96 Dodge shift code

My 96 Dodge 3500 has never shifted into high range. While at the shop they found a 3-4 shift solenoid problem, while doing a scan of the computor. Is this the problem why my truck is not shifting into high range? If so, is this solenoid easly replaced? Which one is it? I think there are three under the pan. Thanks for the info. Stan

Could be the shift solenoid, could be a connector, could be the wiring, could be the triac that energizes the shift solenoid in the engine control module. Could also be a stuck valve in the valve body so it doesn't move even though the shift solenoid works. Most likely the solenoid itself. There should be power on one side of the shift solenoid all the time. When the opposite side is grounded the solenoid changes state.

Are you saying the truck has never been in high gear?

is it a 47re ? is it the same tranny as the diesel ? the procedure for a 47re is the following :
No upshift to fourth gear will occur if any of the following
are true:
² The transmission fluid temperature is below 10°
C (50° F) or above 121° C (250° F).
² The shift to third is not yet complete.
² Vehicle speed is too low for the 3-4 shift to occur.
² Battery temperature is below -5° C (23° F).
ADJUSTMENT
Check linkage adjustment by starting engine in
PARK and NEUTRAL. Adjustment is acceptable if
the engine starts in only these two positions. Adjustment
is incorrect if the engine starts in one position
but not both positions
If the engine starts in any other position, or if the
engine will not start in any position, the park/neutral
switch is probably faulty.
LINKAGE ADJUSTMENT
Check condition of the shift linkage (Fig. 222). Do
not attempt adjustment if any component is loose,
worn, or bent. Replace any suspect components.
Replace the grommet securing the shift rod or
torque rod in place if either rod was removed from
the grommet. Remove the old grommet as necessary
and use suitable pliers to install the new grommet.
(1) Shift transmission into PARK.
(2) Raise and support vehicle.
(3) Loosen lock bolt in front shift rod adjusting
swivel (Fig. 222).
(4) Ensure that the shift rod slides freely in the
swivel. Lube rod and swivel as necessary.
(5) Move transmission shift lever fully rearward to
the Park detent.
(6) Center adjusting swivel on shift rod.
(7) Tighten swivel lock bolt to 10 N·m (90 in. lbs.).
(8) Lower vehicle and verify proper adjustment.
SOLENOID
DESCRIPTION
The typical electrical solenoid used in automotive
applications is a linear actuator. It is a device that
produces motion in a straight line. This straight line
motion can be either forward or backward in direction,
and short or long distance.
A solenoid is an electromechanical device that uses
a magnetic force to perform work. It consists of a coil
of wire, wrapped around a magnetic core made from
steel or iron, and a spring loaded, movable plunger,
which performs the work, or straight line motion.
The solenoids used in transmission applications
are attached to valves which can be classified as normally
open or normally closed. The normally
open solenoid valve is defined as a valve which
allows hydraulic flow when no current or voltage is
applied to the solenoid. The normally closed solenoid
valve is defined as a valve which does not allow
hydraulic flow when no current or voltage is applied
to the solenoid. These valves perform hydraulic control
functions for the transmission and must therefore
be durable and tolerant of dirt particles. For
these reasons, the valves have hardened steel poppets
and ball valves. The solenoids operate the valves
directly, which means that the solenoids must have
very high outputs to close the valves against the sizable
flow areas and line pressures found in current
transmissions. Fast response time is also necessary
to ensure accurate control of the transmission.
The strength of the magnetic field is the primary
force that determines the speed of operation in a particular
solenoid design. A stronger magnetic field will
cause the plunger to move at a greater speed than a
weaker one. There are basically two ways to increase
the force of the magnetic field:
² Increase the amount of current applied to the
coil or
² Increase the number of turns of wire in the coil.
The most common practice is to increase the number
of turns by using thin wire that can completely
fill the available space within the solenoid housing.
The strength of the spring and the length of the
Fig. 222 Linkage Adjustment Components
1 - FRONT SHIFT ROD
2 - TORQUE SHAFT ASSEMBLY
3 - TORQUE SHAFT ARM
4 - ADJUSTING SWIVEL
5 - LOCK BOLT

I use the truck only to haul my tractor. I just drive in the slow lane on the freeway, no need to try to keep up with the idiots on the road. I drive like a old man. Hay, I am, I will be 70 in a couple days. It has never been in the higher range, since I owned it. The truck only gets a little over a thousand miles a year anyway. Stan

I knew someone that burned up a transmission that way once, he ran it on the highway for extended periods. That is why it surprised me.

It's not like I'm driving around in low range. I start out in drive it shifts twice, the next shift I think should be around 50-55. It never shifts at that speed. If I drive around 50-55 I don't think there will be a problem. Now if I was driving at 65-70 that may be a problem? Stan

Plus the compuker, dirt,and about another 10 things that I don't remember about them damm dodge's have one here that some times shifts on it's own, other times I have to move the lever from 1st,2nd. 3rd. I gave up on it after 600.00 dollars and 6 months time, just going to fix the other stuff and sell as is.

We replaced quite a few shift solenoids. Common problem. I believe they come as a two solenoid assembly. Make sure from a diagram of the valve body you change the correct pair since the other shift solenoids look the same. Gerard

(quoted from post at 15:35:26 06/30/12) We replaced quite a few shift solenoids. Common problem. I believe they come as a two solenoid assembly. Make sure from a diagram of the valve body you change the correct pair since the other shift solenoids look the same. Gerard

Click to expand...

I second that,,, also I scope all TPS sensors when I have issues with goats...
The TPS has bitt me bad a few times...