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4:10 rearends vs. 3:73... #7725468
11/23/22 09:17 PM
11/23/22 09:17 PM
Joined: Dec 2006
Posts: 8,510
Northern Illinois
M
MChewk Offline OP
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MChewk  Offline OP
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Northern Illinois
Which has the better gas mileage all things being equal?
Checking out used trucks and looking for the best mileage out of a 3/4 ton.
Not planning on pulling any big loads just trapping gear and critters.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725469
11/23/22 09:18 PM
11/23/22 09:18 PM
Joined: Dec 2006
Posts: 1,142
Sugar Grove, WV
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JTfromWV Offline
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JTfromWV  Offline
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Joined: Dec 2006
Posts: 1,142
Sugar Grove, WV
3:73

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725488
11/23/22 09:37 PM
11/23/22 09:37 PM
Joined: Dec 2006
Posts: 8,510
Northern Illinois
M
MChewk Offline OP
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MChewk  Offline OP
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Northern Illinois
I figured...of course the truck that has the 4: 10 is the one I want...color and preference.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725490
11/23/22 09:40 PM
11/23/22 09:40 PM
Joined: Dec 2006
Posts: 1,142
Sugar Grove, WV
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JTfromWV Offline
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Posts: 1,142
Sugar Grove, WV
GM usually puts 4.10 in the gas model and 3.73 in the diesel.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725500
11/23/22 09:52 PM
11/23/22 09:52 PM
Joined: Jan 2018
Posts: 3,693
MN
D
Donnersurvivor Offline
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Donnersurvivor  Offline
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Joined: Jan 2018
Posts: 3,693
MN
4.10 would be lower gear ratio than 3.73. 4.10 would be better for heavy hauling, faster acceleration etc.

Re: 4:10 rearends vs. 3:73... [Re: Donnersurvivor] #7725526
11/23/22 10:23 PM
11/23/22 10:23 PM
Joined: Dec 2006
Posts: 19,412
St. Louis Co, Mo
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BigBob Offline
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St. Louis Co, Mo
Originally Posted by Donnersurvivor
4.10 would be lower gear ratio than 3.73. 4.10 would be better for heavy hauling, faster acceleration etc.

And for OR, 3.73's for highway and around town.


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Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725599
11/24/22 12:17 AM
11/24/22 12:17 AM
Joined: Oct 2011
Posts: 1,651
Idaho
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bearcat2 Offline
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Joined: Oct 2011
Posts: 1,651
Idaho
Also depends on the gears in the transmission. 3/4 tons usually have a lot of power, so you won't need the 4.10s for the extra power, but they will be nicer when trying to putt through the rough stuff without killing it or slipping the clutch (in a manual). Depending on how high the gears are in the transmission the 3.73s will likely get better fuel mileage on the highway/freeway. I've got an old Toyota I put 4.88s in, I love it off road, and it works fine on the 55 mph highways around here, but it is not a good freeway rig.

Unless you are doing a lot of freeway driving at 80 mph I would vote for the 4.10s. They both should do fine and have fairly comparable gas mileage at 55-60 if you are mainly driving two lane highways.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725603
11/24/22 12:27 AM
11/24/22 12:27 AM
Joined: Nov 2011
Posts: 20,611
New Hampshire
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Nessmuck Offline
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Nessmuck  Offline
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Joined: Nov 2011
Posts: 20,611
New Hampshire
Did he say " Best Mileage out of a 3/4 ton Truck "....hahahahahahaha

There is no such a thing...


It is better to die on your feet than to live on your knees.
Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725613
11/24/22 12:57 AM
11/24/22 12:57 AM
Joined: Aug 2021
Posts: 1,473
Over there.
F
Flicker Shad Offline
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Posts: 1,473
Over there.
Originally Posted by MChewk
Which has the better gas mileage all things being equal?
Checking out used trucks and looking for the best mileage out of a 3/4 ton.
Not planning on pulling any big loads just trapping gear and critters.

Then why a 3/4 instead of half?

