If you are running an automatic the turbo motor is a drop in on the 4 speed auto. If you have an older 3 speed auto the bolt pattern is differant (86 and older).

The 4 speed auto is pretty strong and the 4 cyl unit is very similar to the V6 auto.

The V6 auto has a lock up converter (most likely phased in somewhere in late 89- early 90).

Improvments to the transmission.

As Eddy pointed out you must have the throttle cable hooked up. No throttle cable = fried transmission from slippage.

The 4 cyl transmission can use the line pressure regulator spring from the V6 to get a higher line pressure to improve shifts and reduce the chance of slippage. This is an internal part in the valve body. you can also shim the spring a little bit. I would not bother shimming the V6 spring.

It is also possible to use a V6 tranny if you bolt the 4 cyl bell housing on it. This gets you a lock up converter on the 4 cyl. The vehicle will run cooler on the highway and get better fuel economy. The taller the tires you run the more important this is (more load on the drive line = more converter slippage= more heating & worse fuel economy).

Kevin C