Question about 1986 Toyota Pickup 4WD

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1994 22re 4x4 problem

4x4 will not engage, shifter on transfer case moves smoothly but will not engage front wheels. Also 4x4 indicator light comes on for a second then goes out.

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  • Anonymous Mar 12, 2014

    What kind of oil for a transfer case do I use for a 94 toyota pick up. 22re 4x4 pick up

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Your transfer case is not working properly, try this trick, shift into 4wd and gently back up the car and go forward and back up again wait for the indicator light to come back again, goodluck, otherwise you need to have those transfer case checked and maintained, have those front hubs checked and maintained too. Its would be better to use your 4WD more often. Try this trick not on a paved road pls.

Posted on Nov 25, 2008

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When switching to 4x4 high, it engages but the indicator light does not come on. When starting the vehicle, the light comes on. Is it something in the switch? If so, can I fix it easily?


Operationally vacuum holds the IWE ( Integrated Wheel Ends ) out, and once vac is removed the spring engages the IWE.

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

- If the front drive shaft does not turn :
Shut of the truck ( still jacked up, and supported ) remove the vac lines from the IWE. The spring should push the gears in, without the vac line on.
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I am suspecting ( read - guessing ) that the front drive shaft will not turn, and you are having an issue with the transfer case shift motor.
Check the connector on the transfer case to make sure the pins are clean and it is fully together. At the same time check the fuses for the 4x4 operation.
If both of these are good, try tapping on the back of the transfer case with a dead blow mallet while someone turns the switch from 2H to 4H and 2H to 4L

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Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

I am going to guess the drive shaft will not turn, and the problem is the shift disconnect motor on the front axle, or the shift solenoids.
The shift motor looks like this
37bcd6a.jpg

The shift solenoids look like this :
1a11fc1.jpg

You can check the shift solenoids with a vacuum gauge. The blue vacuum line is the 4WD operation, the pink is the 2WD operation. Pull the vacuum line at the shift disconnect motor, and install the vacuum gauge. Shift into 4WD and the vacuum should be on the line, and hold. If not could be the disconnect motor or the vacuum line to the motor.

Could also be the shift motor in the transfer case, but with the 4x4 light on the cluster lighting up, the transfer case should have shifted, the confirm comes from the transfer case to illuminate the 4x4 indicator on the cluster.

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if wheel turns freely the front axle or transfer case is not engaged
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if the driveshaft will not spin the transfer case is engaged properly
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if no vacuum measured look for vac leak or bad vac switch
if both lines have vac look for a bad vac swithc or ruptured cad actuator diaphragm
if one line has 20" +- VAC
move transfer case lever to 2wd measure vac again lines should have swapped vac signals
if no vac switch bad or 4wd shift likage needs adjusting
if yes vac motor bad or stuck or shift fork stuck
remove vac shift motor from the axle attach vac lines to shift motor engage disengage 4wd
does shift motor plunger move at least 1/2 inch
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