Whoa! Tag for a follow on this thread.
Thanks for the reply. The gearbox is factory. So I’m off to a good start there. I’ll jack it up either tomorrow or on the weekend and see if the front wheels spin when I have 4x4 engaged and accelerating. I’ll get back to you.Goodness, you weren't kidding about it having a hard life.
The transmission behind that G200 should be an MSG4.
Yes. The vehicle is running. But it seems to get stuck in rocks and only the rear wheels are spinning.There is nothing aside from the shifter itself that influences engaging 4wd. Is the vehicle running?
How do free wheel hubs, whether auto-locking or manual, affect tire wear?The only difference between the two systems is the 87 and up had Auto locking hubs to disconnect the front wheels from the axle. This is so in two-wheel drive mode your axle and front drive shaft do not spin. This increases your fuel economy and prevents unnecessary tire wear.
When the front tires spin the 4 front CV joints, axle shafts, carrier assembly, ring & pinion, driveshaft all the bearings plus flinging all that gear oil adds rotating mass and friction. When turning the steering wheel the CV joints bind some which adds even more friction to the system. Simultaneously the spider gears requires added differential force for the action to function. All this added mass & load prevents the front tires from spinning freely as they should. Contributing to unnecessary treadwear and lowering fuel economy.How do free wheel hubs, whether auto-locking or manual, affect tire wear?
Are your hubs engaged?Yes. The vehicle is running. But it seems to get stuck in rocks and only the rear wheels are spinning.
Yes. They are set to lock. I actually appreciate the simple questions. Just in case I’m missing something.Are your hubs engaged?
Fantastic info. Thank you. I’ll jack it up on the weekend and look it all over. A CV joint or issue in the hub is entirely plausible. Sadly so is the transaxle. I’ll get back to you.In the USA this type of vehicle is known as a Truggy. A cross between a truck and dune buggy.
The 4x4 light on your dash
Welcome...Fantastic info. Thank you. I’ll jack it up on the weekend and look it all over. A CV joint or issue in the hub is entirely plausible. Sadly so is the transaxle. I’ll get back to you.
The USA models got the Aisin auto locking hubs as the only option from 1984-1987. In 1988 with the introduction of the 10 bolt front axle and hub redesign, Isuzu went to their own auto locking hubs and Aisin manual locking hubs for the newly introduced automatic models. The Isuzu autos came on all vehicles except the 4-cylinder automatic until the end of the first gen Trooper in 1991. From then on it was only Isuzu autos on traditional transfer cases and drive flanges on the SOTF systems.Welcome...
I think it's important to add that first gen Troopers/jackaroo used 2 different auto locking hubs.. The US didn't have the trooper until 1984. So I can't say when this changed was made. The earliest type are made by Aisian and later years used Isuzu own inhouse designed locking hubs. They look completely different from one another.
If your hubs look the one in the photo, you do have Aisin auto locking hubs. Testing for proper operation of both sides will need to be added as possible cause of why your 4x4 is not working.
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i never had the time to confirm. Looks like you nailed down. Thanks for that information.The USA models got the Aisin auto locking hubs as the only option from 1984-1987.
Thank you very much. Jacked it up to check it all over on the weekend. Have a broken drivers side CV joint. I can see the half connected to the axle working. But where it connects into the wheel it’s not spinning at all. Ordered a new part. Will be here in a few days. Just want to thank everyone in the thread for their suggestions. Information and help.In the USA this type of vehicle is known as a Truggy. A cross between a truck and dune buggy.
The 4x4 light on your dash is turned on by a mechanical switch located on the side of the gear box. I would simply assume that the switch and/or the electrical for it is broken. Even so, working light or not it will not affect the operation of the 4x4 drive system.
The later second gen troopers/jackaroos featured a shift on the fly 4x4 system that requires a vacuum actuator to engage or disengage the axle.
The first generation Troopers/Jackaroo had two different four-wheel drive systems which function almost exactly the same. They're both fully mechanical drive systems and require the vehicle to come to a full stop before shift from two-wheel drive to four-wheel drive. The only difference between the two systems is the 87(?) and up had Auto locking hubs to disconnect the front wheels from the axle. This is so in two-wheel drive mode your axle and front drive shaft do not spin. This increases your fuel economy and prevents unnecessary tire wear.
Your early model Trooper/jackaroo front axle is permanently fixed. Regardless if you're in two-wheel drive or four wheel drive your front drive shaft and axle rotates.
EDIT: first gen troopers had 2 different types of auto locking hubs. The earliest type are made by Aisian and later years used Isuzu own inhouse designed locking hubs. The Aisin hubs are much larger than the Isuzu hub.
Aside from a broken differential, a broken or missing front drive shaft & a stripped hub drive flange..which is rare to find.... you're looking at three possible reasons why your four wheel drive is not engaging.
#1 Your transfercase is not shifting from two Wheel to four wheel drive. .
#2
You have a broken CV joint.
#3
The tip of the axle shaft is broken off inside the hub.
My best educated guess of what is wrong would be possibility number two and three.