Can’t shift on the fly 4WD
#1
02-13-2021, 12:47 AM
Can’t shift on the fly 4WD
Hey guys, only lately I’ve noticed I cannot shift into 4Hi while rolling, it will only go while completely stopped. Either situation I am in neutral. It makes a sort of quiet metal ‘rubbing’/syncro attempting to work’ type of noise, when you pull back on the lever while rolling. Not a violent or bad sound. I’ve looked around on forums and can’t find anything except this:
“Note: During cold weather (below 30F.) it may be more difficult to shift the transfer case while the vehicle is moving. If so, stop the vehicle and shift.”
Sure enough it’s been cold, have you guys experienced this during cold weather? Maybe that’s it, but I’ve never heard of the cold affecting this.
“Note: During cold weather (below 30F.) it may be more difficult to shift the transfer case while the vehicle is moving. If so, stop the vehicle and shift.”
Sure enough it’s been cold, have you guys experienced this during cold weather? Maybe that’s it, but I’ve never heard of the cold affecting this.
#2
02-13-2021, 01:52 AM
#3
02-13-2021, 10:08 AM
Yeah, according to the manual, you can shift into 4x4 at "up to" 55 mph..... Don't think I would wanna be moving that quickly though while shifting..... On my trucks, if I wanna hit 4 hi, I just let off the gas, and give the expensive stick a yank. Haven't had any problems doing it that way.
#4
02-13-2021, 10:08 AM
Record Breaker
Honestly I've always wondered how it gets the front d/s up to speed. I think what you're experiencing is trying to slide the collar in the t-case to engage the chain (and thus front output) but the rear is going "X" while the front is going ZERO.
Sometimes the collar is spring loaded such that when you pull the lever it's not a DIRECT mechanical link but rather preloads the collar with a spring so it'll slide and engage when the splines line up....which would happen because the front would eventually engage the CAD which would spin the front d/s to t-case front yoke to chain. BUT I actually don't think the 231 has said spring.
I service a '99 with the same symptoms but I never pursued it and the customer wouldn't be able to afford to pay me to solve it. My guess is wear of something in the 'case....but I'd need to open it up to diagnose
Sometimes the collar is spring loaded such that when you pull the lever it's not a DIRECT mechanical link but rather preloads the collar with a spring so it'll slide and engage when the splines line up....which would happen because the front would eventually engage the CAD which would spin the front d/s to t-case front yoke to chain. BUT I actually don't think the 231 has said spring.
I service a '99 with the same symptoms but I never pursued it and the customer wouldn't be able to afford to pay me to solve it. My guess is wear of something in the 'case....but I'd need to open it up to diagnose
#5
02-13-2021, 10:22 AM
Honestly I've always wondered how it gets the front d/s up to speed. I think what you're experiencing is trying to slide the collar in the t-case to engage the chain (and thus front output) but the rear is going "X" while the front is going ZERO.
Sometimes the collar is spring loaded such that when you pull the lever it's not a DIRECT mechanical link but rather preloads the collar with a spring so it'll slide and engage when the splines line up....which would happen because the front would eventually engage the CAD which would spin the front d/s to t-case front yoke to chain. BUT I actually don't think the 231 has said spring.
I service a '99 with the same symptoms but I never pursued it and the customer wouldn't be able to afford to pay me to solve it. My guess is wear of something in the 'case....but I'd need to open it up to diagnose
Sometimes the collar is spring loaded such that when you pull the lever it's not a DIRECT mechanical link but rather preloads the collar with a spring so it'll slide and engage when the splines line up....which would happen because the front would eventually engage the CAD which would spin the front d/s to t-case front yoke to chain. BUT I actually don't think the 231 has said spring.
I service a '99 with the same symptoms but I never pursued it and the customer wouldn't be able to afford to pay me to solve it. My guess is wear of something in the 'case....but I'd need to open it up to diagnose
