May 27, 2016, 02:06 PM
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Transmission issues
Transmission issues If you've read any previous threads of mine you know that I'm installing a lq4 from an 06 silverado into a 98 camaro. v6 to v8 swap. Everything is in as far as electronics and hard parts go and she starts and runs amazingly... except the transmission. 4l60e from an fbody, yes the computer was tuned to accept it.
After initial troubles with the TC/bellhousing I got all new components for an LS1 F-body including a new flexplate, bellhousing, and TC that all linked up well. Still no luck with the trans. No forward or reverse movement, though the rpms change as if the trans is shifting correctly. I borrowed a really nice scan tool and found that the trans stays in 1st gear (or so it thinks) no matter what I do. the following DTCs are present:
P0713, P0740, P0758, P0785, P01860
I suspected the range selector, but the ignition does not switch to run unless the car is in park or neutral. I was also told that I should be able to manually shift it no matter what as long as the fluid was present and the pressure correct (no way for me to confirm the pressure, though)
I have also replaced the TCC solenoid and harness and 3-2 shift solenoid.
any and all suggestions/ ideas will be welcomed. Thanks!
After initial troubles with the TC/bellhousing I got all new components for an LS1 F-body including a new flexplate, bellhousing, and TC that all linked up well. Still no luck with the trans. No forward or reverse movement, though the rpms change as if the trans is shifting correctly. I borrowed a really nice scan tool and found that the trans stays in 1st gear (or so it thinks) no matter what I do. the following DTCs are present:
P0713, P0740, P0758, P0785, P01860
I suspected the range selector, but the ignition does not switch to run unless the car is in park or neutral. I was also told that I should be able to manually shift it no matter what as long as the fluid was present and the pressure correct (no way for me to confirm the pressure, though)
I have also replaced the TCC solenoid and harness and 3-2 shift solenoid.
any and all suggestions/ ideas will be welcomed. Thanks!
TECH Fanatic
Joined: May 2010
Posts: 1,081
Likes: 8
From: Atlanta, Ga
If the LQ had a 4L80 behind it and you are using the LQ wiring harness and PCM you need to repin a few of the terminals on the trans end. If this is so I have the correct pinouts. This will not keep the car from moving however. I would do as ls1nova71 suggests and check fluid movement.
If the LQ had a 4L80 behind it and you are using the LQ wiring harness and PCM you need to repin a few of the terminals on the trans end. If this is so I have the correct pinouts. This will not keep the car from moving however. I would do as ls1nova71 suggests and check fluid movement.
If you had a V6 transmission and didn't use a .400" adapter ring, the front pump on the transmission is done because the torque converter didn't engage properly.
Update checked my continuity all looks good and all the pins are in the right spot, still no movement. Still have all of those codes, though. Issue must be mechanical. Guess I need to get it over to a buddy's shop, tired of struggling on the cold garage floor with only 12 inches of clearance. Thanks for the input guys. If you think of anything causing the electrical problems let me know. thanks again
