The Jeep/Dodge AX15 5-speed, the Jeep NV3550 5-speed, the Toyota R150F & R151F, the 87-92 Toyota Supra Turbo R154 and the Isuzu AR5 5-speed all share the same case to bellhousing bolt pattern. As such there are a number of possibilities that can be had when a 5-speed is desired:
96-99 Dodge Dakota 2.5L bellhousing: Connects all to any Jeep 2.5L L4. Because of it's GM inherited 60 degree bolt pattern, it also works with any Buick FWD V6 and supercharged V6, any Chevrolet 2.8/3.1/3.4 V6, any Cadillac 4.1/4.5/4.9 V8, any Isuzu 3.5/3.5 DOHC V6 and with a minor modification (moving a bolt hole), any Olds Aurora DOHC V8 and Cadillac DOHC Northstar V8.
The R154 out of the 87-93 Supra Turbo is a particularly robust gearbox and is used quite extensively by Australian hot rodders to back up V8 conversions.
http://www.classicconversions.co.uk/r154.htm
Further info: Jeep AX5, Toyota G52/G58, W55, W56, W57 and W58 5-speeds all share a common face pattern on the case. As such, any 88-99 Jeep 2.5L bellhousing (NOT Dakota) will bolt a Toyota W series transmission to a 60 degree GM bolt pattern (and Northstar with the bolt hole mod). The Non Turbo Supra W58 is not as strong as the R154, but is still no slouch.
http://www.classicconversions.co.uk/w55.htm
Greg Williams
