3.73 gears?

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Old 05-22-2007, 11:19 PM
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Default 3.73 gears?

will 3.73s that were bought for a buddys 1994 Lt1 but never installed, work for on my 99 auto ls1?
Old 05-22-2007, 11:40 PM
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Yes, they are the same.
Old 05-22-2007, 11:47 PM
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Originally Posted by DMcRacer
Yes, they are the same.
How can you tell him this with such little information? If your buddies car was an auto as well then yes. There are 2 different types of gears for your car. One is a two series and one is a 3 series.
Old 05-22-2007, 11:52 PM
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yes my buddys 94 was an auto, sorry...and whats the difference between the 2 series carrier and 3?these were never installed and he totalled the car out, so hes giving them to me for free!
Old 05-22-2007, 11:56 PM
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Originally Posted by Pwebbz28
How can you tell him this with such little information? If your buddies car was an auto as well then yes. There are 2 different types of gears for your car. One is a two series and one is a 3 series.
You are correct, sort of. An auto can be a 2 or 3 series. 2:73 is 2 series and 3:23 is 3 series.
Old 05-22-2007, 11:59 PM
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if mine came with 3.23 from factory, i would then have a 3 series correct? so would his fit no matter if it were a 2 series without problem, or would I need to purchase something else? would I benefit going from 3.23 to 3.73 gearing at all?
Old 05-23-2007, 12:01 AM
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I believe the gears would have to be for a 3 series carrier.
Old 05-23-2007, 12:03 AM
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I know one type is thinner than the other. I would have to look around to remember. If i had an auto with 3.23 already i would do a converter first. You will get more from a converter than anything. Especially wheel spin
Old 05-23-2007, 12:36 AM
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if his are for a 2 series carrier, and you have a 3 series carrier..then im not sure if they would work.but if u had a 2 series and he had a 3 series then you would need a spacer.. alot of people do not advise to use this spacer...

i have motives 373s for a 3 series carrier and i need some for a 2 series cuz my car came with gay 273s...if you find out his are for a 2 series..shoot me a pm
Old 05-23-2007, 12:42 AM
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will do stangkiller!
Old 05-23-2007, 01:28 AM
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Originally Posted by indigo28
if mine came with 3.23 from factory, i would then have a 3 series correct? so would his fit no matter if it were a 2 series without problem, or would I need to purchase something else? would I benefit going from 3.23 to 3.73 gearing at all?
i recently went from 323s to 373s. I can tell its a lil quicker now, indigo28!
Old 05-23-2007, 07:39 AM
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Originally Posted by indigo28
if mine came with 3.23 from factory, i would then have a 3 series correct? so would his fit no matter if it were a 2 series without problem, or would I need to purchase something else? would I benefit going from 3.23 to 3.73 gearing at all?
The gears are weaker, and with the right stall you will never need them. Gearing a car makes up for a lack of power. Most people gear cars more when the cams dont make good torque. IE, TREX Cammed cars.

Mike's car had 3.23's with a 2.7 str on his Yank PT4000 stall. That car was murderous from a low roll and ran 10.7's at 3500 lbs stock motor.
Old 05-23-2007, 07:39 AM
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Originally Posted by Pwebbz28
I know one type is thinner than the other. I would have to look around to remember. If i had an auto with 3.23 already i would do a converter first. You will get more from a converter than anything. Especially wheel spin
Excellent advice Frosty.
Old 05-23-2007, 07:47 AM
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Originally Posted by 1936FordPU
The gears are weaker, and with the right stall you will never need them. Gearing a car makes up for a lack of power. Most people gear cars more when the cams dont make good torque. IE, TREX Cammed cars.

Mike's car had 3.23's with a 2.7 str on his Yank PT4000 stall. That car was murderous from a low roll and ran 10.7's at 3500 lbs stock motor.
unless you have crappy 273s
Old 05-23-2007, 07:49 AM
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Originally Posted by stangkiller2005
unless you have crappy 273s
Nope. A converter company can use those gears and make a converter that rips with those gears. I know of a car now that has 2.73's that runs HARD NA and its using a hard hitting 3800 stall.
Old 05-23-2007, 01:28 PM
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Originally Posted by 1936FordPU
Nope. A converter company can use those gears and make a converter that rips with those gears. I know of a car now that has 2.73's that runs HARD NA and its using a hard hitting 3800 stall.
i guess everybody has different oppinions.. but i hate my 273s... so im going with 373s... ive never seen anybody go from 342s to 273s
Old 05-23-2007, 01:45 PM
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Originally Posted by stangkiller2005
i guess everybody has different oppinions.. but i hate my 273s... so im going with 373s... ive never seen anybody go from 342s to 273s
Turbo cars do.
Old 05-23-2007, 01:51 PM
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Originally Posted by 1936FordPU
Turbo cars do.
i dont think were talkin bout cars making crazy hp rite now. cars with 800+ hp mite make scince cuz of the lack of traction and mph... but cars that that runs 11s and up...even 10s 373s or 410s are fine...
Old 05-23-2007, 02:38 PM
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You will always accelerate faster with lower gears provided: A) You can get traction and B) you will not "run out of gear" at the end of the quarter mile. Simple physics here, lower gear = more applied force to the tire which = faster acceleration.

3.73 is a great gear if you do alot of street driving and is a nice compromise between streetability and great track times. Just my opinion..




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