Limped the transmission today with the codes:
P0700- general trans malfunction
P0751- 1-2 shift solenoid
P0762- 4-5 shift solenoid
P0873- Trans fluid switch 3
P0877- Trans fluid switch 4
FWIW, on tune 4 with the 07 LBZ in the sig I was accelerating from a stop merging when this happened.
I did a search and it seems like the most probable cause was low fluid (which makes sense when you read below).
Background: Transmission is stock with 194k miles. Only 2000 miles have been with the mods, the other 192k it was stock. I replaced the transfer case yesterday since the previous one was of victim of pump rub and trashed everything. A few weeks ago before I noticed the hole in the tcase, the truck did a harsh 1-2 shift in the morning and didn't do it again. I attributed it to the transfer case but then it happened again this morning.
Once I checked the codes and cleared them I went home and checked the fluid. It was up to the cold level on the dipstick. I crawled underneath the truck and the transfer case wasn't leaking anywhere, not at the trans gasket or output seal. However, I noticed what looks like trans fluid on the lip of the bell housing and a spot or two on the front driveshaft (which had none on it the day before). I pulled the inspection plate because there was some fluid by it but everything inside looked dry and seems to have gotten on it from externally of the trans.
A few thoughts I had, there has been an issue with the trans all along in addition to the transfer case being bad. The harsh 1-2 shift in the morning was caused by the fluid being cold/low. As for the fluid spraying, one explanation could be that I overfilled the tcase a little and it is coming out of the breather or worse the trans is leaking into the tcase and filling it up.
Any ideas? Thanks.
P0700- general trans malfunction
P0751- 1-2 shift solenoid
P0762- 4-5 shift solenoid
P0873- Trans fluid switch 3
P0877- Trans fluid switch 4
FWIW, on tune 4 with the 07 LBZ in the sig I was accelerating from a stop merging when this happened.
I did a search and it seems like the most probable cause was low fluid (which makes sense when you read below).
Background: Transmission is stock with 194k miles. Only 2000 miles have been with the mods, the other 192k it was stock. I replaced the transfer case yesterday since the previous one was of victim of pump rub and trashed everything. A few weeks ago before I noticed the hole in the tcase, the truck did a harsh 1-2 shift in the morning and didn't do it again. I attributed it to the transfer case but then it happened again this morning.
Once I checked the codes and cleared them I went home and checked the fluid. It was up to the cold level on the dipstick. I crawled underneath the truck and the transfer case wasn't leaking anywhere, not at the trans gasket or output seal. However, I noticed what looks like trans fluid on the lip of the bell housing and a spot or two on the front driveshaft (which had none on it the day before). I pulled the inspection plate because there was some fluid by it but everything inside looked dry and seems to have gotten on it from externally of the trans.
A few thoughts I had, there has been an issue with the trans all along in addition to the transfer case being bad. The harsh 1-2 shift in the morning was caused by the fluid being cold/low. As for the fluid spraying, one explanation could be that I overfilled the tcase a little and it is coming out of the breather or worse the trans is leaking into the tcase and filling it up.
Any ideas? Thanks.
