preferred gears with 33s
Unregistered User
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theres a huge difference.
he just didnt want to accept the fact that his truck needed a gear change, or wanted to pay someone to do it.
I noticed a 300 rpm increase from 3.73s and 4.10s. First gear was the only gear i could tell had gained anything but i am a 4 banger with 31s, 4.10s are still to high, i cruise at 2100rpm at 55.
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Joined: Aug 2007
Posts: 148
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From: Plainville, MA
More gear...
I went from the stock 3.73's to 4.10's while still running 31's last year and could definitely feel the difference. However, shortly after changing the gears, I moved up to 33" x 11" ProComp Extreme M/T's and now wish that I had gone to 4.56's. It's not cheap to do both diff's (in my case anyway) so do it right the first time! I would go 4.56's - you'll still get decent mileage but have enough gear to make the truck scoot! Even with an Eaton M90 on top of my 4.0, I can't spin these big muds on asphalt... it digs pretty good offroad but not on the street. Just another opinion but from a "Been there - Done that" Ranger owner!
ok one more question...i have a 7.5 rearend and my trucks 2wd so i would only have to change one set, but would 4.56 gears fit in the carrier that i already have??? i once read a guy posting that he had to change the differential encasement to fit the new gears and was wondering if this would really be an issue
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Joined: Aug 2007
Posts: 148
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From: Plainville, MA
Gears
ok one more question...i have a 7.5 rearend and my trucks 2wd so i would only have to change one set, but would 4.56 gears fit in the carrier that i already have??? i once read a guy posting that he had to change the differential encasement to fit the new gears and was wondering if this would really be an issue
http://www.trsfabandoffroad.com/products/gears.htm (scroll down to Ford 7.5")
...shows four different manufacturers for the Ford 7.5" diff ranging from 3.73's to 5.13's. I'm not familiar with Yukon but the other three have been around for years. Pick one and do a search elsewhere for price comparisons. If they're made for the 7.5 I would think they'd fit without any changes. Watch and see if anyone else pipes in with an answer.
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Joined: Jun 2004
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From: Firey depths
For the cost of changing gears going from 3.73 to 4.10 isnt worth it. And there really isnt a huge change with them. Your only stepping up 10% in gearing, which for the cost to change gears is a waste.
Unregistered User
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if the truck came with 3.73 and you go up 2 inches in tire size then you need to re-gear to at least 4.10. or should i say "should"
i ran 4.10's on 32's for a while, it sucked, the automatic was always hunting for overdrive. stock tire size was 235-75-15 (29" tire) stock gear was 4.10.
i changed to 4.56's last spring and also changed to 33's, at this point it is still not as good as stock, but its doable.
there is a noticeable difference, you may not notice, but your PCM will!
Member
Joined: May 2004
Posts: 4,926
Likes: 1
From: Lewiston, Maine
why would ford put 4.10's in trucks with 3.0's and 3.73's in trucks with 2.3's?
if the truck came with 3.73 and you go up 2 inches in tire size then you need to re-gear to at least 4.10. or should i say "should"
i ran 4.10's on 32's for a while, it sucked, the automatic was always hunting for overdrive. stock tire size was 235-75-15 (29" tire) stock gear was 4.10.
i changed to 4.56's last spring and also changed to 33's, at this point it is still not as good as stock, but its doable.
there is a noticeable difference, you may not notice, but your PCM will!
if the truck came with 3.73 and you go up 2 inches in tire size then you need to re-gear to at least 4.10. or should i say "should"
i ran 4.10's on 32's for a while, it sucked, the automatic was always hunting for overdrive. stock tire size was 235-75-15 (29" tire) stock gear was 4.10.
i changed to 4.56's last spring and also changed to 33's, at this point it is still not as good as stock, but its doable.
there is a noticeable difference, you may not notice, but your PCM will!
while my 2.5 had 3.73s
and my 4.0 has 4.10s
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Joined: Oct 2006
Posts: 1,193
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From: wher ever uncle sam wants
i have a 4.0L Auto on 33"s and running 4.56gears, can still pull 20mpg on the highway.
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
i have a 4.0L Auto on 33"s and running 4.56gears, can still pull 20mpg on the highway.
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
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Joined: Jun 2004
Posts: 15
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From: Firey depths
why would ford put 4.10's in trucks with 3.0's and 3.73's in trucks with 2.3's?
if the truck came with 3.73 and you go up 2 inches in tire size then you need to re-gear to at least 4.10. or should i say "should"
i ran 4.10's on 32's for a while, it sucked, the automatic was always hunting for overdrive. stock tire size was 235-75-15 (29" tire) stock gear was 4.10.
i changed to 4.56's last spring and also changed to 33's, at this point it is still not as good as stock, but its doable.
there is a noticeable difference, you may not notice, but your PCM will!
if the truck came with 3.73 and you go up 2 inches in tire size then you need to re-gear to at least 4.10. or should i say "should"
i ran 4.10's on 32's for a while, it sucked, the automatic was always hunting for overdrive. stock tire size was 235-75-15 (29" tire) stock gear was 4.10.
i changed to 4.56's last spring and also changed to 33's, at this point it is still not as good as stock, but its doable.
there is a noticeable difference, you may not notice, but your PCM will!
Member
Joined: Oct 2006
Posts: 1,193
Likes: 0
From: wher ever uncle sam wants
i guess i should sue Ford then for false advertising? vin tag is wrong, window sticker when i bought it is wrong too... the gears i took out of the rear end must be wrong too... thanks for letting me know... im gonna be rich now
i have a 4.0L Auto on 33"s and running 4.56gears, can still pull 20mpg on the highway.
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
dont let people tell ya you will get crappy gas mileage with 4.56gears if they dont have them ha. the low end power is awesome! and still enough grunt to pass people on the highway. at freeway speeds im only 300rpm higher than i was factory with 3.55gears
go 4.56
He has the 4.0L it came with 3.55s there are a bunch of 4.0s like that.
lol not really, because your right.
So 04edge says 4.56 with 33's and still NOT at stock power...So 4.88 is ideal for 33's??
Im going with 4.56 sometime
I have 3.73 and 32's and my trans can find overdrive just fine
Im going with 4.56 sometime
I have 3.73 and 32's and my trans can find overdrive just fine
Last edited by ranger_1999; Oct 18, 2008 at 03:07 PM.
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Joined: Aug 2007
Posts: 148
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From: Plainville, MA
http://www.therangerstation.com/tech...tirechart.html
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Joined: May 2005
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From: Garner, NC
sucked even worth drivin around for a week on 33s with 3.55s.. HAHA
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Joined: Oct 2006
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From: wher ever uncle sam wants
haha i drove my truck from cali back to texas after i got the suspension put on with 33s and 3.55s and a bed full of stock parts and tires haha talk about NO power on the highway at all
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