I have the manual for the V5M31 transmissions.
Here is an application table from it. It only covers up to 1996.

If you need the manual, PM me your e-mail address.

On the 4m40 vs the 3.0V6:

Depending on your driving style, you might just prefer the diesel.
I have had both (3.0V6 and 2.8TD) as company transport, and I prefer the diesel for it's torque and economy. Unless you want to race, the diesel is a pleasure to drive.

The best of the bunch is the 4m41, though (3,2 Di-D diesel)!

[Linked Image]

[Linked Image]

1989 Exceed LWB
4m41 (3.2DiD TurboDiesel
5-spd Manual Tranny
2" lift
31" BFG A/T