[Gmecm] Geting rid of electronic transmission.

[davesnothereman at netscape.net]

For perspective, the 700R4 has taken somewhere around 15 years for the 
combination of GM and the aftermarket to fix.  GM's answer is really 
about the best, remove the valve body and replace it with solenoids.  
Although there are some good fixes for the mechanical version in the 
aftermarket.  But I agree that there are too many failures in the 
700R4/4L60E trans family.  The E series failures seem to be most common 
in V6 powered trucks, especially S series vehicles.  Prolly a 
combination of vehicle weight, insuficient cooling, and excessive 
shifting and converter locking/ unlocking.  It was no surprise when a 
friend asked me in December if he could replace his 4L60E with a 700R4, 
just to keep the beater running.  What better opportunity to find out 
if it will work?  The ecm performed with no problems... didn't even 
light the check engine light (to my surprise).  We rewired the TCC 
through the brake switch and the 4th gear switch in the trans so he'd 
get lockup and converter cooling in 4th, and all was well.  For about a 
month... then the 700R4 died.  And last month, his next beater, an Olds 
Bravada with 4L60E, puked a trans also. lol!

So go ahead and make the swap.  Don't forget to make sure the TV cable 
is connected and adjusted properly.  I've seen 700R4's die in less than 
a week due to misadjustment.

Zaphod
-----Original Message-----
From: JD <jdeeze at mhtc.net>
To: gmecm at diy-efi.org
Sent: Tue, 28 Feb 2006 09:21:57 -0600
Subject: [Gmecm] Geting rid of electronic transmission.

   The experts on this list are usually way over my head, so who better 
to ask?
 I just bought a 94 K1500 Chevy pickup with a blown 4l60E transmission.
  I have a high performance/towing 700R4 4x4 trans with only a couple 
miles on it.
  Question is will this screw up the computer if I don't connect the 
transmission wiring.
 I planned to change to the TV cable and correct TBI from a 92.
  The trans is setup with TCC to automatically engage in OD unless I 
manually shut it off.
 The ecm is 16196395 BJLH.
  I need to know if the 4 inputs wires on the trans affect the engines 
outputs or are they strictly for
 transmission control.
 They are:
 B4 5v ground
 F1 trans mode A
 E5 " " B
 E4 " " C
  The 700R4 Cost over $1600 to have built and I don't like the record of 
the 4L60E's anyway.
 Think it will work?
 JD

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