Question about 1988 Ford Bronco II

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88 Bronco ii won't shift into 4 wheel drive.

My 88 Bronco ii has automatic 4 wheel drive. I suspect the shift select motor on the Transfer Case. Anyone suggest otherwise? I figured I could pull in off the tranfer case, leave plugged in electrically and see if it works. Good? No Good?

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  • broncitis Dec 27, 2008

    have an '89 Bronco II that won't shift into 4 wheel dr. Light did illuminate (now does not), so I have nothing. Would hear clicking sound underbelly when it tried to engage.

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Check to see if you are getting power through your switch on your dash. I also suspect your shift motor but it is a lot easier to check it with a test light.

Posted on Sep 12, 2008

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4 wheel drive won't engage


Which do you have ?
Transfer Case - NVG 236 (Two Speed Automatic)
Transfer Case - NVG 233-NP1 (Two Speed Selectable)
The NV236 transfer case is an automatic transfer case with three drive ranges. Shifting from rear wheel drive to four wheel drive is done automatically when the transfer case shift control module receives wheel rotating slip information from the speed sensors. The transfer case shift control module then engages the transfer case motor/encoder to position the transfer case from rear to four wheel drive. When the transfer case shift control module receives information that the wheel rotation is the same on both axles, the transfer case shift control module sends position information to the motor/encoder to put the transfer case back into rear wheel drive. The three drive ranges are 2HI, 4HI, and 4LO. The 2HI position is for normal driving with the rear wheels pushing the vehicle. The 4HI, position is for driving through sand, snow, mud, gravel, or heavy rain at normal or slightly below normal speeds. The 4HI engages the front axle to allow for four wheel drive. The front axle is pulling the vehicle, and the rear axle is pushing the vehicle. The 4LO range is used for off road driving, heavy snow, deep mud, or shallow fording. The 4LO is similar to the 4HI except that the gearing in the transfer case is set for low speed and high torque. The NV236 is manufactured at Syracuse New York by New Venture Gear a division of New Process Gear for General Motors.
Is the switch light on or flashing ? If you have automatic 4x4 there are several DTC'S that can set >
DTC B2725 ATC Mode Switch Circuit Malfunction DTC C0300 Rear Speed Sensor Malfunction DTC C0305 Front Speed Sensor Malfunction DTC C0308 Motor A/B Circuit Low DTC C0309 Motor A/B Circuit High DTC C0310 Motor A/B Circuit Open DTC C0315 Motor Ground Circuit Open DTC C0323 T-Case Lock Circuit Low DTC C0324 T-Case Lock Circuit High DTC C0327 Encoder Circuit Malfunction DTC C0362 4LO Discrete Output Circuit High DTC C0367 Front Axle Control Circuit High DTC C0374 General System Malfunction DTC C0376 Front/Rear Shaft Speed Mismatch DTC C0387 Unable to Perform Shift DTC C0550 ECU Malfunction DTC C0611 VIN Information Error

Dec 01, 2015 | 2000 Chevrolet S-10

1 Answer

89 bronco ii won't go into 4x4 or low range


ON LEVEL GROUND
With the transmission selector in "park", start the motor.
With your foot on the brake pedal (steady-constant pressure), move the transmission selector gear to neutral- then turn the 4 X 4 selector knob to 4-wheel drive high. Wait for the 4 X 4 engagement.
Once it is in 4-wheel drive high, with the transmission selector still in neutral, quickly pump the brake peddle twice, keeping you foot on the brake pedal on the second pump, turn the 4 X 4 selector knob from high range to low range. The transfer case should then change from 4-wheel drive high to low.
Electronics being what they are, you sometimes have to repeat the process. You may even have to inch forward or backward.
[I have an '01 Excursion and an '05 F250 with 4 X 4 on the fly...I miss my '97 F250 with the manual 4 X 4 shift on-the-floor!]
Anyway, check the fuse panel for any blown fuses.
Double check to make sure that the problem is not just blown 4 X 4 lights on the instrument cluster. With the nob turned to 4-wheel drive, have a second person- a spotter, check to see if the drive shaft to the transfer case is moving. If it isn't, you have to delve into the troubleshooting process.
Check the solenoids, vacuum hoses, vacuum actuator, and transmission range sensor on the transfer case. .

Nov 27, 2013 | 1989 Ford Bronco II

1 Answer

Help? Suddenly my 1987 bronco II manual trans 4 wheel drive will not move in any gear.


First, did you check on the driveshaft? It's not dropped or has a broken U-joint and/or yoke? Will the truck move in 4WD? If so, the problem lies with the drivshaft and rear end. If not, then the problem lies in the transmission and transfer case. Can you shift gears while the engine is running without them grinding? If so then the clutch assembly is good, otherwise you need to look there.

Oct 20, 2013 | 1987 Ford Bronco II

1 Answer

Surburban won't shift into 2 wheel hi insteads ends up in 4 wheel low


if its manual shift then inspect the linkage, if its push button then the motor/servo on the transfer case could be the issue. or the switch. i had to chase a simular issue on my tahoe and it ended up being the motor on the transfer case that selects the gears

Mar 13, 2012 | 1999 Chevrolet Suburban

1 Answer

4 wheel will not engage


Sounds like the transfer case motor need replaced.

Jan 30, 2010 | 1988 Ford Bronco II

1 Answer

Transmission fluid leaking back, 1988 Ford Bronco


your output seal on the tranny or input seal on your transfer case is bad. you have to pull your transfer case to tell. this is a pretty straight forward job. block wheels. put transfer case in neutral. drop front and rear drive lines.diconnect transfer case shift linkage. there is a short commponent connecting the trans to the transfer case. the bolt on either end face each other. remove the bolts to the transmission. the transfer case is heavier than it looks, i suggest getting help. pull back on the transfer case until it will drop down. it will pull out a bit because of the trans output shaft. replace what will probibly turn out to be the tranny output shaft seal and reassemble in reverse order.

Nov 06, 2009 | 1988 Ford Bronco II

1 Answer

4X4 1988 bronco ii shift-on-the fly problems


sounds like the shift motor on the transfer case is not working

Apr 09, 2009 | 1989 Ford Bronco II

1 Answer

TRANSMISSION


The two wheel drive tranny won't work because it will be longer. The tranny that came out of the 4 wheel drive is shorter and the transfer case bolts to the rear of the tranny thus it has a shorter output shaft and a different spline to accommodate the transfer case. You need to find the correct tranny unless you want to change the internals from one tranny to the other.

Feb 26, 2009 | 1988 Ford Bronco II

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