Question about 1993 Toyota Previa

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How do you replace the viscous coupling in a 1992 Toyota Previa AWD ? I have the transfer case split but can't see how to get V/C off the gear shaft?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 160 Answers

SOURCE: 1997 Ford Explorer AWD Problem

awd and 4wd vehicles can't have 2 different size tires run or it will damage the transfer case,but you should be able to get a new bar i beleive what your talking about is called a torsion bar

Posted on Nov 12, 2008

  • 74 Answers

SOURCE: 1996 Grand Cherokee transfer case binding.

Is it a consistent pulsing or does it get faster as the speed goes up?

Posted on Feb 10, 2009

  • 2 Answers

SOURCE: Transfer case? Front diff? HELP!!

I just bought a 1999 jeep grand cherokee from a guy, he was telling me that he had to replace the whole transfer case because he used fluid in it that wasnt made by jeep, thinking they were ripping him off. So maybe you put in an off brand fluid in it?

Posted on Apr 26, 2009

  • 3 Answers

SOURCE: 1992 Toyota Previa van,Oil dripping onto exhaust manifold, replace head gasket? need a free manual!

The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.

Posted on Jul 15, 2009

Garagetuner1
  • 1 Answer

SOURCE: 91 Toyota Previa AWD - Swap original engine for Previa Supercharged engine

I do a lot of work on Toyota Previa before; including rebuilt engine, swapping engine and transmission and lot of things in between, but never swap a normal aspirated engine to a supercharged engine or diesel. Since i have some experience in Previa, I would like to share my opinion with you regarding your plan to swapping the normal aspirated Previa engine to a Supercharged engine. When you do a swapp like that, you will not only be dealing with just swapping engine, but some wiring, computer, throttle body, air cleaner assembly, extra frame and pulley on the accessory items, transmission as well as a right rear end to get the correct gear ratio to accomodate the new engine and transmission. I can go on even more, but let me tell you this, beside less headache, it would definitely cheaper if you were to find a Supercharged Previa and fix it up. However, if you are totally motivated to do this project, keep in mind, this engine swap will be a long term and time consuming project.l I wish you best of luck and have fun!

Posted on Jan 17, 2010

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1 Answer

Transfer case neutral position


this is clearly stated in the operators guide.
lost that so soon?
is the the 4wd option car? acutally allwheel drive. AWD
the question is for the non awd is if the transmission
can lubricate its axle gears, being towed.
and AWD all 4 wheels.
lost the manual, and 1st google hit is here.
http://www.toyota.com/owners/web/pages/resources/owners-manuals?p_p_id=changemodelyear_WAR_toyotaownersonlineportlet&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&_changemodelyear_WAR_toyotaownersonlineportlet_action=processRequest&_changemodelyear_WAR_toyotaownersonlineportlet_javax.portlet.action=processRequest#Owners-Manuals

the page essentials says, yes, 2wd, no AWD.

pretty clear, even pictures of all ways right and wrong.
RTM

Dec 29, 2013 | 2010 Toyota Venza

2 Answers

How to replace a timing belt on a 1992 toyota previa


most of the time when a timing belt goes it just goes and will not run i would look into a plugged cat converter on the exhaust

Jul 02, 2012 | 1992 Toyota Previa

2 Answers

2002 yukon front end wont engage


2002 GMC Yukon

2002 GMC Yukon

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

TRANSFER CASE NO FRONT DRIVE

Transfer Case No Front Drive

Cause

Correction

DEFINITION: The transfer case is not delivering engine torque to the front propeller shaft.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Viscous coupling faulty 1. Inspect the transfer case fluid for being black. If the fluid is

black, it is most likely caused by a viscous coupling failure.

2. Test for a faulty viscous coupling. Refer to Transfer Case

Description and Operation.

3. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

4. Inspect the viscous coupling for a bulged cover. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

5. Replace the viscous coupling if it is faulty. Refer to Transfer

Case Assemble in Transfer Case - NVG 149-NP3 Unit Repair.

Planetary carrier faulty 1. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

2. Inspect for faulty planetary carrier components. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

3. Replace any faulty planetary carrier components. Refer to

Transfer Case Assemble in Transfer Case - NVG 149-NP3 Unit

Repair.

