Gears Help i have 3.73 want to go to 4.10 or even 4.56???

Ranger Sport Honduras · May 15, 2011

well i went from 3.73 to 4.10 on my 2.5.
first with 30"s and now with 31"s

all i can say is i love it and i wont go back to 3.73

u could get an axle with 4.10 gears, but since u have small tires, ull need to upgrade a bit so u still get some speed. some 225/70R15 will do a good improvement imo.

94 lngbd · May 15, 2011

Captain Ledd said:
Since your in town delivering things I'd go with at least the 4.10. 4.56 still might be a little on the steep side on a truck sporting the 14's (but that has some wiggle room).

It might be easier or probably just as expensive to do the 8.8" swap compared to regearing the 7.5", especially if it's from a Ranger. you'll get the bigger brakes too.

What size tires are you currently running? I can do some comparisons.

Didn't you stick 31's on the back of your rig? And I can only assume your talking about the 2.3L.

I hope you can clear a few things up because that statement makes my head hurt.

Im referring to OP wanting to go to 4.10 with 14" tires ,his off the line would be quicker ,but he will be shift out of gears sooner & his top speed would be lower & his Fuel Economy will be much less. Thats only if he stays with 14" stock size tires. With larger tires like 31s then 4.10s would be great.

Captain Ledd · May 15, 2011

94 lngbd said:
Im referring to OP wanting to go to 4.10 with 14" tires ,his off the line would be quicker ,but he will be shift out of gears sooner & his top speed would be lower & his Fuel Economy will be much less. Thats only if he stays with 14" stock size tires. With larger tires like 31s then 4.10s would be great.

Oh, I see.

Even still, quick shifts are not that bad. My DD is a 2001 Saturn SL, I shift into 5th at 45mph. How bad can it really be? It's just shifting, push in clutch, move lever. The only people I have heard complain about any of that are those who drive auto's.

And his fuel economy will be higher. He has stated he does alot of stop and go driving (City) with a very limited top speed, or at least doesn't drive fast for very long. Besides, it's a friggen 2.3L, let it rev. Gears will make it much easier to get moving contributing to more CITY mpg.

And HWY fuel economy will not be that much less (even IF it is less), it's only going to change a few hundred RPM at top speed. again, 2.3L.

I've got 235/75R15's on mine and I'm going from 3.73 to 4.56. So it'll rev about 3K at 70 but it doesn't matter much because I'm stuck in 4th around 3K anyways to get anywhere. The truck does very few stints on the highway and I'm usually pulling something. It only changes my RPM 550 higher at 70 MPH. His will be closer to 250 with 3.73 to 4.10, at speed.

The clutch. The OP mentioned this as a concern and it's very legitimate. I have roasted my clutch maneuvering trailers out in the field, my tires had all the grip in the world, but my clutch kept breaking loose. Deeper gears will ease the amount of stress on the clutch to get the truck moving.

The OP said he want's more off the line performance, gears will do that. It all depends on how far he's willing to take it and put up with it. The only merit your argument has is the fuel economy, and really that's slanted more on the larger engined side of things and also the highway.

Picture this, "4cylinders 2.3L @ 3,000 RPM" compare that to "8 cylinders, 4.6L @ 1,500 RPM". Doesn't sound so bad now does it? Gears have everything going for him.

Gear it and thrash it.

greatwolf222 · May 16, 2011

well the door says the axle code is 87 or 86 i dont know i swaped the doors a while back but i remember that it was a 3.73 7.5'' rear end it wouldnt suprise me if it has 3.43 or 3.08
its pretty bad in the city i feel like i have to ride the clutch so long just to get started

greatwolf222 · May 16, 2011

Captain Ledd said:
Oh, I see.

Even still, quick shifts are not that bad. My DD is a 2001 Saturn SL, I shift into 5th at 45mph. How bad can it really be? It's just shifting, push in clutch, move lever. The only people I have heard complain about any of that are those who drive auto's.

And his fuel economy will be higher. He has stated he does alot of stop and go driving (City) with a very limited top speed, or at least doesn't drive fast for very long. Besides, it's a friggen 2.3L, let it rev. Gears will make it much easier to get moving contributing to more CITY mpg.

And HWY fuel economy will not be that much less (even IF it is less), it's only going to change a few hundred RPM at top speed. again, 2.3L.

