Just bought a 2003 F350 with 102,000 miles on it. Truck runs great motor wise, when you drop it in to Reverse or Drive it sorta jumps then kills the truck. Any thoughts? I knew this when I bought the truck.

 

My first thought is, "I wonder what transmission we are talking about." There were two automatics in 2003, the 4R100 with the 7.3L and gas engines, and the TorqShift with the 6.0L engine.

Either way it could easily be low trans fluid. A loose/missing internal filter could do this, along with internal leakage or a worn pump.

 

My bad,I just took for granted that since I posted in the 6.0 forum everyone would take it that it was a 6.0........ Yes it is a 6.0 with a torque shift transmission....Fluid appears to be good on the dipstick, doesn't look dark or smell abnormal.....

 

If you read new posts, which I sometimes do, I don't know which forum a post is located in.

Since the fluid level is good the next step is to check line pressure. There is a port on the driver's side of the trans, just above the pan, towards the front of the trans. It has a black hex head plug in it from the factory. Get a 0-350 PSI gauge with a 1/8" NPT thread and measure the pressure with the shift lever in each gear. In drive and reverse also check it with the go pedal on the floor. DO NOT hold the pedal on the floor longer than 5 seconds, with at least 30 seconds in neutral right after.

 

Mark,

Very interesting. What numbers should you see in this process to validate one way or the other?

 

5R110 Pressure Chart:
Line Pressure - Idle
P,N - 50 psi
R - 100 psi
D - 70 psi
3 - 80 psi
2 - 80 psi
1 - 80 psi

There are WOT stall numbers also:
R - 320 psi
D - 320 psi
3 - 260 psi
2 - 215 psi
1 - 270 psi

 

The only thing is when I shift into gear it kills the motor..... Will I still be able to get a reading???? Has about 2 maybe 3 seconds before it shuts off....

 

Sounds more like an engine issue. Tranny shouldn't kill the engine unless it can't run with the normal torque converter tension.

Are you pulling any engine codes?

 

Pulling : U1059, P1832, P1876

 

All transmission circuit codes, but I don't know what them mean. I bet Mark K. can give us an interpretation though.

 

P1832 transfer case Differential lockup solenoid circuit failed & P1876 transfer case 2-wheel drive codes solenoid circuit failed.

U1059 - SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL

So I see two transfer case codes and one code that there is a data error between the engine and transmission CPUs inside the PCM.

I think you need to install a gauge and see what the pressures are doing.

 

Hope to do by this afternoon...

 

Well I got out playing with the truck shifting it from D to N to R, leaving it in gear just till truck was about to die and then would go to N. Did this four or five times then noticed it kept getting longer and longer each time, till she started moving, been driving around farm last 20 mins or so... Think i will pull cover and change filter and fluid for sure....

 

Below is what I found when I dropped the pan.....

 

That doesn't look bad.