I have found several pin-out lists/diagrams for the 7427, but most of the 4L80 wiring stuff is not there.
Anybody have a chart for these?
Thanks,
Jim
I have found several pin-out lists/diagrams for the 7427, but most of the 4L80 wiring stuff is not there.
Anybody have a chart for these?
Thanks,
Jim
1978 Cherokee chief
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard 7427 TBI w/ 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
16197427 was the last upgraded PCM for this line, it came with $0D, $0E etc... Pinouts for 4l80E are in 16196395 PCM info thread.
http://www.gearhead-efi.com/Fuel-Inj...Information-OE
In a eTrans thread it was mentioned a Lt1 PCM that comes with 4L60E would run a 4L80E trans without change. I wonder if $0D would? There is a difference in TCC for 94 to 95 being PWM TCC converter. I don't know what would happen if you mixed a 94 bin with 95 trans?
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Thanks, that should help.
Not sure what differences there are with the transmissions. I believe the one I have is a 96, hopefully that dont cause me any issues. Price was right though, straight swap for a 700R4.
If its not one thing its another.
Being able to use $OD woulld be helpful, seems to be a lot more info out for it.
Jim
Last edited by Blazer3664; 12-25-2012 at 09:48 AM.
1978 Cherokee chief
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard 7427 TBI w/ 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
This is from a cahall who got banned on Impala SS forums.
None of the '93 -'97 4L60E's are directly interchangeable, except '93 and '94!!!
Here's a list of yearly differences that will show you why. Yes, some years will
fit in others and may not even throw a code, but there will be an issue in the
long run. The big issues become forced 3-2 downshifts, and converter lock up
issues and burnt lock up clutches. When a converter cluych cause it to lose lock
up, the 3-4 clutches, in the transmission will soon follow because the 3-4's
need lock up to keep them cool while cruising in overdrive.
1993: These were used in trucks only. Not
available in F-Bodies, B-Bodies, or Vettes
1994: Interchangeable with '93 4L60E with
no modifications. The '93-'94 is a NON PWM transmission. This means that the
lock up apply strategy is an on /off arrangement. It has an 11 pin case
connector. Does not have PWM cast into front pump. 1 piece TCC control valve in
the valve body. Plate has holes in plate, marked in diagram below. 1st design
3-2 valve
1995: Stand alone year! Will
not interchange with any other year. This is a PWM transmission. An extra
solenoid was added to the valve body to control the pulsed lock up strategy of
the conerter clutch. It has a 12 pin case connector, extra wire in the
transmission to computer harness and different computer to control the new PWM
circuit. Has PWM cast in front pump. Front pump internal passages different to
match new TCC strategy. 2 piece TCC control valve in valve body. Has holes in
plate, marked in diagram below. 1st design 3-2 valve. 12 pin case connector. '94
computer won't recognise new TCC strategy., and will burn lock-up clutch and 3-4
clutches up. '96 computer isn't compatible with '96 3-2 control solenoid.
1996: The 3-2 downshift strategy was changed
to an on /off arrangement. The TCC control solenoid was changed to a 20-31 OHM
solenoid, from the previous 10-15 OHM solenoid. The 3-2 control valve was
changed to the second design valve. The easiest way to identify the valve is,
the second design valve will fall out as soon as the solenoid is removed. The
first design has a plug and retaining clip. TCC solenoid remains 10-15 OHMs,
which is the same as the '95 arrangement. Has PWM stamped cast in pump. pump is
the same as '95. Will not interchange with '95 unless changing 3-2 solenoid,
valvebody casting, and seperator plate. Has holes in plate marked in diagram.
'94 or '95 computer will not accept the 20-31 OHM 3-2 solenoid and will throw an
SES light and throw the transmission into limp mode. Some less knowledgeable
builders will swap the solenoid so the computer will see the correct resistance,
but the valve itself then causes downshift issues. If only the solenoid is
changed, it will result in a 3-2 downshift cut loose. In other
words...3-neutral-2 downshift. Speedo moved to passenger side of tail housing,
but easily changed.
1997: Basically the
same as '96.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Hmmmm, read the last post here .....................
http://www.fullsizechevy.com/forum/g...4l80e-bin.html
Still looking myself, but I may have to pin him down and beat it out of him, or just ask
Jim
1978 Cherokee chief
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard 7427 TBI w/ 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
I'll have to make sure my transmission guy knows what computer I am running. Sounds like my rebuild may have just gotten more expensive. Great.
Jim
1978 Cherokee chief
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard 7427 TBI w/ 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
OK, I got the 12 pin connector, but no "PWM" casting ANYWHERE that I can find. Anyway, by the above that means '95^ so my tranny guy (automotive, not THAT, get mind out of the gutter) should be able to set it up no prob. The old boy is kinda .......crazy, but very good at what he does.
Jim
1978 Cherokee chief
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard 7427 TBI w/ 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
I don't think that there are letters cast into the pump, I think what he meant was when it is disassembled you can see the PWM valve cast into the back of the pump.
1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
1981 Camaro Z-28 Clone, T-Tops, 350/TH350
1981 Camaro Berlinetta, V-6, 3spd
1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s
Bookmarks