Archived Stuck in 1st

[Zapsurf]

My 99 Turbo Diesel 3500 would only shift to 2nd if I let off the accelerator. Now its stuck in 1st. I changed the trans output speed sensor, no luck. I pulled a code of 1740. Could it be the governor regulator/pressure switch and how hard is that to change? I also pulled the codes po336-CPK and po-121 APPS. Help zapsurf,Fallbrook,Ca.

 

[Missouri Mule]

Code 1740 is for Torgue convertor clutch or Od solenoid performance. Sounds like ot Torque convertor clutch bit the dust and mite be thru out your trans ( that is what usually happens).



I would made a guess and said you need to adjust your bands (rear).

I woud check your trans fluid for any clutch material.

 

[CSnyder]

Call Goerends 563-778-2719

 

[DieselLady]

Gov pressure solenoid is not hard to change. Drop Pan and access on Valve body. But you can get it diagnosed at most trans shopes with a line pressure gauge first.

 

[BSMcCauley]

My '96 had that problem a short time ago. :{ I dropped the transmission pan en-route to troubleshooting the governor solenoid and discovered a loose part in the bottom of the pan. The front band adjustment had been loose enough to allow the part that supposed to be between the end of the band and the adjustment screw to fall out. Like you, I could play with the accelerator and eventually get it to shift out of 1st, but since it could never go into 2nd, the transmission was apparently skipping 2nd and going directly into 3rd.



I pulled the valve body down to gain access and put the piece back into place and adjusted the band properly (consult your shop manual, but for 47RE in my '96 it is snug the adjustment down to 72 in-lbs and then back off 2. 5 turns) and haven't had another problem. :-laf I'll attempt to attach pictures... PM me if you want higher resolution on any of these.

View attachment 70428



View attachment 70429



View attachment 70430



View attachment 70431

 

[DieselLady]

My '96 had that problem a short time ago. :{ I dropped the transmission pan en-route to troubleshooting the governor solenoid and discovered a loose part in the bottom of the pan. The front band adjustment had been loose enough to allow the part that supposed to be between the end of the band and the adjustment screw to fall out. Like you, I could play with the accelerator and eventually get it to shift out of 1st, but since it could never go into 2nd, the transmission was apparently skipping 2nd and going directly into 3rd.



I pulled the valve body down to gain access and put the piece back into place and adjusted the band properly (consult your shop manual, but for 47RE in my '96 it is snug the adjustment down to 72 in-lbs and then back off 2. 5 turns) and haven't had another problem. :-laf I'll attempt to attach pictures... PM me if you want higher resolution on any of these.

View attachment 70428



View attachment 70429



View attachment 70430



View attachment 70431

Funny thing is, mine did the same thing. But the band adjuster fell off when I put it into park as I was arriving home from Colorado to Calif. Couldn't get it to go into park. Drove great shifted and all. Just no park. Dropped the pan and valve body and kerplunk it fell into the drain pan. Put it all back together and adjusted it and it works better than ever. :-laf