Oct 19, 2010 | GMC Yukon Cars & Trucks

3 Answers

Rear cluch not working


Depends on what model and components you have:

{ ...
ENGINE TORQUE DISTRIBUTION – DIRECTING THE FLOW OF POWER
In an all-wheel-drive vehicle, engine power can be directed to all four wheels. Subaru Symmetrical AWD differs slightly from model to model in how it directs power to the wheels, depending on its transmission.

MODELS WITH FIVE-SPEED MANUAL TRANSMISSION – CONTINUOUS ALL-WHEEL DRIVE: A viscous-type locking center differential and limited-slip rear differential help distribute torque – normally configured at a 50/50 split front to rear. If wheel speed differs between front and rear axles, the center and/or rear differentials lock up to help distribute power to the wheels with the most traction.

MODELS WITH FOUR-SPEED AUTOMATIC TRANSMISSIONS – ACTIVE ALL-WHEEL DRIVE: An electronically controlled variable transfer clutch and limited-slip rear differential distribute power to where traction is needed. Sensors monitor parameters such as wheel slippage, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction.

MODELS WITH FIVE-SPEED AUTOMATIC TRANSMISSION – VARIABLE TORQUE DISTRIBUTION ALL-WHEEL DRIVE: As with Active All-Wheel Drive, an electronically controlled variable transfer clutch distributes power, but through a planetary-type center differential and a viscous-type limited-slip rear differential. Torque distribution is normally configured at a performance-oriented rear-wheel-biased 45/55 split front to rear. Sensors monitor the same parameters as for Active All-Wheel Drive.

WRX STI, WITH SIX-SPEED MANUAL TRANSMISSION – DRIVER CONTROLLED CENTER DIFFERENTIAL (DCCD) ALL-WHEEL DRIVE: The STI uses an electronically managed multi-plate transfer clutch and a mechanical limited-slip differential in conjunction with a planetary-gear-type center differential to control power distribution between the front and rear wheels. Featuring manual and three automatic modes, DCCD is normally configured at a 41/59 split front to rear. Sensors monitor parameters such as wheel slippage, steering angle, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction. DCCD also features a limited-slip helical front and Torsen® rear differential. ... }

And what are the symptoms? How do you know the coupling to the rear is not working?

Jun 05, 2010 | 1995 Subaru Legacy

1 Answer

SHUDDER WHEN TAKING OFF-4 WHEEL DRIVE did the fluid change in transfer case which solved most of the shudder. still some when taking off


If it only occurs while turning then check into the rear axle limited slip grabbing to much. If its AWD and it only occurs while turning then the circumfrence of your tires are to different or the viscous coupling i nthe transfer case is locked up.

Mar 16, 2010 | 1999 Ford Explorer

2 Answers

I have a 2000 bravada and the awd doesn't isn't working. I took to the shop I usually get work done at and they said it was working fine. I am no mechanic but when the front tires aren't moving and you are...


I'm pretty sure the computer controlled NP-136 transfer case (which uses two speed sensors to sense the difference in speed between the front output shaft and the rear output shaft, and engages the front axle accordingly) was installed in 1998 and later models.

These trucks (mine included) use an "Active On Demand" transfer case. Basically its a normal 4x4 transfer case with a big electrically actuated (by way of a motor) clutch that connects the front prop-shaft (which is being spun by the wheels full time) to the transfer case front output. Its all in the transfer case.

Good luck and hope this help, check all the fuses and the wire harness to the encoder motor and replace the encoder motor if it has gone bad. Try bring it to a transmission shop that is familiar with the AWD system on your Bravada. The earlier years were a different system, 1998 was when the change was made. 1997 and earlier use the Borg-Warner 4472, which is always engaged with the use of the viscous coupling. Both were marketed as "SmartTrak" though.

Sounds to me like the transfer case actuator motor is either faulty or it is being told to be on all the time (which it shouldn't be).

Dec 15, 2009 | 2000 Oldsmobile Bravada

1 Answer

I need a SLIP-YOKE for a rear driveshaft of a 1995 Toyota Previa LE supercharged AWD.


by slip -yoke for rear drive shaft, I think you describe a spline joint with universal joint yoke attached, I have all drive shafts for an AWD previa. Write jsimm@verizon.net

Oct 09, 2009 | 1995 Toyota Previa

2 Answers

2002 merc mountaineer awd wont come out of awd


If the vehicle is made to be a AWD you cannot get it out of AWD unless you take off the front drive shaft

Feb 10, 2009 | 2002 Mercury Mountaineer

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