quote:

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Originally posted by triple b:
well since u DD that id do 3.55 50 miles a day make a shittty mpg even worse if u go more gear than that

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3.55-3.73 is only a difference of 100 rpm or so on the freeway.
 

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Posted by need-a-cage (Member # 5415) on :
 
What do you want to do with the car? I would go 3.73 or 3.55. If you are going to drag race, then 3.73's. When I was stock and on street tires, my 3.55's gave me the same ET as my 3.08's. First spun more and I had to hit 4th too close the finish line. With the 3.08's I could hold 3rd. The 3.55's feel great on the street though. I would not want a lower 1st gear on the street, but 3.73's would work better at the track with that power level. If you are under 110mph in the 1/4, then 3.90's would be ideal for the track, but 1st would spin like crazy on the street and be pretty useless. If you have a world class T-5 or TKO 600 with the tall 1st gear, then the 3.90's would be okay. If you are sticking with the stock ratio T-5 or TKO 500 or Tremec 3550, and drive a lot on the street, then I would go with 3.73's. That way you can use more of 4th at the track than I did with the 3.55's and that power level.
 

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Posted by 89bluenotch (Member # 7454) on :
 
I like my 3.73's I daily with them..... Who gets into this game and worries about MPG??
 

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Posted by 86redGT (Member # 6961) on :
 
I had 355's and 410's on my 86,

The 355's were definitely much better to drive around town and on the freeway on. 410's were obviously better for the track but for street driving it was a lot of shifting and the freeway mileage suffered. Personally I think it really is personal preference.
 

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Posted by rayski25 (Member # 11363) on :
 
Ok thanks for all the input guys, right now I'm leaking towards 3.08 chp gears or 3.73s ither way I'll be happy to see the change! Thanks again!
 

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Posted by Bluemaxx88 (Member # 11046) on :
 
Go 373 bro ull be happy 373 FtW!!!
 

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Posted by 91blackonblack (Member # 11591) on :
 
3.55's for the win.i love them on street an freeway.i had 3.73's a hell of a ruff feeling on the freeway.but 3.55"s ftw u cannot go wrong with them because there street an freeway an racing.all in one

[ August 02, 2012, 01:41 AM: Message edited by: 91blackonblack ]
 

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Posted by SwEeT 03 Gt (Member # 10283) on :
 
4.10's for a N/A mustang
dont fear the gear!
 

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Posted by 98 ROUSH (Member # 10309) on :
 

quote:

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Originally posted by SwEeT 03 Gt:
4.10's for a N/A mustang
dont fear the gear!

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quote:

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Originally posted by Wildfire532FB:
How much RPM increase will i get going from 3.54 to 3.73?

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quote:

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Originally posted by rayski25:
3.08 chp gears

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quote:

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Originally posted by need-a-cage:
If you have a world class T-5

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quote:

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Originally posted by nitrous_bob:
in my opinion go 4.10 or just leave it stock, doing less gear loses you performance and NOTHING else

MPG is not even affected, its how you drive it

every one of my 5.0's got 21-24 MPG if i drove it cool whether they had 2.73 or 4.10

each bump in gearset will run you about 250 rpms higher then the one below it in any given gear. thats a rough number, but your looking at 1000 rpms higher total in any given gear if you swap from 2.73 to 4.10

here are some facts, to dispell some of the retarded rumors you may have heard...mostly from people who used 3.55 and want you to waste your money too cuz they feel bad about themselves

1) you will NOT have to shift into 5th in a 1/4 mile with 4.10's

2) you will NOT tach 4k doing 60 you tach about 3000 doing 70-75

3) you will NOT get 10 mpg, well you will,,,,cuz you'll be in it all the time. but if you drive cool you'll do 21 mpg

4) a stock 3.73 car CANNOT lift a tire on slicks, but a stock 4.10 car WILL lift about 6" (that alone should sway you)

so although the gearing is close...4.10 is optimal for a NA car looking to squeeze every tenth it can

its not worth bumping a single gearset, so make sure you do it right the first time

correcting the speedo is either easy , complicated, or impossible

your '89 if it is a 5 speed is easy, if its an AOD...its , for practical measures...impossible

correcting the speedo "PROPERLY" means using the correct driven gear with your current drive gear

an AOD is an 8 tooth drive gear and can only be corrected to 3.55's with a 23t driven gear which is incorrect as that white 23t gear is from a jeep, and has the wrong pitch for either T5 or AOD...but its worse for AOD

so technically an AOD can only be corrected to 3.27s with the purple 21t

T5's are 7t for the older ones and 8t for the newer

an '89 is a 7t

the biggest diff with a AOD V T5 is that the drive gear is a ring gear just c-clipped on the output shaft on a T5 and requires disassembly to do it...but an AOD has the drive gear machined into the output shaft. i cant even tell you if an output shaft was ever made that is a 6t or 7t

anyways..... the best thing you can do if your T5 is ever apart is put a black 6t drive gear, then you can correct to 4.10's with a black 20t

but you can...correct an '89 trans with a non ford 23t and it will work. if you drive alot of miles...you will chew it up tho, so be prepared for that. or just use the red 21t and be about 7% in error but not chew it up

thats my 2 cents, im on my 6th stang and i will NEVER use anything but 4.10

*** and before someone says "i used 3.55 and it was way better than stock" ***

well of course it was.....and if a starving ethiopian found a rotten big mac he'd eat it and love it, but it doesnt make it delicious. it just makes it "better than starving"

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quote:

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Originally posted by nitrous_bob:

quote:

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Originally posted by rayski25:
3.08 chp gears

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um...what ?

hey i can sell you one of those "ultra rare" world class t5's if you want.... waaaaay better than the t5 you have already

ok sorry...how did you go from

"i wanna bump up to something good"

to...

" i wanna swap out for the same gears i already have "

check your door tag...do you even know what gears are in it now?

"ax" code

m=2.73
z=3.08
e=3.27

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quote:

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Originally posted by nitrous_bob:

quote:

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Originally posted by need-a-cage:
If you have a world class T-5

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AHHHHHHH !!! i get to triple post, but I HAVE TO !!!!!!

ok so i was joking about the whole "i'll sell you a world class thing"...... cuz i had to assume that 20 years after they didnt even sell this trans anymore people knew the scoop, and i was trying to make a point about the so called "CHP 3.08 gears"

but i'll give you a hint....
1) he said '89 mustang
2) he said 5.0

so yeah....pretty much i can deduce that he has a world class T5

im not busting your ballz.....dont get me wrong

i just thought those days were long gone, but you gave me a laugh

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shit Im speechless, almost
that was the excellent, lets see, you busted out the people who were just writing somethin they heard from someone who told someone else that told them, gave real fact, and very precise info,
, and the little starving metaphor was the nail in the coffin, had me dyin! right then good show id like tickets to the next

 

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Posted by 94 N.C.F. GT (Member # 3946) on :
 
390's or 410's wouldnt go any lower
 

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