Just picked up a 2002 dodge dakota 3.9 4wd with 90k miles on it When i put it in drive it feels like it slips but when i put it in first and second manually it works fine what can cause this?

 

1st-manual and 1st-drive use different activation circuits.

Screenshot2014-10-18at104716PM.png

 

actually now that i messed with it seams like its in limp mode and starting in the wrong gear when i put it in drive the guy i got it from said it was the pressure sensor but not sure if it would do this? also i have seen people say that the oil pickup in the trans fell off would it cause this?

 

Now im getting code p1762 what does it mean?

 

P1762 - Gov Press Sen Offset Volts Too Lo or High

The Governor Pressure Sensor input is greater than a calibration limit or is less than a calibration limit for 3 consecutive park/neutral calibrations

 

if i replace the sensor i should be good right? or is there something else that causes this?

 

Not necessarily. It can be a wiring issue as well. Do you have a meter?

Make sure the PCM connectors are clean and tight. Then check for 5 volts at pin 2, should be the violet with white tracer wire on the transmission - it should be 4.8 to 5.5 volts.

Check the sensor output too. With the ignition on, truck NOT running, you should have less than .5 volts at pin 4

Turn the key OFF.

Check between ground and transmission harness connector pin 4. It should show more than 100k ohms resistance - this checks for signal and short to ground.

Between pins 2 and 3 on the harness connector you should have more than 100k ohms - this checks sensor signal and 5 volt supply for shorts.

There are other tests but you need a gauge on the transmission and access to the data from the transmission sensors.

 

Yea i have a meter guess i will have to drop the pan to get to the connector right? or is there one up top somewhere?

 

The harness going to the transmission has a connector.

 

The Governor pressure solenoid and pressure transducer are both easily replaced in you driveway and are recommended to be replaced on these transmissions every 75,000 miles. It requires removing the transmission pan. So while you are at it, buy a new gasket, new filter, and at least 10 quarts of tranny fluid. Also, while you are under there with the pan removed you should adjust the rear band (requires an inch-pound torque wrench). The front band can be adjusted outside the transmission. Both get torqued to 70 inch pounds and then backed off 2-7/8 turns. When replacing the governor solenoid upgrade to the Heavy Duty Borg Warner unit. It's actually cheaper than the OEM and is WAY BETTER/Bigger. Cascade Transmission offers all of the above at a reasonable price and they have U-tube videos on how to replace the solenoid and the pressure transducer.

If it were me, I would go one step further while I had the pan off and do the shift improver upgrade. The kit cost about $60.00. The part number is K500-618-L from Shift Technology Products. It's supposed to eliminate that funky 2-3 upshift at part throttle that's annoying as hell and make all shifts firmer/faster.