700R4 2WD vs. 4WD

[rs72z]

Originally Posted by 68vert

Hello,

I have a '75 Blazer with a 3 on the tree, and I'm looking to change it to an automatic. I have a bead on a cheap 700R4 out of a '91 GMC 2WD. What needs to be done to put this in my Blazer?

Can I basically remove the 2WD tailshaft, install a different output shaft, and bolt it to my transfer case?

Thanks in advance for any help or advice.

Brian

Nope. You have to tear the trans all the way down and replace the output shaft.

[86 K-10]

Originally Posted by rs72z

Nope. You have to tear the trans all the way down and replace the output shaft.

what he said...now go here ->http://www.transmissioncenter.net/700r4.htm

[BigBlocksRule]

Originally Posted by rs72z

Nope. You have to tear the trans all the way down and replace the output shaft.

No, you don't. That's one nice thing about the 700R4 and 4L60E - you can swap the rear shaft and tailhousing and make it a 4WD unit without a complete tear down.

That said, I wouldn't run a 700 on anything that made a lot of torque or was used for hauling or towing.
There are quite a few vendors now selling stand-alone computers for the 4L80E. It'll take anything you can dish out and more.

[rs72z]

Originally Posted by BigBlocksRule

No, you don't. That's one nice thing about the 700R4 and 4L60E - you can swap the rear shaft and tailhousing and make it a 4WD unit without a complete tear down.

That said, I wouldn't run a 700 on anything that made a lot of torque or was used for hauling or towing.
There are quite a few vendors now selling stand-alone computers for the 4L80E. It'll take anything you can dish out and more.

Yea, the only thing you dont have to pull out is the low/reverse clutches.