700R4 Question

[derikleon]

Ok I'm trying to find out when the 700R4 went from a 4 bolt flange at the rear to a 6 bolt?

Up until today i thought they were all 4 bolt, so im kinda confused.

Thanks guys!

 

[Jrgunn5150]

I've had the original in my 87, a junkyard unit, one from Monster transmission on Ebay, and my current TCI Truckmaster, and they all have 4 bolt's. Did you see one? Or did someone just tell you there was one?

 

[4X4HIGH]

That tranny is actually the 4L60E and they went to six bolt tail hosuings around mid 90's IIRC. I did a quick search on google and it appears that the 6 bolt tail housing started in either 1997 or 1998.

 

[darryl]

1996.5 in the vans and 4.3 2wd and 1997 in the fullsize trucks and they also went removable bell and then bigger input and stronger torque in 1998