Gears for an Eco and where to get them
03-11-2014, 10:10 PM
#1
Senior Member
Thread Starter
Gears for an Eco and where to get them
I have stock 3.73 gear in a 2012 Eco with a 6 inch lift and 35's. What gears do you recomend and where to get them. Most I have read on here are for the 5.0.
03-11-2014, 11:44 PM
#2
Senior Member
You may not want to hear this, but with an ECO, and 3.73's, I wouldn't change a thing for 35" tires. That's an incredibly powerful truck as it sits. You have a ton of low-end torque, a very low 1st gear, and a six-speed. Running that truck with 3.73's is like running a 285 (33") tire with 3.55's. Power shouldn't be an issue.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
Last edited by driver444; 03-11-2014 at 11:47 PM.
03-12-2014, 08:35 AM
#3
Senior Member
Thread Starter
You may not want to hear this, but with an ECO, and 3.73's, I wouldn't change a thing for 35" tires. That's an incredibly powerful truck as it sits. You have a ton of low-end torque, a very low 1st gear, and a six-speed. Running that truck with 3.73's is like running a 285 (33") tire with 3.55's. Power shouldn't be an issue.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
Last edited by boost74; 03-12-2014 at 08:46 AM.
03-12-2014, 11:03 AM
#4
Senior Member
You have to keep in mind that these newer generation trucks (2009-2014) with the six speed transmission, enable the truck (whatever your setup) to have the same ability as the previous generation trucks, except with the next gear ratio higher. I have a post on this if you do a search.
In other words, a 2009 with 5.4 6 speed and 3.55 gears will tow about the same as a 2008 5.4 4 speed with 3.73 gears. This is because of a lower first gear in the transmission.
Likewise, a 2009+ truck with 6 speed and 3.73's will tow what the previous truck did with 4.10 gears.
If you look at the MAX TOW option, it's 3.73 gears. I ran 35's on an older truck with 3.73's with no issues.
Basically, I'd say 4.56 is way too low for 35's. ( they aren't THAT big), and the difference you'll notice between 3.73's and 4.10's barely justifies the cost, if at all.
You have the most powerful and torquiest engine ever put in a Ford half-ton. That truck will still spin the tires with 35's.
In other words, a 2009 with 5.4 6 speed and 3.55 gears will tow about the same as a 2008 5.4 4 speed with 3.73 gears. This is because of a lower first gear in the transmission.
Likewise, a 2009+ truck with 6 speed and 3.73's will tow what the previous truck did with 4.10 gears.
If you look at the MAX TOW option, it's 3.73 gears. I ran 35's on an older truck with 3.73's with no issues.
Basically, I'd say 4.56 is way too low for 35's. ( they aren't THAT big), and the difference you'll notice between 3.73's and 4.10's barely justifies the cost, if at all.
You have the most powerful and torquiest engine ever put in a Ford half-ton. That truck will still spin the tires with 35's.
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boost74 (03-13-2014)
03-13-2014, 03:55 PM
#5
Senior Member
Thread Starter
You have to keep in mind that these newer generation trucks (2009-2014) with the six speed transmission, enable the truck (whatever your setup) to have the same ability as the previous generation trucks, except with the next gear ratio higher. I have a post on this if you do a search.
In other words, a 2009 with 5.4 6 speed and 3.55 gears will tow about the same as a 2008 5.4 4 speed with 3.73 gears. This is because of a lower first gear in the transmission.
Likewise, a 2009+ truck with 6 speed and 3.73's will tow what the previous truck did with 4.10 gears.
If you look at the MAX TOW option, it's 3.73 gears. I ran 35's on an older truck with 3.73's with no issues.
Basically, I'd say 4.56 is way too low for 35's. ( they aren't THAT big), and the difference you'll notice between 3.73's and 4.10's barely justifies the cost, if at all.
You have the most powerful and torquiest engine ever put in a Ford half-ton. That truck will still spin the tires with 35's.
In other words, a 2009 with 5.4 6 speed and 3.55 gears will tow about the same as a 2008 5.4 4 speed with 3.73 gears. This is because of a lower first gear in the transmission.
Likewise, a 2009+ truck with 6 speed and 3.73's will tow what the previous truck did with 4.10 gears.
If you look at the MAX TOW option, it's 3.73 gears. I ran 35's on an older truck with 3.73's with no issues.
Basically, I'd say 4.56 is way too low for 35's. ( they aren't THAT big), and the difference you'll notice between 3.73's and 4.10's barely justifies the cost, if at all.
You have the most powerful and torquiest engine ever put in a Ford half-ton. That truck will still spin the tires with 35's.
03-15-2014, 12:27 AM
#6
You may not want to hear this, but with an ECO, and 3.73's, I wouldn't change a thing for 35" tires. That's an incredibly powerful truck as it sits. You have a ton of low-end torque, a very low 1st gear, and a six-speed. Running that truck with 3.73's is like running a 285 (33") tire with 3.55's. Power shouldn't be an issue.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
I'd leave it alone, and put the cash in your pocket.
Nevertheless, if you choose to do the swap anyway, Randy's Ring and Pinion is where I get my stuff. (ringpinion.com)
Also, the axle in the rear is a 9.75" Ford, and the front is a 8.8" Ford. Engine doesn't matter.
03-15-2014, 10:03 AM
#7
Senior Member
37's would warrant the 4.56 gears IMO. 4.10's might be ok, but again, I wouldn't bother to change from 3.73 to 4.10. The only reason I recommended the OP not change gears for 35's is because the price is too high for the benefit. 37's put you in another category.
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04-02-2014, 02:49 AM
#8
Agreed! I run 35's on 3.73 and I have just about every performance upgrade available (minus turbo upgrade, NOs, turbo manifolds) and I easily pull 410 rwhp and 525 rwtq. 4.56 on a 35 is too steep. Driver is right, there's not that much of a difference between a 3.73 and a 4.10. Save your money on gears and put it towards a twin turbo upgrade (whenever one comes available!)