In a message dated 4/18/99 11:08:14 AM Pacific Daylight Time, lakek@oit.edu
writes:
<<
Sorry guys, Mr. Cummins and Mr. Adrian have gently corrected me. The 4L80E
is the tranny that is based on the old TH-400. The 4L60E is the 700R-4,
and is a newer design that is not as heavy duty as the 4L80E. It sounds
like the 4L80E is the 3/4 and 1-ton tranny. Now I get to go back and tell
my friend at the local "auto recyclers" that he was wrong. So how much
stronger is the 4L80E than the equivalent 4L60E/700R-4? What are these two
transmissions rated at for torque/hp? My 88 1/2-ton has the 700R-4, and I
have done a lot of towing with it. My 86 Blazer (full-size) also has this
same tranny. I have had really great luck with both of them. Is this a
fluke or is the 86 and up 700R-4 that much better? Thanks again for
correcting me, it only hurts a little =^).
Kevin Lake
56 GMC Suburban/napco >>
Just one more minor thing, the 4L60 is the same as the 700R4, the 4L60E was
the electronically controlled version.
There were some significant changes to the 86/87 up version of the 700R4,
of which I don't recall, but just a note, a pre-86/87 700 can be rebuilt with
the newer stlye parts.
I think '90 through '92 the 4L60 was used, after that the 4L60E.
Mike
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|