 12, 2010 | 06:33 PM

idealtrucks

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From: S/W Virginia

I have the T18 tranny and transfer case out of the truck. Would the output of the transfer case line up with the front axle?

Oct 12, 2010 | 06:53 PM

cj06

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From: CASA GRANDE AZ

DETAILED INFO IS VERY IMPORTANT !! now what truck did the T-18 come out of , and what is the transfer case make and model ? there should be a tag on it ! and are they bolted together as in came from the same truck ? or are they 2 separate pieces ?

Oct 12, 2010 | 06:56 PM

idealtrucks

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Fleet Mechanic

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From: S/W Virginia

I know 100% that the trannny is a T18, and I'm 99% sure that the t-case is a BW1356. They are out of a late 80's F150. They are still bolted together just as they came out of the truck.