Should I be concerned about these codes? I have cleared the check engine codes once. Sensors can go bad for a number of reasons. At 75000 miles the gear failed in a parking garage when I parked my truck I had appox. . I guess people have to die in order for a recall to be made by general motors.
These codes are present codes. I only have 42000 miles on the truck. The transfer case was rebuilt because I had a problem with the Tcase not wanting to go into 4x4. Truck runs fine and shifts great. However, consumer was told there was nothing they could do.
No lights come on and it runs great. Personally - I would never, ever recommend buying a vehicle from out of State. I know that you can limp the allison transmission if you put that much power to it. Try putting the transmission in neutral at around 25 mph. The truck is used to pull my car trailer a few times a year.
These codes seem to appear after the truck has sat for a week or two. Code 875 is reverse pressure switch problem Code 875 is presure switch C problem. Pressure switch assembly will be on valve body. Thought it would be the same for the 8. These codes are present codes. My codes are back again.
I had to have my transmission rebuilt and the transmission shop said that it was a common problem. Because this is a relatively 'high pressure' spin-on filter, it is important to tighten the filter one full turn after the gasket contacts the transmission case. After a detailed investigation, I have discovered that this is a common problem with this particular transmission, as they have corrected it on the 2003 models. It has the 8100 engine and the truck has 42K on it. I will never go back to a 4L80E trans again.
No lights come on and it runs great. The 450 hp isn't killing the trans, the insane torque is. This happened around August 4, 2005. Keep in mind that these transmissions are designed to run at a maximum temperature of 200 degrees. The also load their vehicle with more payload than is recommended. No repairs were performed by the dealer due to the extensive work and expense.
As far as being in a pickup, I have never seen an Allison behind a 6. The 4L80E's are beefier internally than the lighter duty 4L60E's 4L65E. It has the 8100 engine and the truck has 42K on it. Maybe the solution is to just drive the truck more often! B38 I just bought a new used 2002 chevy with 8. Good Luck and let us know how it goes. The allison is one smooth shifting transmission though. New ball joints and such in front end about 10,000 miles ago.
Overheating is usually caused by the vehicle owner. Truck runs fine and shifts great. However, it has repeated this scenario 3 times on the same road home when there was a bit of an incline where I slow down for an upcoming curve just slowed down without putting on the brake and with the foot on the throttle slightly. Also, there is a removable magnet between the filter and the transmission housing; care needs to be taken that the magnet doesn't get 'thrown away' with the old filter if it happens to stick to the old filter. There is a technical bulletin on this matter. The Diesel excursion is about twice the coin for comparable age vehicles.