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08-18-2015, 05:50 PM
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#1
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Junior Member
Join Date: Apr 2012
Posts: 11
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Gear splitters
Does anyone have experience with a "gear splitter ", such as Gear Vendor?
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08-18-2015, 07:23 PM
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#2
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Senior Member
Thor Owners Club Forest River Owners Club Ford Super Duty Owner Georgie Boy Owners Club
Join Date: Feb 2011
Location: Utah
Posts: 658
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waste of money in most cases
Quote:
Originally Posted by turtlebutt_k
Does anyone have experience with a "gear splitter ", such as Gear Vendor?
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I had a gear venders on a 1995 class a motor home. As far as I am concerned, it was a waste of money. It did give a higher gear like Overdrive and I was able to split shift going up hills, but it did not do a thing for mileage except maybe i/10th Mpg. I would have been better off spending the money on Headers which I later added and a Banks Ram air to gain a few more HP.
Mel
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08-18-2015, 08:25 PM
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#3
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Junior Member
Join Date: Apr 2012
Posts: 11
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Thanks Mel 😎
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08-18-2015, 08:32 PM
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#4
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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We put one in our '88 Type B Okanagan MH. It had the TT towing package, a 460 and only weighed 8,800#'s. Just got tired of the high RPM at 70 mph. Still never got 10 mpg though but the noise reduction was nice.
The driveshaft was an aluminum one and they fabricated a new steel one. It had different harmonics and also added some vibration.
Would I do it again? Well, maybe and maybe not.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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08-18-2015, 09:58 PM
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#5
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Senior Member
Join Date: Jun 2015
Location: Penticton BC
Posts: 203
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I have seen a few on vehicles I have worked on. They are strong and work well but would not expect any fuel savings. Weight,wind and speed seem to determine fuel used.
__________________
99 Dutch Star Spartan 300 Cummins,Toad 06 Matrix
31 Model A , 2007 Road Glide, 56 Chevy Handyman station wagon (in Progress)
DW Suzie and Georgia Newfie,Cleo Mastiff
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08-18-2015, 10:16 PM
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#6
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Senior Member
iRV2 No Limits Club
Join Date: May 2011
Location: Tempe, AZ
Posts: 1,833
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Gear splitters are great with manual transmissions, even more so when also used with a diesel, since they allow you to keep the rpms closer to the range you get your best torque. However, the torque convertor of an automatic performs pretty much the same function so, unless you need a lower overall gear on occasion or you are overgeared, gear splitters aren't much use with automatics.
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08-19-2015, 09:29 AM
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#7
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Junior Member
Join Date: Apr 2012
Posts: 11
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Thanks for all the replies. We have a gas...454ci...with a Banks Power Pack, drive mostly in non-mountainous areas, but wondered if a gear splitter would be worth the money. It doesn't seem to.
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08-20-2015, 09:43 AM
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#8
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Senior Member
Thor Owners Club Forest River Owners Club Ford Super Duty Owner Georgie Boy Owners Club
Join Date: Feb 2011
Location: Utah
Posts: 658
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Quote:
Originally Posted by turtlebutt_k
Thanks for all the replies. We have a gas...454ci...with a Banks Power Pack, drive mostly in non-mountainous areas, but wondered if a gear splitter would be worth the money. It doesn't seem to.
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My rig at the time was a 1995 Dolphin with a 454 engine, gas, coach was 36 foot long. The Gear vendors that I had installed was not worth the money. I also had a banks power pack installed and for me and driving in the mountains The Banks was worth it. Just my 02 cents worth.
Mel
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08-20-2015, 10:22 AM
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#9
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2009
Posts: 4,031
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I had installed a US Gear overdrive and a Banks header system both the same day.
Installed in a 1983 HR with 454 and 3 speed automatic.
Next day left on a long trip out west from IL. to SD, then to CO. and back to IN.
Before install average MPG was 6. On long trip average was 6 MPG.
__________________
99 Discovery 34Q ISB
2014 MKS AWD EcoBoost Toad
Fulltime Since "99"
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08-20-2015, 12:34 PM
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#10
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Senior Member
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 5,663
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I had a GV years ago on a Jeep Wagoneer, and it helped with the use of poser from the big 6, but not MPG.
