us gear dual range
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
The shifting lag in the US gear unit is because of the shifter motor design ... According to US gear the proper procedure for shifting is to flip the switch a couple seconds (I forget exact time frame) BEFORE you want to shift, then release the drive train load (push clutch or throttle sync) and it'll shift.
Flippin the switch and releasing the load (pushing the clutch or throttle sync) at the same time will cause slow shifts, partial shifts and possibly damage the unit.
Shift them Just like a two speed rear end (or transmission), flip the switch then allow it to shift.
-Enjoy
fh : )_~
Flippin the switch and releasing the load (pushing the clutch or throttle sync) at the same time will cause slow shifts, partial shifts and possibly damage the unit.
Shift them Just like a two speed rear end (or transmission), flip the switch then allow it to shift.
-Enjoy
fh : )_~
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Cruising along in 5th lo, Come to a hill, flip the switch to high, wait a few seconds, then shift the trans to 4th, thus you are now in 4th hi.
That would be splitting down... 5th low to 4th high
Be careful when split shifting, you do not want to get both gear boxes in neutral at the same time ... With the US gear unit, it shifts so fast that you would have to try to do it. By the time you have the main in neutral the US Gear unit will have already shifted.
Have I actually shifted a US Gear unit ... NO!
But I do have many years of experience shifting all sorts of gear boxes... From twin sticks to 18 speeds, with and without two speed rear ends.
Nothing like shifting a twin stick with a two speed rear end... fun! Just don't f'up or you'll either be under the truck or calling a hook!
-Enjoy
fh : )_~
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
Now I'm confused. With a T19 transmission, can you not flip the switch while in 4th gear and then complete a shift back into 4th gear (in other words, shift into neutral to activate the high range and then back into forth), but into high range, thus into 4th high / OD?
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Yes, You can, that would be going from 4th lo to 4th high, but why pull it out of fourth, just flip the switch, wait a couple seconds, then ease up on the go pedal (kinda like you were using the clutch) and the US Gear unit will shift. You can depress the clutch if you want, but according to US gear you don't need to, just ease up on the throttle and she'll shift, as soon as it shifts stuff your foot back in it!
-Enjoy
fh : )_~
-Enjoy
fh : )_~
Posting Guru
Joined: Jul 2004
Posts: 1,627
Likes: 0
From: West Valley Utah
Pre loading the US Gear to shift is the opposite of how most gear boxes work. You can pre load any of them but it will cause a failure. I've never been around a US Gear over/under drive but if you can pre load before shifting, it would make shifting easier.
With the Gear Vendor, you keep your foot stuffed into the throttle and just hit the button and it shifts for both up and down shifts unless it's for slowing before a stop. With no throttle pressure it will bang pretty good on a down shift. There's a lot of slop when you add it all up with the trans, transfer case, overdrive and axle and it's all coasting at the time.
I only know from my neighbor driving my truck and learning how to shift it the right way.
With the Gear Vendor, you keep your foot stuffed into the throttle and just hit the button and it shifts for both up and down shifts unless it's for slowing before a stop. With no throttle pressure it will bang pretty good on a down shift. There's a lot of slop when you add it all up with the trans, transfer case, overdrive and axle and it's all coasting at the time.
I only know from my neighbor driving my truck and learning how to shift it the right way.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
-Enjoy
fh : )_~
Posting Guru
Joined: Jul 2004
Posts: 1,627
Likes: 0
From: West Valley Utah
I was talking about the 1-2 seconds that was mentioned. Pre loading a RoadRanger splitter is a big NO. If it's just flip the switch or push/pull the button shift right after, that's different than letting it pre load for 1-2 seconds.
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Junior User
Joined: Jul 2009
Posts: 65
Likes: 0
well ive got 400 miles on the dual range now and it is looking like the best 50 bucks ive spent in a long time i love this thing i can run down the freeway at 70 in forth high and still pull the grades at 60 in forth low. also makes the 3 to 4th shift alot nicer if you split it when loaded.
New User
Joined: Sep 2010
Posts: 16
Likes: 0
From: San Jose
us dual range
You say you just put one would you mind sharing some of your knowledge with me. I bought a c6 tranny that had a us gear on it and need some help with the wiring I have tried to find out no luck. I have installed in a 56 f100. thanks Gary
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