Hello,
This is my first post here so I am still getting aquatinted to the forum. I hope you all have had a good New Years!
I have a 2004.5 LLY with 278k, ECSB. It’s a stock tune truck with an Allison Retran, about 160k put in by the previous owner. To be honest, I think I have two issues going on with the truck. I have been dealing with poor top end power and low fuel mileage at highway speeds (13 unloaded).
A few days ago I was making a turn and my RPM’s free revved like the trans had slipped, so I pulled over with an immediate CEL. I noticed smoke coming from the hood. What I found was the lower line separated from the fitting on the trans cooler and I had Transynd all over the ground - no fluid on the stick. Truck ran for approx 30 seconds this way while pulling over. The code it threw was P0700.
A couple days later my FIL pulled the code for me and it is P0841 - “Transmission Pressure Sensor/Switch circuit ‘A’ Performance”.
We reconnected the line, it seemed seated, added 2 gal of Castrol Transyn 668, and changed the spin on. The magnet had a light gray coating on it, nothing out of the ordinary, fluid was nice and red. He said the fluid smelled burnt, but weirdly. Like it had a gear oil smell to it. Didn’t smell like fresh fluid to me but still had that… detergenty smell to it?
Took it for a test drive, shifted smooth, and the TC locked up. On the way back it blew the line again and when pulling over (drove it for a minute this way, it revved like it did before but slammed gears twice. Same issue as before.
Any ideas on why the line would have popped?
Is it possible I damaged my transmission with the hard shifts?
Would the solenoid code be caused by low fluid, or is it faulty? Before the second drive the code didn’t want to clear out, but he did test the solenoid operations with his scanner and they seemed to function (A, B, C, and D circuits).
Any help would be greatly appreciated.
This is my first post here so I am still getting aquatinted to the forum. I hope you all have had a good New Years!
I have a 2004.5 LLY with 278k, ECSB. It’s a stock tune truck with an Allison Retran, about 160k put in by the previous owner. To be honest, I think I have two issues going on with the truck. I have been dealing with poor top end power and low fuel mileage at highway speeds (13 unloaded).
A few days ago I was making a turn and my RPM’s free revved like the trans had slipped, so I pulled over with an immediate CEL. I noticed smoke coming from the hood. What I found was the lower line separated from the fitting on the trans cooler and I had Transynd all over the ground - no fluid on the stick. Truck ran for approx 30 seconds this way while pulling over. The code it threw was P0700.
A couple days later my FIL pulled the code for me and it is P0841 - “Transmission Pressure Sensor/Switch circuit ‘A’ Performance”.
We reconnected the line, it seemed seated, added 2 gal of Castrol Transyn 668, and changed the spin on. The magnet had a light gray coating on it, nothing out of the ordinary, fluid was nice and red. He said the fluid smelled burnt, but weirdly. Like it had a gear oil smell to it. Didn’t smell like fresh fluid to me but still had that… detergenty smell to it?
Took it for a test drive, shifted smooth, and the TC locked up. On the way back it blew the line again and when pulling over (drove it for a minute this way, it revved like it did before but slammed gears twice. Same issue as before.
Any ideas on why the line would have popped?
Is it possible I damaged my transmission with the hard shifts?
Would the solenoid code be caused by low fluid, or is it faulty? Before the second drive the code didn’t want to clear out, but he did test the solenoid operations with his scanner and they seemed to function (A, B, C, and D circuits).
Any help would be greatly appreciated.
