Aux. Tranny
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Senior User
Joined: Mar 2007
Posts: 198
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Aux. Tranny
Does Anyone Use An Aux. Overdrive/underdrive Tranny Behind Their 4r100 Tranny?
What Gear Ratio Rear End Are You Running?
Do You Use This For Towing? If So; How Heavy A Towed Item?
Your Pro's And Con's On Using One?
Is This Cost Worth The Investment?
What Brand Are You Using?
Toughness And Strength?
Do You Use This On A 2wd Or 4wd Truck?
What Gear Ratio Rear End Are You Running?
Do You Use This For Towing? If So; How Heavy A Towed Item?
Your Pro's And Con's On Using One?
Is This Cost Worth The Investment?
What Brand Are You Using?
Toughness And Strength?
Do You Use This On A 2wd Or 4wd Truck?
still plays with trucks
Joined: Mar 2004
Posts: 1,743
Likes: 3
From: Twin Falls Idaho
I have used both Gearvendor and US Gear. I had a GV in my 97 F350 with an E4OD. my current ride is an F550 with a 6 sp. I use a US gear OD in it. Yes I tow, about 15,000 lbs. gear ratio in the 1 ton was 4:10 the 550 runs 4:88s. You will see an effective RPM drop of 500-700. Cost of the units is very similar, the designs are compleately different. the GV is a little automatic tranny, the US G is a little manual.
the us gear is a tuogher unit,its rated higher GVW, it can be used with an exhaust brake (GV specificly says this is a nono). install on a 2wd is very similar on a 4wd is different. IMHO I would choose the US Gear, its bulletproof. Barney
the us gear is a tuogher unit,its rated higher GVW, it can be used with an exhaust brake (GV specificly says this is a nono). install on a 2wd is very similar on a 4wd is different. IMHO I would choose the US Gear, its bulletproof. Barney
Elder User
Joined: Sep 2006
Posts: 899
Likes: 0
From: Irmo, SC
Just got a US Gear a few weeks ago and love it. Mileage went up about 2-3 mpg. Fixing to tow the trailer this weekend from California to Texas so I will let you know how much better the mileage is when I am finished. I have 4.10's in my dually 60 was 2k rpms and now I am almost at 75 before I hit 2k rpms.
