transmission swap

[apache24]

Hi folks,

I just blew my tranny in my 91 GMS Jimmy which has a 4L60. I have a 700R4 which I want to put in it but I need to know if there is anything in particular that I have to watch for or change or is it a straight swap. Is there a difference in the kickdown cable for the Overdrive linkage. If anyone can help my out on this it would be great. Need the truck for Monday.

 

[southernspeed]

As far as I'm aware they are exactly the same box. early and late 700s had different parts due to upgrades but the 4L60 was a name change only. 4L60E is a different box though as far as wiring and control is concerned.

 

[Avery4jc]

4L60 runs off the comp...but does it have a TV cable still? the 700 will need it.

 

[cabledawg]

Might have to find a way to "trick" the ECM as the 4l60 was controlled by the computer. Speed sensor will go to the ECM, maybe the TC lockup; backup lights and 4x4 indicator could need plugs changes. You'll need the TV cable for kickdown and to regulate the valve pressure. Summit Racing sells the TV cables for $50 and they should have the bracket to attach it to the intake manifold as well.

 

[sandawgk5]

4L60 and 700R4 are the same thing only the name changed.

The 4L60E is the electronic version.

Which one do you have? It makes the swap a little different.

Ira