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Old 06-26-2008
racsan's Avatar
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low to high range shifting on the go?

i was wondering if its possible or even safe with the electric transfer case to shift on the go from low to high range, theres been a few times when ive been moving out of a yard onto the road in low range, (hubs unlocked) and instead of stopping, it would be a change if i could just shift to high range from low range 4rth gear into 2nd gear high range. ive done something similar in the past with a manual t/c truck , but with the electric shift theres a saftey that makes you be almost at a stop to go into/out of low range. i dont want to destroy a working transfer case though, even if it is the less-desireable electric shift.
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Old 06-26-2008
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I think you answered your own question. Just in case you didn't catch it, the electric shift case has a safety that will not allow you to shift from low to high and high to low on the move. So, unless you can figure out how to electronically by-pass that safety, you cant do it. Is it safe if you can do it? No, unless you are extremely skilled at it and then it is qestionably safe.
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Old 06-26-2008
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Older trucks, like my old 205 in my international or the 203 in my chevy...you can go from low to high range with a little wiggle of the shifter and throttle. But...those are fully mechanical cases, unlike our pile of crap electric ones.
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Old 06-26-2008
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even the ranger mechanical cases cannot be shifted from low to high while moving, it makes very bad grinding noises and does bad things to the t-case.
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Old 06-26-2008
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Of course you CAN. It might take some bypassing of safety interlocks or excessive force applies to a manual shift. But it is certainly doable.

Just make sure you have a tow truck waiting so when the pieces of flying out of it, you can get the truck towed to a shop. You should also have some speedy-dri handy to clean up all the gear oil that spills out.
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Old 06-27-2008
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well, it was just a thought, kinda thinking of the old 2 1/2 ton dumps with the 2 speed rear axle that you could split-shift on the go. i know one of the wires was a speed sensor. dont need to grenade a t-case. ive done it years back with a dana 300 in a jeep CJ7. much beefier unit than whats in a ranger. i kinda thought that with there being a oil pump in there and a planatary unit, low range was accomplished by holding or releasing a band, much like a auto trans shifts gears. based on that i thought that on the go upshifts to high range could be done. i know why theres a safety, you wouldnt want a curious child / freind to push the low range button while going down the road in the winter in 4 high at 50 mph.

Last edited by racsan; 06-28-2008 at 10:24 AM.
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