I have a bad 700r4, can i use a 4l60e/4l80e? i cannot find a 700 for a diesel anywher

[wdkingery]

i've got a 1989 6.2l diesel GMC Sierra with 221k miles. It has a 700r4 behind it, and it seems the torque converter is dying, dumping trash into the valvebody and causing the valves to stick.. long story short, i need a TQ converter and transmission.

But diesel 700r4's are impossible to find in good shape used, and my NEXT DOOR NEIGHBOR owns a transmission shop and wants TWENTY FIVE HUNDRED DOLLARS to rebuild my 700 (thanks guy )

it seems a 93-95 gmc/chevy trans is much easier to find.

what is this swap going to entail?
does that gas pedal have a sensor on it?
will my current TPS work? i have a VSS on my 2wd.
will i need the instrument cluster?

anyone done this before? please help; my wife is going to strangle me soon if she doesn't get to drive that truck again (she just bought it, and the tq converter dumped on it.)

[trbankii]

I'm not as familiar with the automatics, so somebody can correct me if I'm wrong. I think it was the 4L80E that was behind the diesels. The 4L60E was lighter duty - behind the gas engines in the 1500 and 2500's with 6 lug axles.

Also, the E obviously stands for electronic. So you're going to need a computer to control it. There are aftermarket computers out there for standalone setups where you don't need the ECM.

[wdkingery]

yeah i'm looking for someone that has a bit more knowledge; like has performed this swap.

my c1500 is a light duty application, so the 4l60e will be fine in that regard. and the bus that has the 4l60e in it, also has the TCM to control it.

[Yukon6.2]

Hi
If you are just using your truck for light duty,find a good used gas tranny,buy a new diesel torque for it.Swap the govener from your tranny,new filter and away you go.
There probley are a few other tweeks you can do to make it a better tranny,but gas one will work.
Thomas

[wdkingery]

Really?? I thought there was also something about the valve body that was particular to a diesel. I know there is one extra ball in the valve body for a diesel.

[john8662]

Check around other tranny shops. 2500 is too high. You should be able to find someone who can do one for around 1000-1200.

Yeah, the gas 700 will work, but used 700's for me never worked out.