3.55 Rear end gears, awaiting purchase

Sinatra · November 9th, 2011, 05:13 PM

I have stumbled upon 3.55 gears from a 2001 cobra. Will the go in my 94 gt?

ReverendDexter · November 9th, 2011, 05:25 PM

Yup.

Sinatra · November 9th, 2011, 05:31 PM

Talked him down to $40. Brand new. Score.

ryanw · November 9th, 2011, 05:41 PM

Originally Posted by Sinatra

Talked him down to $40. Brand new. Score.

That's an awesome price. I have 3:55 brand new still in the box that I bought 10 years ago a still haven't put them in. Lol

I'm thinking about selling them. But there's no way in hell I'd let them go for 40 bucks. I'm thinking about going with 3:73 now. Not sure yet what I'm going to do

Sinatra · November 9th, 2011, 08:47 PM

Originally Posted by ryanw

That's an awesome price. I have 3:55 brand new still in the box that I bought 10 years ago a still haven't put them in. Lol

I'm thinking about selling them. But there's no way in he'll I'd let them go for 40 bucks. I'm thinking about going with 3:73 now. Not sure yet what I'm going to do

I wanted 3.73 but this was too good to pass up. 3.55 should be totally sufficient. Have been keeping my eyes pealed to craigslist since I got the car.

I just remembered that I changed the rear gasket, all new fluids when I got it. What a waste that was lol

ReverendDexter · November 10th, 2011, 10:48 AM

Originally Posted by ryanw

That's an awesome price. I have 3:55 brand new still in the box that I bought 10 years ago a still haven't put them in. Lol

I'm thinking about selling them. But there's no way in hell I'd let them go for 40 bucks. I'm thinking about going with 3:73 now. Not sure yet what I'm going to do

Yeah, the set of 3.73s I just got in had been sitting in my garage for about 7 years, hahaha.

If you've already got 3.27s (per your sig), I don't think the jump to 3.55s would be worth it from a seat-of-the-pants perspective. Now, if you've done the math for the quarter, and know that 3.73s would add a shift, 3.55s would be a better choice, but that's about the only situation in which I think you're better off with the higher gears.

Basically 3.55s are only getting you a 8.5% increase, where 3.73s get you 14%.

nolife · November 10th, 2011, 11:54 AM

Are you installing them yourself? If not...

3.55 gears, $40. Install, $300-400 depending on your area, total cost. $440
New 3.73 gear, $180, $300-400 depending on your area, total cost. $580, only $140 more.

You already have a 3.27, 3.55 is not a big jump at all, 200 rpm cruising, 300 at shift point. If you are tweaking your track end rpm and tire swaps can't make up the difference and the 3.55 gets you where you want to be then go for it, other than that, a waste.

Buy the good deal on the 3.55's, assume they are in good shape, resell them for the average going rate on Corral and then buy some 3.73 or 4.10's.

Sinatra · November 10th, 2011, 04:20 PM

Originally Posted by nolife

Are you installing them yourself? If not...

3.55 gears, $40. Install, $300-400 depending on your area, total cost. $440
New 3.73 gear, $180, $300-400 depending on your area, total cost. $580, only $140 more.

You already have a 3.27, 3.55 is not a big jump at all, 200 rpm cruising, 300 at shift point. If you are tweaking your track end rpm and tire swaps can't make up the difference and the 3.55 gets you where you want to be then go for it, other than that, a waste.

Buy the good deal on the 3.55's, assume they are in good shape, resell them for the average going rate on Corral and then buy some 3.73 or 4.10's.

Installing myself

. I'm going from stock to 3.55s...should be a nice difference.

fogged306 · November 10th, 2011, 04:29 PM

Originally Posted by ReverendDexter

Now, if you've done the math for the quarter, and know that 3.73s would add a shift, 3.55s would be a better choice, but that's about the only situation in which I think you're better off with the higher gears.

Basically 3.55s are only getting you a 8.5% increase, where 3.73s get you 14%.

You've got to look at that in a different perspective. Acceleration is what gets you through the 1/4 faster and 3.73's will accelerate the car faster than 3.55's will. Just because you will have to add a shift doesn't mean that you'll go slower, quite the opposite. Ideally, you want to be at the top of 4th gear in a 5 speed car when you cross the traps. Depending on engine, trans, and tire size that may or may not make 3.73's a better choice, but usually lower power cars benefit from more gear in the 1/4 and get you closer to the top of 4th at the traps.

fogged306 · November 10th, 2011, 04:30 PM

Originally Posted by Sinatra

Installing myself . I'm going from stock to 3.55s...should be a nice difference.

What is your stock ratio? If it's 3.27, you're going to be disappointed like nolife suggested.

ryanw · November 10th, 2011, 05:59 PM

I think every one is getting me and Sinatra confused. I'm not sure what his stock gear is. But I'm the one that has the 3:27 in my car now. And I also have 3:55 new still in the box. I was thinking of getting rid of the 3:55 and getting some 3:73. Would I be better off throughing in the 3:55, or would I be better off getting the 3:73.

