Ford Raptor Tech Forum Differential gear changes
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Im not sure where to post this. I have a 2012 Raptor the ...
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02-05-2012, 08:45 PM
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#1 (permalink)
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Junior Member
Join Date: Jan 2012
Location: Chicago & S.E WIsconsin
Age: 34
Posts: 22
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Differential gear changes
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Im not sure where to post this. I have a 2012 Raptor the truck has 410 gears. Can the gears be changed to a taller gear. My goal would be to get the RPMs down to 1600/1700 while cruising 75 mile an hour. Is this possible?
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2012 Raptor supercrew 6.2 .. HIDs, Strobes, SS works headers w/ cat delete borla and corsa mufflers. AFE and 5 star tune, Escort 9500ci, tinted 20% all around, LakeLand topper
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02-05-2012, 08:49 PM
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#2 (permalink)
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Diablo Runner
Join Date: Aug 2010
Location: Lake City, Mi
Age: 54
Posts: 2,191
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Originally Posted by colecoin
Im not sure where to post this. I have a 2012 Raptor the truck has 410 gears. Can the gears be changed to a taller gear. My goal would be to get the RPMs down to 1600/1700 while cruising 75 mile an hour. Is this possible?
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Its possible but why? I understand the idea but 16-1700 at 75.. thats a small gear.. Just guessing its like 20-25% smaller.. So you would want like a 3.55
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Last edited by Hockster; 02-05-2012 at 08:51 PM.
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02-05-2012, 08:53 PM
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#3 (permalink)
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FRF Addict
Join Date: Dec 2010
Location: Pensacola, Florida
Age: 29
Posts: 2,778
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You'd constantly be shifting in and out of 5th and 6th hunting for more power. Should've bought something else for mileage concerns, if that's what you're trying to accomplish. If there's another reason, then I'd be interested in your theory.
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2011 Ingot Silver SuperCrew
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02-05-2012, 08:56 PM
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#4 (permalink)
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Ford Professional
Join Date: Sep 2010
Location: St Louis, MO
Age: 50
Posts: 1,294
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If you were to run say, 3:55 gears Your RPMs would drop for better crusing at Highway speeds. (IE a litter better MPG while crusing @ 55-68 mph) BUT you will suffer at take off, with your 35" tires. Your Raptor will be slugish, and the $$ cost to change your front & rear gears, would most likely out weigh the small savings of $$ with a few less RPM's.
You would have to suffer at red lights and every start from a dead stop, and drive 100K miles to break even in the $$ column.
Just my .02 ??
randy
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Ford Fleet/Comm Truck Mngr. RAPTORS, Custom F-650 Trucks, Shelby GT500 & KR Mustangs, FORD GT's. 406 544-6891 fordfun_mt@yahoo.com Thanks Randy
I'd rather be riding my motorcycle thinking about God, than in church thinking about my motorcycle. ~unknown~
-----------
2008 Harley Softail Custom 105th Aniv Limited Edition
2006 Harley F-250 Black w/Blue Flames FOR SALE $23K
1.3 million miles OTR and still Truckin!!
If you can read this, thank a teacher. If it's in English, thank a soldier.
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02-05-2012, 08:59 PM
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#5 (permalink)
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Ford Senior Master Technician
Join Date: Feb 2011
Location: Montana
Posts: 448
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I've heard of few eco-boost guys wanting to do gear changes hotline stated modification that will void your warranty. Weather or not its an empty threat or not.
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02-05-2012, 09:01 PM
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#6 (permalink)
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FRF Supporting Member
Join Date: Aug 2011
Location: Jacksonville, FL
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I'd be curious if you'd even get better gas mileage with a 3:55 gear.
I'd guess the vast majority of your road time would have to be highway to see an improvement.
You have over 6000lbs to get moving. I'd guess you'd be spending too much time out of the optimal power band to see the mileage benefit, not to mention the loss of performance (fun factor).
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02-05-2012, 09:03 PM
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#7 (permalink)
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Diablo Runner
Join Date: Aug 2010
Location: Lake City, Mi
Age: 54
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Originally Posted by Deinonychus
I'd curious if you'd even get better gas mileage with a 3:55 gear.
I'd guess the vast majority of your road time would have to be highway to see an improvement.
You have over 6000lbs to get moving. I'd guess you'd be spending too much time out of the optimal power band to see the mileage benefit, not to mention the loss of performance (fun factor).
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Ya it would improve it but at the cost its not efficient like Randy said...
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02-05-2012, 09:06 PM
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#8 (permalink)
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Junior Member
Join Date: Jan 2012
Location: Chicago & S.E WIsconsin
Age: 34
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I was aware of the mileage that the truck gets. I was cruising home tonight And realized the drop in economy was due to the 2500 RPM running at 85 for long periods of time. When I run 74 in a 65 I'm at 2100 to 2200 if the RPMs were lower my mileage would be better. Just because I ask about gears and mpg doesn't mean I should have bought another truck. Is there another truck that looks as bad ass and handles so superbly and is as comfortable as the raptor that gets better MPGs. If there is then I must of missed it when I was looking for a new truck.
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2012 Raptor supercrew 6.2 .. HIDs, Strobes, SS works headers w/ cat delete borla and corsa mufflers. AFE and 5 star tune, Escort 9500ci, tinted 20% all around, LakeLand topper
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02-05-2012, 09:14 PM
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#9 (permalink)
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Ford Professional
Join Date: Sep 2010
Location: St Louis, MO
Age: 50
Posts: 1,294
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Your drop in economy IS due to
running at 85 for long periods of time.............
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Ford Fleet/Comm Truck Mngr. RAPTORS, Custom F-650 Trucks, Shelby GT500 & KR Mustangs, FORD GT's. 406 544-6891 fordfun_mt@yahoo.com Thanks Randy
I'd rather be riding my motorcycle thinking about God, than in church thinking about my motorcycle. ~unknown~
-----------
2008 Harley Softail Custom 105th Aniv Limited Edition
2006 Harley F-250 Black w/Blue Flames FOR SALE $23K
1.3 million miles OTR and still Truckin!!
If you can read this, thank a teacher. If it's in English, thank a soldier.
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02-05-2012, 09:26 PM
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#10 (permalink)
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Junior Member
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I know. I drive back and forth from Chicago to Wisconsin on a regular basis. I have been doing the drive for years I94 which is what I drive on you can haul ass with ease. The truck likes to go fast and doesn't really seem like your going fast. I was just seeing if the change was possible. I plan on doing a supercharger and didn't think I would suffer from a stop if the truck had different gears. Most of the driving is highway. I'm extreamly happy with it. I was just exploring the idea. Thanks
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__________________
2012 Raptor supercrew 6.2 .. HIDs, Strobes, SS works headers w/ cat delete borla and corsa mufflers. AFE and 5 star tune, Escort 9500ci, tinted 20% all around, LakeLand topper
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