Gear Question????? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 11 Old 06-03-2009, 03:12 AM Thread Starter
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Gear Question?????

I'm about to build the rearend in my car and was wondering if a 355 gear will be ok? C4 trans 28" tall tires, stock botom end 302, B&G Kit with a 70mm turbo, TW Heads, Street heat intake, Anderson B-31 cam. I have a 373 in the car now, but it deffinatly needs to come out!

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post #2 of 11 Old 06-03-2009, 09:34 AM
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Usually the 3.27s are preached. What are your rpms in the 1/4 as it is now? What is your max rpm? I would say 3.55s would be okay but many preach the 3.27s like I said before. Good luck.

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post #3 of 11 Old 06-03-2009, 10:39 AM
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I started with a 3.73, C4, 28" tire. Was OK, but definitely annoying for street driving (no overdrive). Went to a 3.55, made a nice improvement on the street, but ended up breaking the input shaft off the Dynamic C4 twice (on the street!). Dynamic said C4 no like heavy car (3400 w/driver), tight converter (3K), turbo (lots of low end torque), and low rear gear. Ended up going to a TH400 with the 3.55 and went 9.teens at 147. Next swapped in a set of 3.27's and picked up a little ET and MPH, plus made the street driving even nicer. I love the 3.27 in there now, but am tempted to try my stock 3.08 just to see what it does.

93 LX, 8 sec twin turbo street car
http://www.youtube.com/watch?v=Rx8FF1eW79Y
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post #4 of 11 Old 06-03-2009, 12:26 PM
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go with the 3.27..

did you ever get your converter replaced?

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post #5 of 11 Old 06-03-2009, 03:28 PM
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3.08's ... and 26's .

1990 Notchback stock bottom end , TW's , F cam , Systemax and 66mm in the works.
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post #6 of 11 Old 06-03-2009, 03:36 PM
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I have the 327's and a 26" tire but I think 308's can work too.
...Or possibly 327's and a 28".
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post #7 of 11 Old 06-03-2009, 06:37 PM
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3.27's FTW!!!!

1990 Mustang GT
Dart IE 363, PT78 HPS, Built 4R70W, BS3, BBRC Fuel system, TeamZ, ect.....
Tuned by Bob Kurgan
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post #8 of 11 Old 06-04-2009, 12:45 AM Thread Starter
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Quote:
Originally Posted by flyin_hawaiin View Post
go with the 3.27..

did you ever get your converter replaced?
No I haven't replaced it yet. Thats next after the rearend!
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post #9 of 11 Old 06-04-2009, 07:18 PM
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Not to hi-jack, but I wanted to ask a related question. My car has 3.55's and I run 17" M/T Street Radials at the track. My first time out, it didn't really mph where I was hoping it would. Some of it was half of 1st gear (AOD) was with no boost. I need to learn how to launch it better to get it into boost quicker. @ 3500 #'s and 420rwhp it went 90mph (1/8th). Would this be any different with 3.27's? I'm guessing that getting the car into boost quicker would increase mph. Are the 3.55's hurting me?

'91LX Vert- Stock Shortblock, Stock Cam, Cobra Intake, Edelbrock Performer 1.9's, 42#er's, PMAS 3", AOD, 3.27 gears, B&G 70mm Single, 3500lbs w/ me
Best 1/8- [email protected] with a 1.64 60'
Best 1/4- [email protected] with a 1.66 60'
Funniest 1/4- [email protected] LOL
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post #10 of 11 Old 07-02-2009, 03:36 PM
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'91LX Vert- Stock Shortblock, Stock Cam, Cobra Intake, Edelbrock Performer 1.9's, 42#er's, PMAS 3", AOD, 3.27 gears, B&G 70mm Single, 3500lbs w/ me
Best 1/8- [email protected] with a 1.64 60'
Best 1/4- [email protected] with a 1.66 60'
Funniest 1/4- [email protected] LOL
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post #11 of 11 Old 07-02-2009, 04:06 PM
 
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3.27 w/ a 28" tire would be great, thats what I am doing..
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