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725615
11/24/22 01:00 AM
11/24/22 01:00 AM
Joined: Nov 2018
Posts: 154
Mo
T
Trapper5123 Offline
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Trapper5123  Offline
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Joined: Nov 2018
Posts: 154
Mo
Get what ever you want the gear to mpg will be close enough it doesn't matter.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725617
11/24/22 01:01 AM
11/24/22 01:01 AM
Joined: Nov 2018
Posts: 154
Mo
T
Trapper5123 Offline
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Joined: Nov 2018
Posts: 154
Mo
You'll hate both at 70 on the interstate

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725654
11/24/22 05:22 AM
11/24/22 05:22 AM
Joined: Aug 2010
Posts: 353
Ontario
K
Kermit Offline
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Kermit  Offline
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Joined: Aug 2010
Posts: 353
Ontario
What is final ratio? Tire size , overdrive all change things. A tall set of rubber on 4.10 would help.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725674
11/24/22 05:56 AM
11/24/22 05:56 AM
Joined: Apr 2007
Posts: 52
Chesapeake, Virginia
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Doug Lee Offline
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Doug Lee  Offline
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Joined: Apr 2007
Posts: 52
Chesapeake, Virginia
Aren't transmissions usually 1:1 in high gear?
Doug
*

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725769
11/24/22 07:38 AM
11/24/22 07:38 AM
Joined: Mar 2013
Posts: 1,893
chelsea,wi
keets Offline
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chelsea,wi
I had an '03 Chevy HD 6.0l with 4:10, then bought my '13 Chevy HD 6.0l with 3:73...can't really say it was much different....now- the new '21 with the 6.6l and 3:73 is quite a bit better road trip gets 19- 20 mpg


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Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725773
11/24/22 07:44 AM
11/24/22 07:44 AM
Joined: Feb 2021
Posts: 1,145
Wisconsin
M
Mad Scientist Offline
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Wisconsin
My 96 f250 with the 7.3 diesel has 3.50 gears and gets 20 mpg,pulls everything.My other 96 f250 has 3.73 and gets 15 mpg.I would never buy a 4.10 unless you drive very little.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725822
11/24/22 08:37 AM
11/24/22 08:37 AM
Joined: Dec 2006
Posts: 8,510
Northern Illinois
M
MChewk Offline OP
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MChewk  Offline OP
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Northern Illinois
Thanks for the replies guys.

Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725866
11/24/22 09:38 AM
11/24/22 09:38 AM
Joined: Sep 2020
Posts: 63
AZ
A
AZ2020 Offline
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AZ2020  Offline
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Joined: Sep 2020
Posts: 63
AZ
Diesel 3.73
Gas 4.10 or 4.30.

I put 4.56 in my truck to haul the camper knowing hwy unloaded mpg would suffer. Towing mpg stayed the same butů I'm towing 65-70 now instead of 50-55. Also a lot more fun to drive! cool

Any 3/4 or 1t truck will cost you one way or another it all works out the same. Really comes down to what headache you prefer.


AZ2020
Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725938
11/24/22 11:07 AM
11/24/22 11:07 AM
Joined: May 2011
Posts: 6,993
Montana
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beartooth trapr Offline
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Joined: May 2011
Posts: 6,993
Montana
Chevy, 2015 2500 with 4:10's that said, I put cat back exhaust on it 2 year's back.
Helped Miles to gallon.

Lit foot helps also, run ac/Delco filters Air.

Full synthetic rear/front differential lube.

Pull 5th wheel camper/ small trailer for wheeler.

Of course in hills/ mountains.


Let me sugar coat this
Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725941
11/24/22 11:10 AM
11/24/22 11:10 AM
Joined: May 2011
Posts: 6,993
Montana
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beartooth trapr Offline
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Joined: May 2011
Posts: 6,993
Montana
Old 69er Chevy has 4:56 gears it's a scary screaming machine at 65mph laugh
The more gas I buy the better I feel.


Let me sugar coat this
Re: 4:10 rearends vs. 3:73... [Re: MChewk] #7725953
11/24/22 11:30 AM
11/24/22 11:30 AM
Joined: Aug 2011
Posts: 39,485
james bay frontierOnt.
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Boco Offline
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james bay frontierOnt.
Had 4 10 rear end in a ranger once.
Great off road-pig on gas on the highway.

New one got 4 55


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