85 740 transmission swap

[elefem2]

Suppose I had an 85 non-turbo non-od 740 with a bad (automatic)
transmission, and a nice transmission (automatic) from a turbo 87 740.
The 87 trans is 3 and some inches longer overall than the 85. How
smart would it be to try to replace the 85 with the 87? Driveshaft
shortening I can handle, but what would I run into regarding mounts,
sensors, linkages and the like?

 

[traderfjp]

Call a Junkyard and see if you can trade your good tranny and some
cash. It'll be a lot easier for you in the long run.

 

[User]

Suppose I had an 85 non-turbo non-od 740 with a bad (automatic)
transmission, and a nice transmission (automatic) from a turbo 87 740.
The 87 trans is 3 and some inches longer overall than the 85. How
smart would it be to try to replace the 85 with the 87? Driveshaft
shortening I can handle, but what would I run into regarding mounts,
sensors, linkages and the like?

Just swap in the new trans and use the cross member and drive shaft from
the donor. The kick down cabe bolts right up as well as the shifter
linkage. If you have the donor car pull the gearshift assembly and link
rod from it. Everything is a straight bolt up. The turbo trans is
stronger.

Bob

 

[Mike F]

Just swap in the new trans and use the cross member and drive shaft from
the donor. The kick down cabe bolts right up as well as the shifter
linkage. If you have the donor car pull the gearshift assembly and link
rod from it. Everything is a straight bolt up. The turbo trans is
stronger.

Bob

Since the AW used in the non turbo is physically identical to the AW in
the turbo, my guess is the original transmission is the ZF22, which
would require a fair amount of modification to swap out. You'd need
some way to control the overdrive solenoid, new or modified transmission
cooler lines and the PRND21 shifter to replace the PRND321 shifter that
the ZF type transmissions come with. And maybe some other stuff, I
don't know as I've never done this.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

[James Sweet]

Since the AW used in the non turbo is physically identical to the AW in
the turbo, my guess is the original transmission is the ZF22, which
would require a fair amount of modification to swap out. You'd need
some way to control the overdrive solenoid, new or modified transmission
cooler lines and the PRND21 shifter to replace the PRND321 shifter that
the ZF type transmissions come with. And maybe some other stuff, I
don't know as I've never done this.

All the wiring is there already, you just need the harness that goes
under the car, the mounts and the interior shifter assembly.