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Old 07-04-2011, 04:56 PM   #1
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What size gear for rear end?

What size gear should I use for the rearend, so that i can get good acceleration but not really hurt my gas mileage for highway driving?
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Old 07-04-2011, 05:10 PM   #2
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Re: What size gear for rear end?

Im happy with my 3.73's since I do alot of highway driving. Others will recommend 4.10's also.
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Old 07-04-2011, 05:14 PM   #3
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Get 3.90.
Is ur car 5 spd or auto?
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Old 07-04-2011, 07:26 PM   #4
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Its a auto
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Old 07-04-2011, 07:33 PM   #5
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Re: What size gear for rear end?

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Originally Posted by BlackBeauty01 View Post
Its a auto
I would go with the 3.73s. The 4.10s will have a noticeable effect on gas mileage. The 3.73s will give a nice gain in acceleration. When i had 4.10s, i was cruising about 500rpm higher than stock on the highway to give you an idea
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Old 07-04-2011, 11:07 PM   #6
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Quote:
Originally Posted by tigerfan2771

I would go with the 3.73s. The 4.10s will have a noticeable effect on gas mileage. The 3.73s will give a nice gain in acceleration. When i had 4.10s, i was cruising about 500rpm higher than stock on the highway to give you an idea
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Old 07-05-2011, 10:05 AM   #7
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Re: What size gear for rear end?

you wont be able to up the gearing without losing high way MPG's 4.10s for auto works pretty good but you will lose MPG's (a couple on the highway)
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Old 07-05-2011, 06:28 PM   #8
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Thanks for the help
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Old 07-06-2011, 07:54 AM   #9
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Thanks
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Old 07-10-2011, 11:19 PM   #10
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Depends mostly on what you are wanting to do with the car
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Old 07-14-2011, 10:51 AM   #11
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Re: What size gear for rear end?

I had 4.10 in my black mustang it was fine on the highway but don't take it out of od it will run 4k it runs about 3k with 4.10 running at 60
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Old 07-14-2011, 11:51 AM   #12
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I myself would do 3.90. That's what I have and I still get almost 16 mpg all in town.
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Old 07-14-2011, 11:53 AM   #13
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But I guess I don't know how the autos are. Are they a 4 speed like the camaros or did they do it right and do 5
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Old 07-14-2011, 11:56 AM   #14
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Quote:
Originally Posted by t0t4lbl4ck0ut
But I guess I don't know how the autos are. Are they a 4 speed like the camaros or did they do it right and do 5
4 with overdrive
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Old 07-14-2011, 11:57 AM   #15
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Quote:
Originally Posted by t0t4lbl4ck0ut
But I guess I don't know how the autos are. Are they a 4 speed like the camaros or did they do it right and do 5
Thats why i pulled my auto out and put a 5 spd tranny in lol
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Old 07-14-2011, 12:01 PM   #16
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Good lol I guess I don't think any kind of rear gear would help highway mpgs in the autos. That's a no brainer but atleast in a 5 speed you've got 5th which is a dog gear but a extra gear none the less
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Old 07-14-2011, 12:02 PM   #17
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With my auto I'm putting 4.10s idc about gas or cruzin on the highway, its a performance car, to me that's how it's supposed to be lol, but now you said you have a 5speed, alot of ppl go with 3.73s with a standard. If u want something in between then go with 3.90s
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Old 07-14-2011, 12:11 PM   #18
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Yea I'd do 3.90 cause unless you have alot of hp the 4.10 will kill you. You loss to much too end and get passed up after your reaching higher gears. With my 3.90 I've noticed you don't really have a gear for a 40 roll lol
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Old 07-14-2011, 03:16 PM   #19
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Re: What size gear for rear end?

you need to make sure who ever installs them is highly recommended and knows what they are doing... this doesnt happen for most and they regret it as they get whine or messed up gears.
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Old 07-14-2011, 07:11 PM   #20
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Re: What size gear for rear end?

The quicker acceleration with 4.10s far out weigh just a couple mpgs lost on the highway, if you were gas mileage conscious; you wouldn't have bought a mustang gt.
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Old 07-14-2011, 08:29 PM   #21
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Quote:
Originally Posted by 02gtkev
The quicker acceleration with 4.10s far out weigh just a couple mpgs lost on the highway, if you were gas mileage conscious; you wouldn't have bought a mustang gt.
+1
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Old 09-02-2011, 09:00 PM   #22
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Re: What size gear for rear end?

definately 373s, unless u plan on doing alot of racing,then go with 410s
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