I got this yesterday when I started back up. I am going to try and get codes tonight. However this is whats happening. When from park and put into R it slowly grabs then seems to lose movement. I can go back to park and into R again same thing. Then when going forward it will shift but it seems to take along time getting into next gear. and wont go past 3rd or 4th cant remember. When in gear it seems fine. I looked it up on here and came to a conclusion that it could be NSBU or the pressure solinoid. It was rebuilt like 10k with no problems. Im just stumped and it seems electronic. Any help would be appreciated. Thanks
Allison 5sp: Range Shift Inhibited
- Thread starter rawwalk
- Start date
Get some real codes with a professional scanner. Need to know exactly what was done to the trans right down to the pan. If you leave any info out no matter how trvial, I can't help you.
The codes were.
P0780-- Shift Malfunction
P0781-- 1-2 Shift Malfunction
P0782-- 2-3 Shift Malfunction
P0783-- 3-4 Shift Malfunction
And there was a a TCM communication code I think, cant remember the number.
the trans was rebuilt using a transgo pump kit/shift kit. We used raybestos clutches and steels, I am running a 5 star converter. and like I said it was working great no problems untill now, and I have never changed the NSBU. I talked to Wade and I am going to switch that anyways and see. However I hope thats it.
P0780-- Shift Malfunction
P0781-- 1-2 Shift Malfunction
P0782-- 2-3 Shift Malfunction
P0783-- 3-4 Shift Malfunction
And there was a a TCM communication code I think, cant remember the number.
the trans was rebuilt using a transgo pump kit/shift kit. We used raybestos clutches and steels, I am running a 5 star converter. and like I said it was working great no problems untill now, and I have never changed the NSBU. I talked to Wade and I am going to switch that anyways and see. However I hope thats it.
Those codes indicate a shift malfunction on every single shift. Never seen that before. I would suspect eletrical problem or TCM.
The communication code is what I'd be looking at. Should have been a U code. Done any recent offroading, or puddle jumping? maybe driving in some real heavy rain?
Sounds like something is causing an interruption in communication between the TCM and tranny itself. Not that it needs to be said, but obviously if they cant commincate (damaged tcm, broken wires) then you are going to get a slew of other codes as a result.
Sounds like something is causing an interruption in communication between the TCM and tranny itself. Not that it needs to be said, but obviously if they cant commincate (damaged tcm, broken wires) then you are going to get a slew of other codes as a result.
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