trans is huning in all gears and tq. lock up freaking out, TSP rang is from .36 to 3.89 I was thinking is was it should be around 4.5 at full throttle? new pressure regulator and transducer in trans.

 

huh!!!!!!!!!!!

 

sorry, went to a california school, transmission is HUNTING 1-2 2-3-2 2 lock up, un lock, 1st to 3rd lock up, like someone is playing musical gears in the tranny

 

Instructions:

Tools: Digital Volt Meter, T-20 Torx bit, #1 phillips, 10mm socket

With the key on, engine off you need to probe the APPS wire to see where the voltage is currently set at.
The best location to probe the wire is on the PCM (Power Control Module) which is located on the passenger firewall behind the air intake.
You want the C1 connector, this is the connector closest to the engine
You want the orange wire with a dark blue tracer which is pin #23
Voltage should be somewhere around 0.5 volts,
At this point the voltage reading does not matter, it just has to be accurately written down for later reference
TURN THE IGNITION OFF ON THE TRUCK

Remove the black plastic cover off of your APPS. There are two plastic screws. One on the top and one on the front facing the radiator. It takes a little prying to pull it off.

Undo the 6-10mm bolts that hold the bracketru in place but DO NOT REMOVE THE CABLES!!

You will notice the APPS is on the back of the bracketry that you just removed, it is held in place by 2-T20 torx bit screws. These screws have a little bit of locktite on them so make sure you have a good socket and gently give a little tap with a hammer before attempting to loosen. Be very careful because these screws strip VERY easily and you only get one shot at them (VERY VERY VERY IMPORTANT; They are VERY tight).

On the APPS you will find a white tag that gives you the information on what the APPS voltage should be.
After loosening the screws (do not remove) you can rotate the APPS clockwise or counter clockwise to get the adjustment (towards the front of the truck increases voltage and towards the rear of the truck decreases voltage)
The reading you took at the beginning of the process on pin #23 should match the white tag on your APPS. If it doesn't the adjust accordingly.


Keep in mind, if the APPS is wore out, it'll fall out of adjustment. If that's the case, need to replace it.

 

Trans fixed, to all that have a transmission hunting gears and tq lock un lock, here is what i found, read on here about bad grounds, well i cleaned the batterys and did the frame and body grounds and ran a 14 G. wire from computer ground to battery ground. night and day difference. like a new truck again.

 

If it acts up again do the wiring bypass from the Apps to the computers, Diagram available from a guy on this site. Also always keep those terminals clean and reset the apps each time after disconnecting for several hours. Shifting from first to second hesitation is often the solenoid in the Trani.