International Harvester trucks used mostly Borg-Warner
transmissions and these transmissions can make good swaps for Jeeps.
The difficult part about the swap in often the input shafts are too
long and the IH bell housings are not useful in Jeep applications. IH
trucks also used the Dana 18, Dana 20, and a special version of the
Dana 300, so that helps make them useful for Jeep applications.
Some confusion can be generated by the IH transmission codes
because the numbers seem similar to model numbers used by the
manufacture. For example, a transmission with the IH T-14 designation
is different from Borg-Warners T-14, the IH T-14 is a T-90. Check out
the cross reference article for more information.
T-90: A T-90 is nothing to get all excited about, they are light
duty and high geared. In theory, you could use an IH T-90 in your
T-18: The IH T-18 can be useful for parts or swap into a Jeep
T-98: The IH T-98 can be useful for parts or swap into a Jeep
T-19: Most IH T-19 are close ratio like the Ford T-19s. Good
transmissions, but not the best for four wheeling. IH did make a wide
ratio T-19 that is hard to find and highly coveted by four wheelers.
TF727: The IH T-18 can be useful for parts or swap into a Jeep
Cross Reference: Howard Pletcher's cross reference of confusing IH
part numbers to OEM part numbers.