Thinking of Dual Range® Auxiliary Transmissions from US Gear - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 08-01-2006, 10:53 AM   #1 (permalink)
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Thinking of Dual Range® Auxiliary Transmissions from US Gear

Anyone have or use it? I feel the need to spend the money with the fuel situation. Need overdrive with my 4:10 rear and 4X4. They say 20% change which would give me about 3:53 ratio. Need advice. And yes it will pay for itself at current price of fuel. At least I think it will. I do 150k per year on truck and fuel is now just over half the cost. I hate driving 60mph.
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Old 08-01-2006, 12:39 PM   #2 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I'm a little interested in these too, but haven't really looked into it yet.
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Old 08-01-2006, 01:06 PM   #3 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

will be looking into it. I now know they can install one on my 4X4. My logic for buying is mpg. Doing 150k a year with what I estimate as being able to use US Gear's overdrive about 60% of the time. Estimate possible 2 mpg improvement. This should give me savings of 803 gallons. This equates to 803 X $3.00 per gal = $2409 (yr). Cost of the overdrive would run around $3000 to $3500 est. I also think my estimates maybe low on the fuel savings. Hope I am not low on the cost of the drive. Fuel also seems to be going higher.
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Old 08-01-2006, 01:10 PM   #4 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I ran a GearVendors behind a C6 that was attatched to a 500 inch big block in my 75 F250 4x4 and it worked great. It got the snot beat out of it and it's still alive. When I repowered the F250 I gave the GearVendors to a friend, it's now behind a 4L80E in a 3500 (I hate to admit I'm friends with people who drive that other brand) and has just over 220K miles on the GV. All I've ever done was change the oil.
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Old 08-01-2006, 01:49 PM   #5 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

you gave him a gear vendors even though he drives a unspeakable brand truck?can i be your new friend?
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Old 08-01-2006, 03:58 PM   #6 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

Well, yes I did give him the GV. Later that year he gave me most of the fixings to build my 1874 HP cruising engine and inframed my 3406 since I was too lazy to do it myself. Then I gave him my Dedenbear powerglide cause I was tired of it. We just trade junk back and forth.
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Old 08-01-2006, 04:15 PM   #7 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

If you change your mind and decide on a GV unit, I have one with only 40k on it. [img]/ubbthreads/images/graemlins/smokin.gif[/img]
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Old 08-01-2006, 08:29 PM   #8 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

The USG unit is a very well made, all mechanical gear train. The weakness in the design is simply it's harshness if you want to use it for "splitting" (really only an issue with manual trans, and with practise, it can be done quite smoothly), and its very small oil capacity. With only 1 quart on board, a leak could be bad. If you are over 30k and running fast, heat buildup could be an issue (is also a big deal with the GV at those weights). Stick with a full synth 75W-90 gear lube, Mobil, Redline, etc.

However, don't expect some big gain in mileage on a diesel. You MIGHT see one mpg (which is still significant), but I would be surprised if you got any more. If you were always running empty, a rear axle gear change is cheaper, but if you want to go bewtween towing and empty gearing, this is the best way by far. The other option (GV) won't work in 4x4 - a big deal if you tow in the rough or snow.

You will be amazed at how much quieter the truck can be with the revs down by 20%. Almost worth the price of admission (in my admittedly noisy 450).

And, I forgot to mention, these things are bulletproof.
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Old 08-22-2006, 07:59 PM   #9 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I noticed on ths GV site that it had listed the 4X4. http://www.gearvendors.com/4x4.html. Check out 3D0273. What do you think? Tried to price this at Camping World but the salesmen could not get the info. Left my info but they never called.
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Old 08-22-2006, 08:07 PM   #10 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

[ QUOTE ]
I noticed on ths GV site that it had listed the 4X4. http://www.gearvendors.com/4x4.html. Check out 3D0273. What do you think? Tried to price this at Camping World but the salesmen could not get the info. Left my info but they never called.

[/ QUOTE ]

Pricing on site Pricing $2895

Better check torque limits with mfg if you've got a bunch of mods.
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Old 08-23-2006, 06:14 AM   #11 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I'm running one and it works great. The previous owner had installed it and I don't do any heaving towing so I basically use it for the highway. It makes cruising much more comfortable just due to the lower rpms and you probably get 1-2 mpg but that's hard to say. I've definitely recorded 20mpg on all highway driving with the OD unit, but never tried it with the 4:10's. And unless I'm missing something, the unit is a .8 reduction, and 4:10 x .8 = 3.28, so you'll notice it for sure. The shifts are a little slow and harsh, so actually splitting gears might get annoying like Pat was saying - but I don't actually shift it enough to care. Hope that helps answer some questions.

Steve
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Old 08-23-2006, 11:24 AM   #12 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

is your truck a 4x4? if not, I would sure think just changing the rear end ratios woudl be a LOT cheaper.

don't forget with GV you need to rebiuld rear driveline and install the GV, not totally trivial.
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Old 08-23-2006, 11:59 AM   #13 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I ran the US Gear (was Doug Nash then) behind a "built" 454 Chevy gas engine. I would gross about 22k most of the time. In 10,000 miles it had burn up two shift motors and three sets of points. Once when the shift motor went out, I attempted to change it on the side of the road. When I removed the cover over the points, the lube spilled out and was litterly boiling. The inside of the unit became covered in what appeared to be coke. Unless they have cured the overheating problem, I would be very leary.

I am going to change the gears under my 450 from 4.88 to 4.30. I get tired of turning 3,000 rpm's cruising down the highway.
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Old 08-29-2006, 10:09 PM   #14 (permalink)
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Re: Thinking of Dual Range® Auxiliary Transmissions from US Gear

I chose to go with a US Gear over GearVender due to GV's refusal to work with me when I wanted to move the GV unit from my 86 to my 97 (required a different adapter). However, my order with US Gear, placed during the last week of June of this year, has still not arrived. I was told when I placed my order that it would be on back order for 6 weeks..javascript:void(0)
[img]/ubbthreads/images/graemlins/frown.gif[/img] [img]/ubbthreads/images/graemlins/frown.gif[/img].. I called last week (8/25/06), and was told it would be another 5 weeks before my unit would be ready...... javascript:void(0)
[img]/ubbthreads/images/graemlins/shrug.gif[/img]

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Old 05-26-2011, 06:48 AM   #15 (permalink)
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looking for a few parts for my dual range, cover parts mostly and an exploded view drawing. Running it in my motor home, 6.9 IDI 23 ft and 18mpg. love the dual range but they are not in production any more.
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