Gearing help
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
My recommendations are previously stated, above.
I have 4.10s in my F250 (2WD) and I'd like to drop it down to 3.73s... Or go nuts and slap on an Autofab 3-inch lift and 35s.
I have 4.10s in my F250 (2WD) and I'd like to drop it down to 3.73s... Or go nuts and slap on an Autofab 3-inch lift and 35s.
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Cargo Master
Joined: May 2015
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From: Garland, Tx
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Senior User
Joined: Dec 2014
Posts: 288
Likes: 2
From: Pocahontas, Iowa.
This 465 CID beast didn't even blink when I changed the ratio. I was running 4.10's. I opted for 3.73's
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
This 465 CID beast didn't even blink when changed the ratio. I was running 4.10's. I opted for 3.73's
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
Our Bumpsides pre-dated the national speed limit reduction to 55 MPH. That was passed by Nixon in 1974. As a kid, I remember when the highway speed limit in Arkansas (pre-NMSL speed limit) was 75 MPH.
Fleet Mechanic
Joined: May 2006
Posts: 1,567
Likes: 72
From: Wichita, KS
I have 4.11's in my 4X4 with 33" tires. I have an Overdrive trans, but can run 60-65 in 3rd and only turn about 2500 rpm. Kick it up into OD and rpms drop to about 1700.
Edit, You didn't say what engine you have. I've got a small block with an aftermarket cam and intake that performs best around 2500 rpm and up. For a stock application in say a 390 or 360, you may want a steeper gear like a 3.73 or so to keep you in your peak torque range when at highway speeds. I use mine as more of a play toy and around town driver and hardly ever drive more than 10-15 minutes at highway speeds at a time. If you do the same, then I say 4.11's should be just fine.
Edit, You didn't say what engine you have. I've got a small block with an aftermarket cam and intake that performs best around 2500 rpm and up. For a stock application in say a 390 or 360, you may want a steeper gear like a 3.73 or so to keep you in your peak torque range when at highway speeds. I use mine as more of a play toy and around town driver and hardly ever drive more than 10-15 minutes at highway speeds at a time. If you do the same, then I say 4.11's should be just fine.
Fleet Mechanic
Joined: Oct 2005
Posts: 1,369
Likes: 7
From: Gainesville, GA
Lead Driver
Joined: Jul 2011
Posts: 8,679
Likes: 191
From: On the Edge of the Desert
Originally Posted by wrhinehart
This 465 CID beast didn't even blink when I changed the ratio. I was running 4.10's. I opted for 3.73's
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
Went from 9 MPG on the road almost 12.
Was taching 3500 at 65, now taching 3500 and 75.
It makes for a more modern truck.
Remember that back then the Maximum Speed limit was 55.
"I can't drive 55."
Who sang that.? (Don't google it.)
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