Editing Transmission identification (section)
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===T-18=== *The Jeep T-98 has a very similar appearance to the T-18 except a casting number of T98. It is heavy duty like the T-18, but a bit more prone to wear since bearings and lubrication are not as good. :'''Jeep''': *Internals from a T-18 can be put in a T-98 case, case length 11.87" * Cast iron case, first and reverse are not synchronized. *Original Ford truck part number on case T18-1X or 13-01-065-9XX *Were also close ratio transmissions that had a 4.02:1 first gear. There is no way to tell the ratio from the outside, unfortunately. If it’s out of the vehicle, putting it in first gear and rotating the input shaft and counting the output shafts revolutions is the only real way to verify. **Gear Ratios: 4.02 2.41 1.41 1.00 4.73 (Rev.) *The T-18 is probably the most common transmission to swap into a Jeep because it is heavy duty, relatively inexpensive, and it can be swapped in easier than almost any other transmission. *It was used in IH trucks from the mid 1960s until the mid 1970s. They all tend to have long input shafts compared to the Jeep and Ford T-18s. All of the T-18s used in the Scout 800 and Scout II are the close ratio T-18 with a first gear ratio around 4:1. It is an excellent transmission, but it doesn't have the low first gear ratio off-roaders want. Other IH trucks use wide ratio T-18s. *An advantage to the IH 4WD T-18 is most of them were mated to a Dana 20 transfer case. The Dana 20 used in Scout trucks uses the same bolt pattern and input gear as most Dana 20s used in Jeep trucks. The transmission to transfer case adapter for the Dana 20 used in IH trucks is short like the adapter used in Jeep trucks. Rebuilding one of these transmissions with a Ford or Jeep input shaft may be a way of getting a low buck T-18 in your Jeep. <br>
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