Aurelio corso Posted March 27, 2020 Share Posted March 27, 2020 Truck drives in 2wheel and drives in 4 high but 4 wheel drive is not engaged and when I put it in 4 low it won’t go at all. Link to comment Share on other sites More sharing options...
Eagle Posted March 27, 2020 Share Posted March 27, 2020 Which transfer case do you have? The '86 is different from all the other years of the MJ -- is there a vacuum switch on your console along with the 4WD lever? Link to comment Share on other sites More sharing options...
Aurelio corso Posted March 27, 2020 Author Share Posted March 27, 2020 No switch ,it has a 5 speed man. And the v6. Link to comment Share on other sites More sharing options...
AMC86Kid Posted March 28, 2020 Share Posted March 28, 2020 If it’s a 86 it should be like mine then his transfer case should be a 207 and he should have a vacuum controlled front shift actuator on his front axle shifting it on and off he might be lucky and his hand held 4WD shifter might be loose under the truck and not shifting the transfer case at all but who knows I would jack the truck up and see what it does when you shift it does the front axle even spin ? Link to comment Share on other sites More sharing options...
Aurelio corso Posted March 29, 2020 Author Share Posted March 29, 2020 Thanks fort the replies. Link to comment Share on other sites More sharing options...
Pete M Posted March 29, 2020 Share Posted March 29, 2020 yup, it might just need a simple tweak of the shift rods to get low range back. or the bushings might be shot. or rust is allowing too much flex in the system. or something inside is broken. (but that's less likely) after that, check the link in my signature for a how-to for bypassing the CAD in the front axle. Link to comment Share on other sites More sharing options...
JustEmptyEveryPocket Posted March 29, 2020 Share Posted March 29, 2020 4 hours ago, Pete M said: bypassing the CAD in the front axle. Personal opinion time: I highly recommend installing THIS system for 4x4 selection instead of just locking the CAD. I find that 2wd low range is very useful for me. My truck doesn't get wheeled, but it does truck duty things. Most often, I don't need 4wd but I do need to go slow, so 2wd low range works great. Consider backing up a trailer where you can just let the clutch out and slowly back-up, no more feathering it. Or putting your truck into a small space so you can load whatever. Its way less stressful to creep backwards instead of twitching backwards in spurts. I also drive across rough ground often, and with 2wd low I can put the truck in second and take my feet off the pedals. It crawls along at the right pace and the bumps no longer cause it to squirt forward by accidentally tapping the gas. When you have 2wd low you will see the uses for it. Another use is in bad weather I can put my truck is 4wd high, but leave the CAD disengaged and drive like normal. If I come to a patch of bad road its very easy to pull back on the knob and get instant, at speed, 4wd that engages when its supposed to. So there you go, a long winded ramble telling you how to spend your money. Take it or leave it. Good luck! Link to comment Share on other sites More sharing options...
Pete M Posted March 29, 2020 Share Posted March 29, 2020 1 hour ago, JustEmptyEveryPocket said: Personal opinion time: I highly recommend installing THIS system for 4x4 selection instead of just locking the CAD. I find that 2wd low range is very useful for me. My truck doesn't get wheeled, but it does truck duty things. Most often, I don't need 4wd but I do need to go slow, so 2wd low range works great. Consider backing up a trailer where you can just let the clutch out and slowly back-up, no more feathering it. Or putting your truck into a small space so you can load whatever. Its way less stressful to creep backwards instead of twitching backwards in spurts. I also drive across rough ground often, and with 2wd low I can put the truck in second and take my feet off the pedals. It crawls along at the right pace and the bumps no longer cause it to squirt forward by accidentally tapping the gas. When you have 2wd low you will see the uses for it. Another use is in bad weather I can put my truck is 4wd high, but leave the CAD disengaged and drive like normal. If I come to a patch of bad road its very easy to pull back on the knob and get instant, at speed, 4wd that engages when its supposed to. So there you go, a long winded ramble telling you how to spend your money. Take it or leave it. Good luck! your t-case should be able to be shifted into hi-range on the fly. Link to comment Share on other sites More sharing options...
omega_rugal Posted March 30, 2020 Share Posted March 30, 2020 too bad most, if not all, transfer cases don't let you select unlocked 2wd- low, not without modding Link to comment Share on other sites More sharing options...
JustEmptyEveryPocket Posted March 30, 2020 Share Posted March 30, 2020 18 hours ago, Pete M said: your t-case should be able to be shifted into hi-range on the fly I know mine should, but it never has. Any time I try (at any speed from 10mph - 50mph) it just gives me terrible grinding and no engagement. So the posi-lock is my solution. Has been working great for 3 years now. In this case, I will take what works. Link to comment Share on other sites More sharing options...
Pete M Posted March 30, 2020 Share Posted March 30, 2020 interesting. I wonder if the linkage is just a hint out of alignment. Link to comment Share on other sites More sharing options...
Pete M Posted March 30, 2020 Share Posted March 30, 2020 Link to comment Share on other sites More sharing options...
derf Posted March 30, 2020 Share Posted March 30, 2020 My bet is on linkage adjustment. Link to comment Share on other sites More sharing options...
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