6.0L swap complete.Shake down of 4L60E - Need some input
#1
6.0L swap complete.Shake down of 4L60E - Need some input
Took the firebird out today for it's maiden voyage before I hand the car over to my kid for his graduation present (He doesn't know).
I'm having some issues with the tranny (4L60E)shifting properly, or should I say shift at all. I was expecting some issues as I accidentally lost track of a pair of wires (2xblack/yellow and 2xpink) when I was extending them. I just need some input on which ones to switch around.
Here are the symptoms. It seems stuck in high gear, I'm guessing 3rd. Is it more likely that this is caused by having switched pin B and pin L around or by pin N and E being switched around? Or a combo of both? Please see attached diagram. I would really appreciate some help as I'm running out of time to have the car ready for my kid.
I'm having some issues with the tranny (4L60E)shifting properly, or should I say shift at all. I was expecting some issues as I accidentally lost track of a pair of wires (2xblack/yellow and 2xpink) when I was extending them. I just need some input on which ones to switch around.
Here are the symptoms. It seems stuck in high gear, I'm guessing 3rd. Is it more likely that this is caused by having switched pin B and pin L around or by pin N and E being switched around? Or a combo of both? Please see attached diagram. I would really appreciate some help as I'm running out of time to have the car ready for my kid.
#2
TECH Addict
iTrader: (22)
The linked diagram isnt enough, the PCM positions arent shown. If the pinout is like 2004 green/blue then the 4L60E wiring is just like common red/blue LS1 PCMs
http://www.lt1swap.com/2004vortec_pcm.htm
Unplug the trans connector and do a continuity test from the individual pins to the PCM. Most likely you got 2 switched. You already repinned it to convert 4L80E to 4L60E so this should be cake. Hardest part is to stretch your meter leads out by yourself
I attached my check list for 4L60E's to cut out the rest of the stuff. There is an error though, Pin S shows B78, its actually B79
http://www.lt1swap.com/2004vortec_pcm.htm
Unplug the trans connector and do a continuity test from the individual pins to the PCM. Most likely you got 2 switched. You already repinned it to convert 4L80E to 4L60E so this should be cake. Hardest part is to stretch your meter leads out by yourself
I attached my check list for 4L60E's to cut out the rest of the stuff. There is an error though, Pin S shows B78, its actually B79
#3
Hey Pocket. I have the pins correct at the PCM, but I lost track of them at the tranny when I cut the wires to extend them after I already had the harness in the car. Just trying to figure out which pins at the tranny are the most likely culprit without having to put the car on stands multiple times.
#7
TECH Addict
iTrader: (22)
Pin E PNK is IGN for all the solenoids
Pin N PNK is switch A which controls internal pressures
Pin B YEL/BLK is 2-3 shift sol
Pin L YEL/BLK is trans temp signal
I really dont know much about internal trans functions but looking at the diagrams, a swapped pink wire would mean NONE of the solenoids work. A swapped YEL/BLK should show up on a good scanner that shows real time data. A trans temp of anything should mean the YEL/BLKs are good. No temp signal or constant 0* means they're switched
Pin N PNK is switch A which controls internal pressures
Pin B YEL/BLK is 2-3 shift sol
Pin L YEL/BLK is trans temp signal
I really dont know much about internal trans functions but looking at the diagrams, a swapped pink wire would mean NONE of the solenoids work. A swapped YEL/BLK should show up on a good scanner that shows real time data. A trans temp of anything should mean the YEL/BLKs are good. No temp signal or constant 0* means they're switched
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#11
TECH Addict
iTrader: (22)
According to this thread, reverse always works
https://ls1tech.com/forums/automatic...-pls-help.html
Once you actually crawl under there, see if you've got 12v IGN on pin E. That'll put it to bed
https://ls1tech.com/forums/automatic...-pls-help.html
Once you actually crawl under there, see if you've got 12v IGN on pin E. That'll put it to bed
#14
sawzall wielding director
iTrader: (4)
Sounds like you have pin E miswired for sure. If pin E is not getting 12 volts you will be able to drive the car and reverse will work but if you put it in overdrive or drive it will always be stuck in 3rd gear. However you can manually pull it down into first and then manually upshift into 2nd and 3rd.
#15
Sounds like you have pin E miswired for sure. If pin E is not getting 12 volts you will be able to drive the car and reverse will work but if you put it in overdrive or drive it will always be stuck in 3rd gear. However you can manually pull it down into first and then manually upshift into 2nd and 3rd.
When I swap those two pins around, what would be the symptoms if the 2-3 Solenoid and TFT sensor were swapped around as well (Pin B and L)? I'm asking because I would hate to have the transmission trying to shift into all kinds of gears at the same time and ruin it.
#18
sawzall wielding director
iTrader: (4)
I`m not sure what exactly would happen if B and L were swapped. My guess is that the trans would not shift from 2nd to 3rd. I would just double check the wires with a volt/ohm meter when you have the plug apart to swap the other wires. It would only take a couple minutes.
#20
Had a chance to take the car for a quick spin. Now I'm getting 3 codes:
P2761 - Torque Converter Clutch Pressure Control Solenoid Control Circuit/Open
P0740 - Torque Converter Clutch Circuit Malfunction
P0785 - Shift/Timing Solenoid Malfunction
Checked the voltages of Pin N and E. Pin N is 12V+ with ignition on (not running) and Pin E is only 3.6V with a small residual voltage with ignition off, what could be causing such a low voltage? I'm guessing this is what's tripping the codes. I need some ideas guys.
P2761 - Torque Converter Clutch Pressure Control Solenoid Control Circuit/Open
P0740 - Torque Converter Clutch Circuit Malfunction
P0785 - Shift/Timing Solenoid Malfunction
Checked the voltages of Pin N and E. Pin N is 12V+ with ignition on (not running) and Pin E is only 3.6V with a small residual voltage with ignition off, what could be causing such a low voltage? I'm guessing this is what's tripping the codes. I need some ideas guys.