Hey guys I'm new here but I'm stuck with an issue I just ran into and can't figure out the solution.

I have 2 1995 jeep grand cherokees that I'm doing a motor swap on. Black one is running but brown one isn't. My brown one is a lot nicer but the motor blew up due to a previous mechanic.
I got to the point where I swapped over the motors and found out the flex plate won't line up to the torque converter no matter what I do. It's always offset by a little. So I decided to pull the motor again and change flex plates. Well the one on the brown jeeps blown up motor won't bolt to the back of the black jeeps motor.
Also their torque converters aren't interchangeable. The shafts on the black jeep are smaller.

Any help will be greatly appreciated.
*edit* just looked up the vin on the black jeep. It's a 97 not a 95. Is it possible to get the flex plate to fit or is it a different crank shaft?

 

Welcome to the forum.

It is always useful to identify the vehicle / parts, like model year, engine size, transmission model and so on...

Here is the flex plate from my '94 ZJ w/ 5.2L and 46RH transmission.

Note that one bolt hole is offset by 5°.

FWIW, I use / follow the FSM for all of these projects. That document is VERY complete and is an essential tool whenever working on these vehicles.

I learned the HARD way that thread locker is required for the bolts retaining the flex plate to the crankshaft and retaining the flex plate to the torque converter. That essential bit of info is not documented in the FSM.

 

It definitely has to due with the fact that one motor is out of an OBD1 jeep and the other is OBD2. The back end of the crankshaft is slightly different on the two.

I'll probably end up rebuilding the original motor. Since I can't see a way to get the flex plate to adapt to the other motor.

 

The crankshaft has a unique bolt pattern to ensure the flex plate only may be installed at one rotational location.

 

I spun that thing 6 different ways but it never ended up lining up. I can try again later today. You'd think all the 5.2l v8 would have the same crankshaft bolt pattern.

 

The '93-'95 ZJ (1st generation) w/ the 5.2L V8 have the 46RH transmission, like mine.

The '96-'98 ZJ (2nd generation) w/ the 5.2L V8 have the 44RE transmission.

Maybe any crankshaft bolt pattern differences relate to the transmission change.

 

That is probably the exact problem. Is the 44re better by chance? I really dont want to rebuild an entire motor.

 

The 46RH is hydraulically controlled, H in model name.

The 44RE is electronically controlled, E in model name.

The 46RH has greater capacity than the 44RE and the 46RH can be built to diesel truck capacity.

This topic shows the rebuild of my 46RH transmission.

 

FWIW, the bigger issue would be getting an OBD II motor to be "happy" in an OBD I vehicle, or vice versa.

That task is not something I would want to undertake.

 

I figured it would be too complicated being that it's all top end related to OBD models.
I've already switched over everything from old motor to new motor.
I had it all mounted up and went to install flexplate bolts and they didn't line up haha.
might just trade the 97 jeep for a running OBD1 motor.