Which Gears

[LS1 Junkie]

3.73's or 4.10's for an A4 gas millage dosen't matter but freeway manners do a little bit!

[BIG D's SS]

The rule of thumb is 3.73's for a4 and 4.10's for m6. They equal out as far as performance for each. Still friendly.

[MadSeason]

If you dont care about highway get the 4.10s

[MNR-0]

3.91. 4.11s are too small and break easily. No way could you trans-brake a 4.11 ring-n-pinion.

[jonszo6]

Get the 3.73 gm motive gears.......

[slo4mula]

I think that independent suspension is a fantastic idea but i don't think it would be worth it.

[jimbo98z]

I think that independent suspension is a fantastic idea but i don't think it would be worth it.

What? :thinkin:

[mrr23]

did both. the 4.10 gears were real fun to have for sudden acceleration. 4th with converter locked felt like 3rd unlocked. highway sucked rpm wise. 3.73 better overall. i miss the low speed acceleration of the 4.10 though.

[Ed Blown Vert]

Torque converter first

[tigersport14]

do 373 gears make is accelerate faster?

[mrr23]

do 373 gears make is accelerate faster?

compared to 3.23, yes. compared to 4.10, no.

[tigersport14]

what comes stock on a t/a?

[mrr23]

what comes stock on a t/a?

depends on options and transmissions.

M6 = 3.42
A4 = 2.73 or 3.23

[tigersport14]

sorry for all these questions, but whats an M6 and A4?

[mrr23]

Manual 6 speed
Automatic 4 speed

[tigersport14]

oh ok, so how do i know if im getting 2.73 or 3.23?

[SSmoky01]

Get the 3.73 gm motive gears.......

+1:yup:

[Wesman]

I voted 4.10, but I didn't realize you had an A4. Considering that, I say go with 3.73s at the most. Any more gear that that and your engine will be screaming on the highway, and your fuel economy will drop significantly in general.

As someone else mentioned, general rule is 3.73s for autos and 4.10s for M6s.

[shady milkman]

do the ws6 a4 come with the 3.23?

[Wesman]

do the ws6 a4 come with the 3.23?

Yep - T/A WS6's with the A4 came with 3.23's ;)

[shady milkman]

THANK GOD!!!!..but i should still switch to 3.73..i'm just not sure if i'm gear head ready enough to change it yet :nana:

[djvaly]

I have '99 TA A4, so do I have the 2.73 or 3.23 as stock? would it be in the
user's manual? I doubt it.. please help :thinkin:

[djvaly]

never mind, I found the answer on a different thread but wanted to share with you anyways.
look at the service parts specification sticker on the door,
"Look at the RPO codes (on the side of the door jamb, or in the glovebox). If you see GU5 that's a 3.23 car and a 3 series carrier. If you see GU2 it is a 2.73 car and a 2 series carrier."

I have a GU5 = 3.23 gear, so I will go with 3.73... any ideas on 1/4 mi time gain? .1, .2?

[mattycakes98TA]

I have 2.73 would I notice a big difference switching to 3.73 ...in the 0-60 quarter?

[mattycakes98TA]

..what is the series carrier?

[djvaly]

for a 3.x gear the series carrier is 3. for 2.x it is 2.

[hiramsuito]

I want to switch from 2.73 to 3.73 but I've heard that I need some kind of adapter or spacer, is it right?.

In case of needing it, would you guys please recommend me any good brand?

[LS2Tuner]

..what is the series carrier?

That is refering to what gear the carrier was originally equiped with........Different thickness ring gears depending on "series carrier".
Now there is SOO MANY manufactures you can get a spacer for the thin gear if needed for your carrier.


3.91's ALL THE WAY!!!!

[djvaly]

If I have this idea right, a torque converter (stall converter) provides additional torque multiplication equivalent to a higher numerical gear ratio..
so if I were to do 3.73 gears why would I need to do 3000-3200 stall converter? would I do one or the other? please explain.. Thanks!

