Gear Ratio

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Jul 16, 2006 | 08:28 PM

94fordlover

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Gear Ratio

I have a 94 f-150 with a inline 6 4x4. I need to get a new set of gears because mine are going to grenade soon. I want to put 3.73 gears in it. Is this worth putting that gear ratio in with that motor? Will I have more low end take off? Also what else do I need to know? I know its a ford 8.8 inch rear end. I also have to get gears for the front as its 4x4. What do I need to know what I need for that? I also know I need a installation kit. My biggest worry its getting all the splines and all the other information correct. Can someone give me a link or someone who knows exactly what I need? Thanks.

http://cgi.ebay.com/ebaymotors/Aubur...06753835QQrdZ1

Would this be worth getting?

Last edited by 94fordlover; Jul 16, 2006 at 08:30 PM.

Jul 16, 2006 | 10:24 PM

tim73

Mountain Pass

Joined: Feb 2003

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If it has 3.55 gears right now, then you wont get that big of a difference with 3.73's.

Jul 17, 2006 | 08:55 AM

Fair 96

Laughing Gas

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Id stick with the 355 but a 410 may help some..

Jul 17, 2006 | 10:03 AM

Kemicalburns

Hotshot

Joined: Jul 2002

Posts: 14,285

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From: Bend,OR

are you planning on running larger tires. what is your current tire size? Gears are something you will need professionally installed so let them worry about all the little stuff. all you need is what gear ratio you want and if any lockers are wanted as well.

if you plan on running 33's figure a 4.10 ratio. for 35's 4.56. and since you have OD tranny getting the gears setup now for larger tires later wont be a big deal. the cost of having this done makes it hard to do again if you know what i mean.

Jul 17, 2006 | 10:16 AM

lvin4jc

Fleet Mechanic

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From: Rapid City, SoDak

http://www.off-road.com/toyota/taco/...gearchart.html

Charts like these are pretty helpfull for this stuff.

Jul 17, 2006 | 03:13 PM

94fordlover

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IDK what it is right now. Its a inline six with a ford 8.8. Im not worried about installation because my gf's brother is a mechanic and he builds hot rods. I just was thinking there was a higher then 3.55. If it is 3.55 then I would go with 4.11's. Someone know what I have for a ratio?

Jul 17, 2006 | 03:14 PM

94fordlover

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Im also running 265/75/16's on it

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Jul 17, 2006 | 03:36 PM

andym

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From: Bonita Springs FL

If you are not running larger tires than that on it, you are wasting your money, IMO. You won't see much of a difference going from 3.55 to 3.73.

But you might have 3.08's in there - we need to find out what your current ratio is.

Jul 17, 2006 | 04:32 PM

#10

94fordlover

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12 2.73 3800 FORD REG
18 3.08 3800 FORD REG
19 3.55 3800 FORD REG
25 4.10. 5300 FORD REG
29 3.55 5300 FORD REG
35 4.10. 6250 FORD REG
39 3.55 6250 FORD REG
45 4.10. 7400 FORD REG
49 3.55 7400 FORD REG
65 4.10. 8250 FORD REG
69 3.55 8250 FORD REG
72 4.63 11000 DANA REG
73 5.13 11000 DANA REG
H5 4.10. 3800 FORD LIMITED SLIP
H9 3.55 3800 FORD LIMITED SLIP
H8 3.08 3800 FORD LIMITED SLIP
B5 4.10. 5300 FORD LIMITED SLIP
B9 3.55 5300 FORD LIMITED SLIP
C5 4.10. 6250 FORD LIMITED SLIP
C9 3.55 6250 FORD LIMITED SLIP
D5 4.10. 7400 FORD LIMITED SLIP
F5 4.10. 8250 FORD LIMITED SLIP

I have axel code 18. Now how much of a difference will I see in gas, performance and such.

Jul 17, 2006 | 04:35 PM

#11

94fordlover

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I also have to do the front. I live up the road from a local salvage yard. I might see if they have a posi rear end with 3.73 or 4.10's. But do u think its worth the jump?

Jul 17, 2006 | 04:46 PM

#12

bigblack302

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you will feel a big difference with the 3.73. My friend had a 300ci in a 2x4 with a 4spd manual. I'm not sure what ratio he had in thier but he was turning alot of rpm doing 70mph. I wouldn't recommend going with a higher ratio if that's your case

Jul 17, 2006 | 05:03 PM

#13

andym

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Joined: Mar 2002

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From: Bonita Springs FL

You won't find a limited slip axle in a junkyard that works and has either a 3.73 or 4.10 ratio. Those ratios are rare, and the limited slip clutches are worn out by the time they hit the boneyard.

Going from 3.08 to 3.73 will be a big jump - you'll notice a big difference in power. Whether or not you should go that low depends on whether or not you have OD. If you have a 94 truck, you should have overdrive, so 3.73's will work for you. Even 4.10 isn't that low with overdrive.

Jul 17, 2006 | 05:10 PM

#14

94fordlover

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I do have OD What would be my top speed for 3.73 and 4.10, I might just go to me salvage yard and see if they have good gears, then buy an install kit. My gf brother also works at a shop and can prob get the gears for cheap. I also need the the front end gears as its 4x4. If I can get the gears for cheap, and the install kit, I can save myself a ton of money. Im not really worried about doing smoke shows, its more of having a lot more grunt low end. The truck has to be pushing at least 275 low end torque, but I sure as hell dont feel it. It takes like 12 secs to get to 65mph.