When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Recently car was running great so we took it to the dyno. Drove fine, dyno fine but when I got off the dyno, the car stayed in 4th gear on my 6L80E trans. Even with paddle shifters it wont move. We put the tune back to stock and nothing. We tried the tune i previously had and still no luck. I got the car home, looked under and noticed some burnt wires over the exhaust but it was dark to see where they went. Following day I had to leave out of town. There are NO CEL codes. Can anyone tell me what wires these are... this is where they burnt.. its a red wire a beige wire and a black wire that come from trans harness towards the back driver tire area.. trans temps stay 150s-170s.. not sure if the wires are brake related or speed related or trans related. The car is only 450hp area and trans has about 20k miles.. ls2 fbo cammed and 3600 stall.. like I said.. it worked perfect before and during dyno..
car
Recently car was running great so we took it to the dyno. Drove fine, dyno fine but when I got off the dyno, the car stayed in 4th gear on my 6L80E trans. Even with paddle shifters it wont move. We put the tune back to stock and nothing. We tried the tune i previously had and still no luck. I got the car home, looked under and noticed some burnt wires over the exhaust but it was dark to see where they went. Following day I had to leave out of town. There are NO CEL codes. Can anyone tell me what wires these are... this is where they burnt.. its a red wire a beige wire and a black wire that come from trans harness towards the back driver tire area.. trans temps stay 150s-170s.. not sure if the wires are brake related or speed related or trans related. The car is only 450hp area and trans has about 20k miles.. ls2 fbo cammed and 3600 stall.. like I said.. it worked perfect before and during dyno..
car
Going by those colors (Red/Beige/Black) and it's the Transmission Harness:
Out of the Transmission from the Control Solenoid Valve Assy you have:
Orange/Black > Park/Nuetral Signal to the ECM
Red/White > ECM/TCM 15A Fuse in engine compartment block
Going by those colors (Red/Beige/Black) and it's the Transmission Harness:
Out of the Transmission from the Control Solenoid Valve Assy you have:
Orange/Black > Park/Nuetral Signal to the ECM
Red/White > ECM/TCM 15A Fuse in engine compartment block
Black/White > Block ground
Tan > ECM/BCM Data Bus Neg
Tan/Black > ECM/BCM Data Bus Pos
If this helps
if those 3 wires were melted, do u think that could cause the trans to stay stuck in 4th gear. Im out of town so the car is parked. I havent checked for a blown fuse yet. Its just crazy that it worked perfect before dyno.
if those 3 wires were melted, do u think that could cause the trans to stay stuck in 4th gear. Im out of town so the car is parked. I havent checked for a blown fuse yet. Its just crazy that it worked perfect before dyno.
Did you get the problem fixed? If so please let me know because I’m having the same problem and no one can figure it out !!
Recently car was running great so we took it to the dyno. Drove fine, dyno fine but when I got off the dyno, the car stayed in 4th gear on my 6L80E trans. Even with paddle shifters it wont move. We put the tune back to stock and nothing. We tried the tune i previously had and still no luck. I got the car home, looked under and noticed some burnt wires over the exhaust but it was dark to see where they went. Following day I had to leave out of town. There are NO CEL codes. Can anyone tell me what wires these are... this is where they burnt.. its a red wire a beige wire and a black wire that come from trans harness towards the back driver tire area.. trans temps stay 150s-170s.. not sure if the wires are brake related or speed related or trans related. The car is only 450hp area and trans has about 20k miles.. ls2 fbo cammed and 3600 stall.. like I said.. it worked perfect before and during dyno..
car
Mine did the same thing after a burnout. Stuck in gear and no codes thrown. Sounds like "limp mode" but that should throw a code. Fortunately, mine was OK on the next ignition cycle. I assume you have tried disconnecting and reconnecting the battery.
Mine did the same thing after a burnout. Stuck in gear and no codes thrown. Sounds like "limp mode" but that should throw a code. Fortunately, mine was OK on the next ignition cycle. I assume you have tried disconnecting and reconnecting the battery.
Even though my problem "fixed itself" I did some investigating to try to find the cause. I was informed it could be the valve body and/or the Transmission Control Module (TCM).
09-03-2018, 02:34 PM
6L80E stuck in 4th gear