I have a 5 speed, and I'm will end up supercharging it wary next year. The car will not see that much track time. Knowing all this, what do you think

Sinatra · November 11th, 2011, 11:27 AM

Originally Posted by fogged306

What is your stock ratio? If it's 3.27, you're going to be disappointed like nolife suggested.

I'm pretty sure stock 5.0gt are 2.73 gears.

mustangmaniac95 · November 11th, 2011, 11:35 AM

Originally Posted by Sinatra

I'm pretty sure stock 5.0gt are 2.73 gears.

stock 5.0 with 5spd is 3.08

ReverendDexter · November 11th, 2011, 11:51 AM

Originally Posted by mustangmaniac95

stock 5.0 with 5spd is 3.08

Not exactly. 3.08s were a factory option, but the stock gears were 2.73s.

jessemachone · November 11th, 2011, 12:47 PM

perhaps 3:08's came w stick. my lx coupe is a 5 spd and came w 3:08. i swapped in a whole other rear from a 92 lx auto vert and it was a 2.73.

mustangmaniac95 · November 11th, 2011, 01:03 PM

i bought my car all stock and the original owner got the factory option 3.27 gears

ReverendDexter · November 11th, 2011, 01:11 PM

At least with foxbodies, 3.27s were a factory option, but only behind automatics. Guess that changed with SN95s.

jessemachone · November 11th, 2011, 02:44 PM

or it could be a gt vs lx thing.

ReverendDexter · November 11th, 2011, 03:15 PM

Originally Posted by jessemachone

or it could be a gt vs lx thing.

Huh? No. For foxbodies (at least aero cars), 2.73s were stock, 3.08s were a factory option, and 3.27s were a factory option behind automatics. GT vs LX had nothing to do with it.

ELEX · November 11th, 2011, 06:37 PM

Originally Posted by ryanw

That's an awesome price. I have 3:55 brand new still in the box that I bought 10 years ago a still haven't put them in. Lol

I'm thinking about selling them. But there's no way in hell I'd let them go for 40 bucks. I'm thinking about going with 3:73 now. Not sure yet what I'm going to do

swap me out your 327 rear for my 373 rear, bam! done

November 9th, 2011, 05:13 PM	#1
Sinatra Regular Join Date: Oct 2011 Posts: 53 iTrader: 0 reviews	3.55 Rear end gears, awaiting purchase I have stumbled upon 3.55 gears from a 2001 cobra. Will the go in my 94 gt? __________________

November 9th, 2011, 05:25 PM	#2
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Yup. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

November 9th, 2011, 05:31 PM	#3
Sinatra Regular Join Date: Oct 2011 Posts: 53 iTrader: 0 reviews	Talked him down to $40. Brand new. Score. __________________

November 10th, 2011, 11:54 AM	#7
nolife MM Fanatic 91GT, 88GT, 02GT Join Date: Dec 2006 Posts: 3,057 Blog Entries: 3 iTrader: 0 reviews	Are you installing them yourself? If not... 3.55 gears, $40. Install, $300-400 depending on your area, total cost. $440 New 3.73 gear, $180, $300-400 depending on your area, total cost. $580, only $140 more. You already have a 3.27, 3.55 is not a big jump at all, 200 rpm cruising, 300 at shift point. If you are tweaking your track end rpm and tire swaps can't make up the difference and the 3.55 gets you where you want to be then go for it, other than that, a waste. Buy the good deal on the 3.55's, assume they are in good shape, resell them for the average going rate on Corral and then buy some 3.73 or 4.10's. __________________ Last edited by nolife; November 10th, 2011 at 12:00 PM.

November 10th, 2011, 05:59 PM	#11
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	I think every one is getting me and Sinatra confused. I'm not sure what his stock gear is. But I'm the one that has the 3:27 in my car now. And I also have 3:55 new still in the box. I was thinking of getting rid of the 3:55 and getting some 3:73. Would I be better off throughing in the 3:55, or would I be better off getting the 3:73. I have a 5 speed, and I'm will end up supercharging it wary next year. The car will not see that much track time. Knowing all this, what do you think __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears Last edited by ryanw; November 10th, 2011 at 07:45 PM.

November 11th, 2011, 01:03 PM	#16
mustangmaniac95 Hardcore Enthusiast 1995 Mustang GT Join Date: Nov 2010 Location: New Orleans Posts: 1,192 iTrader: 2 reviews	i bought my car all stock and the original owner got the factory option 3.27 gears __________________ 95 GT: JLTcai, Flow40s, o/r Xpipe, lowering springs, cobra brakes, cobra rims, sbfc, shocks/struts, trickflow170 heads (1.6rr), cobra intake, custom cam, 75mm MAF, 75mmtb, bbk shorty headers, 24#injectors, 3.73 gears, mach 1 chin spoiler.

November 11th, 2011, 01:11 PM	#17
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	At least with foxbodies, 3.27s were a factory option, but only behind automatics. Guess that changed with SN95s. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

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