GEARS

Buzzstang · 02-01-2004, 05:24 PM

From the factory mustangs usually come with a 2.73 gear ratio unless you have an svo which in '84 they come out with 3.45 and in '85 and '86 3.73 was standard.Â* Yoe had 2 options for different gearing in mustangs: 3.08 for 5-spd cars and 3.27 for autos.Â* Changing the gears is one of the first things that i would do to a stang.Â* Then we get into choices of different ratios.Â* so here is my opinion on this subject.Â*Â* First you have to decide what you want to do with your mustang.Â* Is it going to be a daily highway driver?Â* A Sunday Driver? Will you be stuck in the city(stop and go traffic)?Â*Â*or just a weekend dragracer?Â* You basically have 6 choices for gears:Â* 2.73, 3.08, 3.27, 3.55, 3.73, and 4.10.Â*Â*Â* the first 3 gear ratios are better for top-end, high speed performance, and the all important fuel economy to the highway commuters. 3.73 and 4.10Â*are better forÂ*acceleration andÂ*low endÂ*responsiveness.Â* the gear ratio that i have left out wasÂ*3.55.Â* it is kind of an all around gear you get fuel economy and still have the power to pass cars at will on the free way.

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Added by MD to clean up another sticky:
Gear calculator website thread:
http://www.mustangforums.com/m_99648/tm.htm

vfast · 02-01-2004, 08:17 PM

buzz...gears could be an option for the factory as well up to a 3:73 I saw this when I ordered mine in 89

Buzzstang · 02-01-2004, 08:53 PM

ok my sources did not inform me of that. anyhting else top add?

vfast · 02-02-2004, 11:44 AM

yes..they make a 3.90 gears

tchamber · 02-04-2004, 07:09 AM

So let me get this strait...my 95GT has 2.73s? No way it's that tall.

Buzzstang · 02-04-2004, 11:15 PM

true unless it is an automatic or was ordered different.

badd_co · 02-06-2004, 02:47 AM

how do i figure out what gears i have now. 

i have an '89 that came with a 2.3 and 5 speed. but that is about to come out and a 351w and C6 going in.

Buzzstang · 02-06-2004, 02:59 AM

MORE THAN LIKELY YOU HAVE A7.5 REAR END AND I WOULD RECOMEND THAT YOU CHANGE IT OUT FOR AN 8.8 REAR. THE GEARS ARE PROUBALLY 2.73. I WOULD GO BACK WITH SOME 3.55 BECAUSE YOU WULL NOT HAVE ANY OVERDRIVE UNLESS THIS IS JUST GOING TO BE A RACE CAR.

badd_co · 02-06-2004, 05:15 AM

3.55 is what i want but still need to know how to identify what i have. would hate to go buy something that i may already have.

TheGmKiller331 · 02-07-2004, 02:54 AM

Theres nothing wrong with that 7.5 rearend as long as you dont go running slicks on it!And being that it was a 2.3 and a 5 speed it most likely has anywhere from 3.08's to 3.55's.My 1989 2.3 with an A4LD had 3.73's from the factory.And i am still currently running the 7.5 and have been for 3 years now behind a 331 with no problems at all.

Now thats not to say everyones is that good.If you can or you happen to run acrossan 8.8for cheap i would get it for sure and atleast keep it until the 7.5 gave out.But running around on the street on regular radials you shouldnt have a problem.

To tell whats in your rear look at the rear axle tag or lift the car and count how many times the drive shaft turns in comparison to the rear wheels.<edited><editID>TheGmKiller331</editID><editDate>38023.9970833333</editDate></edited>