'91 ford ranger 6cy 4.0L tranny used on '98 ford ranger 6cy 3.0L...Is it possible?

 

No.
It will fit, but it will not work
The '91 uses and A4LD semielectronic shift.
The '98 uses either an 4R44E or 5R55E fully electronic shift

Why would you want to downgrade?
What is wrong with your current trans?

 

The bolt pattern between the engine and transmission is different between a 3.0L and a 4.0L

 

I have a '91 tranny, but motor died. Found '98 with low mileage but needs tranny.. since '91 tranny rebuilt just a few years ago, was wondering if could just dropped it into '98. Yeah, I figured it would be upgrade tranny on '98, but had to ask.

Maloha for responding...to all who responded too...aloha.

 

It will work. You will get good 1-3 shifting, but you are to make wiering for OD and TC... But ECM will have 2 faults, becouse 4R44E has 4 solenoids, A4LD - 2 only (TC and OD).

Instead of 2 solenoids use 2 bulbs ore 50 ohm resistors, and no codes....

I did it....

 

Why not rebuild the transmission on the '98. You can do it yourself. Just a matter of time. Just get upgrade parts and keep track of the order in which everything gets disassembled. I think that would be a better way to go, since the '98 tranny is better and stronger in general.

 

Bear River! It is easier to install '89 tranny. To twist wires is easier. To connect 2 solenoids only and to terminate 2 unused wires with resistors. I did it.

ECM of '98 ranger shifts 1-2, 2-3, 3-4 (OD) and locks TC.

There are no 1-2 and 2-3 solenoids in old trannies but OD and TC clutch. Use them!

On newer trucks OD may be applied not only with direct gear (3) but with 2nd and that's why they are 5st autos....

5R55E may easily be installed on old engine, but with newer ore self-made ECM. 2 ecms work parallely, one for engine, other for tranny.