My 1995 Dodge Ram won't shift out of first gear,when it's put in 4wd.

no engine told. size, this tells what transmission sites behind it.
1999 Dodge RAM 1500????? not VAN. 1500
2wd or 4wd'/
5 engines. then.
check all fuses, some have stand alone TCM brain (tranny)
scan the PCM for P07xx error (tranny)
check ATF levels hot, park ,idle, only do not overfill it ever.
ATF+3 (not sure but do check)
they used 3 transmission then
4-speed 42RH-RE automatic
4-speed 46RH-RE automatic
4-speed 47RH-RE automatic

42RE , is electronic shifted,
OD gear is dead or just the TCC lockup deaD
best is count the gears more carefully to see truth.
yes 4th gear is OD Geared. 3rd gear is 1:1 lockup.
.74-to-1 for first, 1.54-to-1 for second, direct 1.00-to-1 for third and 0.69-to-1 for fourth.(OD)
scab the PCM
to see if errors from the transmission show up.
I bet they do.
the 3>4 shift solenoid must work, .and no pressure errors.
the schematics show an OD switch if not closed OD does not happen, forget about that switch>
if car is 4wd and is in 4wd, many cars/ and truck all shut off
OD in 4wd, by logic inside the PCM (pure) my not be true on the biggest engine not told.

I recommended checking fluid level in trans. first. If that's good try starting the vehicle and shifting from forward to reverse and giving it a couple seconds and either gear so that the trans can prime its self. Last resort drop the pan and put in a new filter and fluid.

Need to know what transfer case it has. Most t-cases have synchronized gearing...meaning shift on the fly. A quick test is drive at less than 5 mph, and shift, no gear clash means you have synchros. ****This is only from 2wd to 4 high. 4 low you MUST be stopped(doesn't matter what gear its in).****

my durango requires me to reverse several feet before it dis engages. i have owned a few and they all do it just back up and it will go back to 2wheel no problem

OK. MR. MORA. SEEMS TO ME THAT YOU HAVE A PROBLEM THAT YOU CAN SOLVE, DUE TO THE FACT THAT YOU REPLACED THE MOTOR YOURSELF. WHAT YOU WILL NEED TO DO IS GO BACK TO BASICS, BOTH VISUAL AND MECHANICAL, FIRST OF ALL LOOK FOR LOOSE OR UNPLUGGED ELECTRICAL CONNECTORS, ESPECIALLY THE ONES AROUND THE FIRE WALL OR BACK SIDE OF ENGINE. ONE OR TWO MAY BE OFF OR NOT CORRECTLY PLUGGED IN. NEXT DUE TO TRANSMISSION NOT SHIFTING OUT OF DEFAULT GEAR (SECOND GEAR) YOU WILL NEED TO RETRIEVE THE FAILURE CODES THEY SHOULD BE RELATED TO TRANSMISSION DESCRIPTORS, WRITE ALL OF THEM DOWN. ALSO LOOK FOR LOOSE GROUNDING WIRES AND GROUND THEM PROPERLY. I THINK YOU WILL FIND THE PROBLEM. IF NOT REPOST FOR MORE HELP BUT, REPOST WITH THE FAILURE CODES. I WILL NEED THEM TO HELP YOU FURTHER.

There are many things to consider with an automatic. Check that you have installed the kick down cable and spring correctly. If the kickdown is stuck or the spring is holding it in the wrong direction this will cause your problem. Insure your 8 pin plug is seated properly into into the sillinoid connector. Also check and see if any transmission codes have been set. Hope this helps.

2000 TOYOTA TACOMA 2.7L 4-cyl Engine Code 3RZ-FE

Engine Oil Grade 1......API* All TEMPS......5W-30 Optional ..10W-30
Engine, 2WD, with filter..........5.5 liters
Engine, 4WD, with filter..........5.4 liters

Manual Transmission,......GL-5/ GL-4 All TEMPS......75W-90
Automatic Transmission,A340E......AF3 / A43D......AF3

Differential, Front/ Rear W/ ADRD......GL-5 ALL TEMPS......75W-90
Differential, Front Less ADRD......GL-5 ALL TEMPS......80W-90

Transfer Case,......GL-4/GL-5 ALL TEMPS......75W-90 Gear oil.

Capacity:
Cooling System, Initial Fill..........8.5 liters
Automatic Transmission, A340E Initial Fill..........1.6 liters
Automatic Transmission, A340F Initial Fill..........2 liters
Automatic Transmission, A43D Initial Fill..........2.4 liters
Automatic Transmission, Total Fill
4 speed A340E..........7.2 liters
4 speed A340F..........10.1 liters
4 speed A43D..........6.5 liters
Manual Transmission, ..........2.5 liters
Differential, With ADRD Front..........1.2 liters
Differential, Without ADRD Front..........1.1 liters
Differential, 2WD V6 Rear..........2.6 liters
Differential, 4WD Extra Long Rear..........2.5 liters
Differential, Short WB With LSD Rear..........2.7 liters
Differential, Short WB Without LS Rear..........2.6 liters
Transfer Case, Electronic..........1.2 liters
Transfer Case, STD..........1 liters

these go bad alot. your sun shell is probaly cracked. get a rebuilt trans and install your self to savre $$$ or have a shop do it for you $1600 or so.

Have someone scan the transmission for bad shift sensors.