I have a 1998 Izusu Wizard (ex Japan)
It is the 4XJ1 3.0L common rail, turbo diesel
It is a 4 speed auto transmission with high ratio 2WD & 4WD & low ratio 4WD, it has a push button on the dash to put into & take out of 4WD
When in high ratio, if I push button on dash to engage 4WD, after a few hundred meters it slips out of 4WD (lever moves to neutralosition)
It is also difficult to dis-engage 4WD - when the button on the dash is turned off the 4WD light continues to flash & will not dis-engage 4WD
To dis-engage I have to stop & reverse & go forward a few times before it with disengage
Any suggestions on how to fix this problem would be appriciaited
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The basic explanation of these gears are as follows. 2up/2wd is a basic two wheel drive setting where the vehicle will react as a rear wheel drive. In this gear the transmission will only distribute power to the two rear wheels(best for all around driving with clear road conditions and will give the best fuel efficiency). 4up/4wd is a high speed four wheel drive setting. in this gear the transmission will always distribute power to all four wheels and will allow you to drive at higher rates of speed( good for poor road conditions when ice and wet roads are a moderate risk). 4dwn/4lo is a low gear four wheel drive setting where again the transmission will distribute power to all four wheels but will limit you to a low rate of speed(good for really rough roads and severe weather or very poor traction conditions). auto gear selection is basically a all wheel drive setting, where the transmission will use a primary setting of rear wheel drive gearing until the vehicle slips or looses traction on one of the drive traction. as soon as the transmission detects a difference in wheel speed between the two rear wheels, at which time the transmission locks up the front differential turning itself into a four wheel drive, until the wheels have regained traction and remain spinning at the same speed for a set amount of time, at which time it will then unlock the front differential at return to a rear wheel drive setting. this is a good all around gear but will cause you to get slightly less mpg/kpg then a 2up/2wd gear would. i hope this helps
it sounds as if you need to replace the transmission...i don't really thing that a flush or service will help at this point...if trans is slippin already, locate a transmission from your local auto wreckers and replace it...or go new..
IT IS THE STRAINER INSIDE THE PAN IN THE TRANSMISSION,WHEN ITS COOL THE FLUID IS TO THICK TO TRAVEL AND GRITTY TO GO THROUGH THE STRAINER SCREEN,BUT WHEN THE TRANNY WARMS THE FLUID ITS THEN ABLE TO FLOW THROUGH THE SCREEN AND SHIFT PROPERLY.
Your Schro's are going bad in the 4WD HIGH Trans Case. This sucks i know. But i had the same problem berfore.
Unit will continue to work good in low range since the stress is less then on the HIGH range. I would never use the 4WD HIGH anyway...doesnt do much on the street...just tears up the gearing and schros.