Allison 5sp: hey im new to this forum have some questions on my lb7

[Trevor lb7]

my question is I bought a built ppe trans stage 4 with a suncoast vb and triple disk converter, and the truck will not go in gear? trans has 0 miles on it, I put a new neutral safety switch in that didn't help also an ignition switch didn't help and then a internal wiring harness. still doesn't go in gear, before I replaced the harness the truck would move in 3rd and reverse w the harness unplugged after new harness I have nothing not even w harness unplugged/ I also rplaced the trans cooler and the tranny lines. and now I cant pull any codes/ any help would be very well appreciated thanks.

 

[Trevor lb7]

also the truck is an 04 lb7, it has efi n some other stuff but idk if the matters

 

[THEFERMANATOR]

If it won't move with the harness unplugged, you have an internal problem. Make sure it is full of fluid FIRST! If it is then you need to drop the pan and make sure the filter is all the way into the seal. If the filter is in place, and it doesn't move, then it sounds like a messed up build, probably has the pump gaskets messed up.

 

[Trevor lb7]

Yeah I'm guna try that tomorrow after work it may of ame down a bit when I pulled the flui out to do the harness thought it seemed fine I looked at it when I ha the pan off and every thing else is spot less and looks brand new Illini outlaw diesel built it! Before I changed the harness it was throwing all kinds of trans electrical codes! Just seem weird that it worked before that harness w it unplugged seems like it's gota be that filter or sumthing stupid I'm missing!

 

[Trevor lb7]

Also when I put the fluid back in I checked it after it ran for awhile and it wasn't warm by any means and the fluid was at the full part on the hot side? Could to much fluid cause the trans to go into shift range inhibited because that's what it said?