Was there a difference

[Deadguy]

Between the military T90 transmission and T18 transfer case and the civilian version?
_________________
1952 M38A1
Marine core reinforced rear bumper, military transistorized turn signal upgrade, arctic heater, 11" drum brakes, 200L PTO winch, Huffy overdrive, deep water fording kit, RT 68 vehicle mounted radio, Trac Locs front and rear.
www.danhenk.com

[Bill_F]

on the shift tower on the t-90 is a little different. It still all works the same and are completely interchangeable.

[evanso1975]

The civilian transfer case didn't have the vent line; there was a breather fitted on top (similar to the WW2 jeeps), but this can easily be removed. Also, there was no bolt-in pin through where the transfer case levers pivot; there was a knock-in pin (again, like the WW2 jeep).

The civilian T90 box is very similar to the M38; the noticeable difference being the shift tower & lever (as Bill_F said). You can see the civvy shift tower on mine here:


I replaced mine with the military shift tower, but the military boot will fit over the civvy shift tower if you don't want to go to the added expense.
Here's a shot of my in-progress civvy T90 mated to a late-WW2 (GPW) jeep transfer box, with the military shift tower fitted:


There's a slightly bigger photo here:
http://www.willysmjeeps.com/v2/modules.php?full=1&set_albumName=album68&id=Owen_s_Transmission&op=modload&name=gallery&file=index&include=view_photo.php
Other than the minor differences noted above, the only other thing I changed was removed the speedo drive from the transfer case and replaced it with the longer M38 type (so I can use the correct M38 speedo cable). I "dry fitted" it to the engine and everything lines up perfect, so I should have no problems when I eventually get the jeep back on the road. In theory.

Hope this helps,
Owen.
_________________
Owen

1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
MVT # 19406

[Bill_F]

I did forget about the transfer difference. o well been a few months since I have had one apart, and even longer since I have seen a civvy one.