I've got 235/75R15's on mine and I'm going from 3.73 to 4.56. So it'll rev about 3K at 70 but it doesn't matter much because I'm stuck in 4th around 3K anyways to get anywhere. The truck does very few stints on the highway and I'm usually pulling something. It only changes my RPM 550 higher at 70 MPH. His will be closer to 250 with 3.73 to 4.10, at speed.

The clutch. The OP mentioned this as a concern and it's very legitimate. I have roasted my clutch maneuvering trailers out in the field, my tires had all the grip in the world, but my clutch kept breaking loose. Deeper gears will ease the amount of stress on the clutch to get the truck moving.

The OP said he want's more off the line performance, gears will do that. It all depends on how far he's willing to take it and put up with it. The only merit your argument has is the fuel economy, and really that's slanted more on the larger engined side of things and also the highway.

Picture this, "4cylinders 2.3L @ 3,000 RPM" compare that to "8 cylinders, 4.6L @ 1,500 RPM". Doesn't sound so bad now does it? Gears have everything going for him.

Gear it and thrash it.

so you think i could get away with 4.56? in maybe a 8.8 rear end?

and how hard would it be to find a 8.8 whit a 4.56 and posi

RangerNtheWoods · May 16, 2011

Originally Posted by nb11
heck, just go ahead and go with 4.56's, 35's, sas, and v8 swap. Then you can deliver pizza anywhere, thus maximizing your profits!

agreed!

Captain Ledd · May 16, 2011

greatwolf222 said:
so you think i could get away with 4.56? in maybe a 8.8 rear end?

and how hard would it be to find a 8.8 whit a 4.56 and posi

Tell me what tire size your running and I'll post up some numbers.

4.56 will definitely be quick, but with anything on a 14" rim you really need to be prepared on how it will effect your top end.

greatwolf222 · May 17, 2011

i have brand new snow tires in the back 225/70/R14 i think

Captain Ledd · May 17, 2011

greatwolf222 said:
i have brand new snow tires in the back 225/70/R14 i think

Alrighty then (that sounds about right, they did offer a few variants on the 14" tire sizes), all numbers are approximate and will differ slightly from the real world.

Stock: 3.73's
4th

60 MPH - 2850 RPM
70 MPH - 3325 RPM

5th

60 MPH - 2250 RPM
70 MPH - 2625 RPM

--------------------------------------------
4.10's
4th

60 MPH - 3125 RPM
70 MPH - 3650 RPM

5th

60 MPH - 2475 RPM
70 MPH - 2890 RPM

--------------------------------------------
4.30's (8.8" only)
4th

60 MPH - 3275 RPM
70 MPH - 3825 RPM

5th

60 MPH - 2600 RPM
70 MPH - 3025 RPM

--------------------------------------------
4.56's
4th

60 MPH - 3475 RPM
70 MPH - 4075 RPM

5th

60 MPH - 2750 RPM
70 MPH - 3200 RPM

Again, I've done a slight bit of rounding but the numbers should hold fairly true.

So cruise around at those engine RPM's and see how high you can tolerate driving down our nations fine interstates. I threw in the 4.30's just for giggles and grins. I honestly believe the 2.3L is good for 3K sustained RPM's.

As you can notice, if you really don't drive faster than 60 MPH, you actually could make 4.56's work. But that depends on your driving style. Just be prepared if you ever do drive 70+. That drastic of a gear will definitely effect your highway mileage at faster speeds.

I do suggest the 8.8 swap though, even if (really especially) it's from a Ranger. It'll be damn near bolt in and won't have the spider gear issues a 7.5" has. And multiplying the torque that much through the diff even with a 2.3L is going to shorten their life span.

A stock 8.8 likely will not have deeper than 4.10, but supposedly 4.56's are out there. To my knowledge, NOBODY has found one. On the upside, 4.10s are fairly common with a touch of patience.

If you decide to do further mods down the road, the 8.8" will allow you much more options.

I priced out the differences heavily for my axle build, interestingly enough, for a 7.5" vs 8.8", the costs for a complete rebuild with comparable parts (gears, install kit, differential, brakes, wheel bearings, seals, everything) was literally the exact same cost. You might as well start with a stronger rear end.

Anything else?

greatwolf222 · May 17, 2011

wow...no that every thing i could have ever asked for on this thread my hats off to you, :icon_thumby:

thank you

Gears Help i have 3.73 want to go to 4.10 or even 4.56???

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