trans issue

[tpbarnzy]

Not sure if this is the right forum but I have a trans issue. 08 1500 545RFE just quit working with no warning, was driving about 25 and it just stopped working. No forward or rev. No check engine light but my bullydog had 3 codes P0933, P0868, P0869. changed filters and pressure sensor. now it moves real slow only in low range. Any help would be greatly appreciated. Thanks.

 

[hemidup]

P0868 (Line Pressure Low) can be caused by something simple like low fluid level, or a loose / cracked / misinstalled filter. After that, likely a sticky main regulator valve (in the pump) or a worn pump. Could also be a bad line pressure control solenoid (part of the solenoid module), or bad wiring controlling it, or a bad TCM. Could also be a bad line pressure sensor (or associated wiring). So there are lots of possibilities. Since you've already replaced the obvious I'd heck your wiring for 5v signal and your grounds next.

 

[tpbarnzy]

Called the transmission shop today,they said it may be a plate under the valve body that's broken. Hope thats all it is