On our previous 98 Bounder, with a 99 F53 Chassis and the first year of the V10 (A 2 valve that was according to the first owner a bit weak at 275HP. He add the full banks treatment, and said the power was then adequate. I could not compare from before, but felt the power was fine, when I bought it.) But, it had the 4 spd older auto trans. And I always felt that GV would have helped it when hill/mountain climbing. It seemed that third would sometimes bog down, and then the jump to second, would get the engine screaming - as the V10 6.8 does like RPM's. I felt that a 'split gear' between 2nd and 3rd, would have worked very well on hill climbing.
If we had kept the coach, I would have found a GV from a salvage yard, and then have GV check it out and fix anything that needed fixing. (They are about 20 miles from our San Diego home, so easy for me to take it into them.).
So, if you can get your name on a salvage companies 'wish list', and pick up a new one, you might find the investment is worth it.
Best,
Smitty
__________________
07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
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08-21-2015, 07:51 PM
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#11
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Senior Member
Join Date: Nov 2011
Posts: 884
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Quote:
Originally Posted by LadyFitz...
?..However, the torque convertor of an automatic performs pretty much the same function so, unless you need a lower overall gear on occasion or you are overgeared, gear splitters aren't much use with automatics.
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In the Allison 3000 and 4000 transmissions used behind most diesels, the lock-up clutch engages in 2nd gear and stays engaged from there through top gear. There is no torque converter action once that clutch engages.
2006 Mandalay 40E, Cummins ISL 400 HP
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08-21-2015, 11:01 PM
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#12
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Senior Member
National RV Owners Club Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 3,784
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I read this on Gear Vendors Web site. Notice the last sentence what they recommend to get better MPG.
Motorhomes — because of the aerodynamic loads of the big box shape, motorhomes fall into two categories. Those with factory overdrive and those without. Without factory overdrive you absolutely need a GEAR VENDORS. 22-28% gains typical on all three speed automatics, plus all the other benefits of gear-splitting ratios etc. for climbing hills and towing. For Motorhomes with factory overdrive the big gains are in the ability to climb hills with better splits in the ratios. Running double overdrive is not practical for saving fuel except in those instances where you have a tail wind because it is really the aerodynamics the dictate the horsepower you need. This is why a motorhome gets big mpg gains by just slowing down to 60 instead of 70mph.
__________________
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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08-22-2015, 12:43 PM
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#13
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Senior Member
iRV2 No Limits Club
Join Date: May 2011
Location: Tempe, AZ
Posts: 1,833
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Quote:
Originally Posted by Rich-n-Linda
In the Allison 3000 and 4000 transmissions used behind most diesels, the lock-up clutch engages in 2nd gear and stays engaged from there through top gear. There is no torque converter action once that clutch engages.
2006 Mandalay 40E, Cummins ISL 400 HP
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Thanks! I stand...er...sit corrected.
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08-24-2015, 02:41 PM
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#14
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Member
Join Date: Oct 2014
Posts: 77
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gear vendor
Back somewhere around 1986-87 , I had a chevy suburban 3/4 ton, four wheel drive ,low geared rear end, extra wide tires and 454 motor. This was in deep so. Tex. flatlands. Ordered a GV from San Diego and had my local mech. install it. Worked fine .Seems like an increase of 1 to 1-1/2 mpg. In 88-89 we bought a used 30ft. Honey class A , 454 cu.in. Mpg seems like it was 4. About the same time I traded the sub. on a new powerstroke, so removed the GV. We took vacation to so. Calif . and brought the GV with us to San Diego where Gear Vendors installed it in the Honey. Went from there up to Frisco, Lake Tahoe, Denver and home, to south Tex. Unit worked great in the mountains and mpg improved by 1/2 mpg. 454s loved to eat! With about 50 miles before we got out of New Mexico on some lonely two lane hwy. a nice patrolman pulled us over and gave me a ticket for 80mph in ( I think ) a 55mph zone. I thought I had been making good time!! Lucky that was the only ticket. Seems that GV forgot to change worm gear on transmission. Probably not much help, but I had fun remembering.
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