is it gonna fit?

[Robert Lewis]

Are they the same length? interchangeable?








> > > The numbers floating around here are a little off.  As I was once
told,
> > the
> > > 4L60 = 600Nm of torque, which is 440ft-lbs.  This is nominal for most
> high
> > > performance stuff.  The problem is the 2-3 clutch pack and
over-heating.
> > > The 4L80 = 800Nm which is 590 ft-lbs.  Ahh, much better.
> > >
> > > Steve
> > >
> > > -----Original Message-----
> > > From: Gonyou, Jeremy (.) [mailto:jgonyou at ford.com]
> > > Sent: Friday, May 18, 2001 9:09 AM
> > > To: 'gmecm at diy-efi.org'
> > > Subject: RE: is it gonna fit?
> > >
> > >
> > > I believe the difference in capacity is 200 ft-lbs.  Meaning the 4L80
is
> > > rated at 800 ft-lbs and the 4L60 is rated 600 ft-lbs.  However this
> > accounts
> > > for torque multiplication from the torque converter, so it is actually
> > > *half* that.
> > >
> > > Jeremy
> > >
> > > -----Original Message-----
> > > From: don.broadus at exeloncorp.com [mailto:don.broadus at exeloncorp.com]
> > > Sent: Thursday, May 17, 2001 12:25 PM
> > > To: gmecm at diy-efi.org
> > > Subject: RE: is it gonna fit?
> > >
> > >
> > > Does the 4L80E have that much more torque handling
> > > capacity compared to the 4L60E ?   thanks
> > >                                                        Don
> > >
> > >
> > > > -----Original Message-----
> > > > From: Shannen Durphey [SMTP:shannen at grolen.com]
> > > > Sent: Thursday, May 17, 2001 10:39 AM
> > > > To: gmecm at diy-efi.org
> > > > Subject: Re: is it gonna fit?
> > > >
> > > > 4L60=700R4
> > > > Gm game. New name, same ol same ol.
> > > > Shannen
> > > >
> > > > Squash wrote:
> > > > >
> > > > > I don't think they started using the 4L60 until 1991.  If it's an
88
> > it
> > > > prolly has a 700R4 or
> > > > > TH400.
> > > > >
> > > > > Squash
> > > > >
> > > > > --- Jake Kooser <jake_k at attglobal.net> wrote:
> > > > > > bummer.
> > > > > >
> > > > > > Jake Kooser
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: owner-gmecm at diy-efi.org
[mailto:owner-gmecm at diy-efi.org]On
> > > > Behalf
> > > > > > > Of Shannen Durphey
> > > > > > > Sent: Thursday, May 17, 2001 12:44 AM
> > > > > > > To: gmecm at diy-efi.org
> > > > > > > Subject: Re: is it gonna fit?
> > > > > > >
> > > > > > >
> > > > > > > The 88 truck would have a THM400 or 4L60.  You would need to
> > > > > > > score a newer model
> > > > > > > truck for the 4L80E.
> > > > > > >
> > > > > > > 4L60 transmissions after 86 are generally stronger, but
> > > > > > > definitely try to get some
> > > > > > > idea as to the condition of the fluid and miles on the trans
> > > > > > > before buying.  Truck
> > > > > > > transmissions tend to get worked harder.  But you know that.
> The
> > > > > > > ecm would be our
> > > > > > > friend and brother, the 7747.  But the 7747 really likes to be
a
> > > > > > > tbi ecm.  TPI is
> > > > > > > better run with a tpi ecm, and since you're not worried about
> > > > > > > controlling a 4L80E,
> > > > > > > you can use the 727/730 sd tpi ecm.
> > > > > > >
> > > > > > > Fwiw, ymmv, hth.
> > > > > > >
> > > > > > > cya.
> > > > > > >
> > > > > > > I mean, see ya.
> > > > > > > Shannen
> > > > > > >
> > > > > > > Jake Kooser wrote:
> > > > > > > >
> > > > > > > > Somebody here in South Florida was kind enough to roll their
> 88
> > > > > > > 3/4 ton 4X4
> > > > > > > > PU and now is parting it out.  I've got an '85 suburban 3/4
> ton
> > > > > > > 4X4 and I
> > > > > > > > want to swap my TH400 trans for a 4L80E if I can.  Does
> anybody
> > > > > > > here know if
> > > > > > > > that truck would have that trans, or would it be the 700R4
> > > > > > > still?  If it's
> > > > > > > > the 700R4, isn't this after the "fixes" to the early model
> > > > > > > 700R4 problems?
> > > > > > > > Should I get the transfer case too?  What else would I need
to
> > > > score to
> > > > > > > > control the transmission (assuming 4L80), ECM guys?  And
> > > > > > > finally, what ECM
> > > > > > > > would be in this truck, and could it be taught to control a
> > Tuned
> > > > Port
> > > > > > > > engine?
> > > > > > > >
> > > > > > > > Sorry for the geyser 'O' stupid questions, but just the
> > > > > > > possibility is like
> > > > > > > > winning the lottery here.  Big Sub like gasoline just a
little
> > > > > > > too much...
> > > > > > > > Especially after coming from an air-cooled VW.
> > > > > > > >
> > > > > > > > Jake Kooser
> > > > > > > >
> > > > > > >
> >
>
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> >
>

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