[LS2Tuner]

The converter NEEDS to match the cam.........If the cam doesn't start tp make power until 3000rpm a stockl con. that locks up at 1400rpm isn,t going to let the motor "free wheel" to 3000 before it locks up........
When you see a car at the stop light jumping around trying to roll forward while idleing thats because some dumbass has a tight ass stock con. on a big cam.:yup:
Gears are only going to help it rpm faster not rev higher before it moves!!!! There fore if you have a stock cam anything over a 2000 isn't going to do shit!!!
Stock cam change gears NOT converter!!!

[djvaly]

I see, so in other words. I'd do the 3.73 gears first, then get a mild cam and then put in the 3200 street fighter stall.. in that order?..

[LS2Tuner]

I see, so in other words. I'd do the 3.73 gears first, then get a mild cam and then put in the 3200 street fighter stall.. in that order?..

Yes but don't put a # on the stall until you match it with your cam choice!!!:yup:
Also have you done anything in the area of making all he power you have now get to the ground......Such as sub frame connectors or spring changes.....?

[djvaly]

yep, i got the SFC's in .. and the eibach pro kit :yup:

[schrysler]

would going from 273 to 373 be a pretty drastic difference?

[djvaly]

a nice change in acceleration I hear, you'd need to tune your car for the new gear, I recommend buying a handheld programmer like Hypertech Prog 3 or such. you get ok tuning out of that, shift points moving etc, plus the gear ratio part. your speedo needs that recalibraton tuning.

PS. I also hear it's worth doing a mild torque converter/stall for the A4.. if u have it as a daily driver, if it's a track car only, then shoot go for 4.10 gear and a more aggressive stall convertor.

[hamburger68]

To offer a totally different approach:
I'm gonna stick to my 2.73 gears (in fact i just had them replaced), 'cause i wanna see how fast this baby goes on the autobahn!
I guess 170 - 180 mph isn't out of reach... Anyone of you tried that in an f-body yet? (And survived?)

[LS2Tuner]

would going from 273 to 373 be a pretty drastic difference?

Yes MAJOR change.

[sped]

Where can you buy 3:73 gears from? I've been having a little trouble finding them. Also, you can't use a programmer on my 93 LT1, so what the heck would I do if I got new gears? Would I have to do anything?

[djvaly]

To offer a totally different approach:
I'm gonna stick to my 2.73 gears (in fact i just had them replaced), 'cause i wanna see how fast this baby goes on the autobahn!
I guess 170 - 180 mph isn't out of reach... Anyone of you tried that in an f-body yet? (And survived?)

you ain't getting 180mph, from LS1 that easily, I'd say 170 top more realisically. :zoom:

[DeadZ28]

If I have this idea right, a torque converter (stall converter) provides additional torque multiplication equivalent to a higher numerical gear ratio..
so if I were to do 3.73 gears why would I need to do 3000-3200 stall converter? would I do one or the other? please explain.. Thanks!

Let me make this simple. Gears are great and all in torque amplification but your car makes more power at certain RPM ranges. HP is greater at higher RPM's what the converter is going to do is lockup at that certain stall speed that it was made for and transfer that power at higher RPM's to the wheels.

Heres a analogy that I really like when you go outside jogging you start to breathe in and out faster and harder. Well the same thing goes for a performance engine. The engine is breathing in and out harder and faster, at a higher rpm. If a high performance engine makes power at a higher rpm, then a higher stall speed torque converter is what you need to put more power to the ground quicker.

Personally I liked my 4.10's in conjunction with my PI 3000 stall. Couldnt catch traction worth a d*** but enjoyed it.

[djvaly]

Let me make this simple. Gears are great and all in torque amplification but your car makes more power at certain RPM ranges. HP is greater at higher RPM's what the converter is going to do is lockup at that certain stall speed that it was made for and transfer that power at higher RPM's to the wheels.

Heres a analogy that I really like when you go outside jogging you start to breathe in and out faster and harder. Well the same thing goes for a performance engine. The engine is breathing in and out harder and faster, at a higher rpm. If a high performance engine makes power at a higher rpm, then a higher stall speed torque converter is what you need to put more power to the ground quicker.

Personally I liked my 4.10's in conjunction with my PI 3000 stall. Couldnt catch traction worth a d*** but enjoyed it.

ok, that made sense. thanks!

[DeadZ28]

ok, that made sense. thanks!

When I was learning about this stuff that was the only way I could describe it. Now I can go into depth on these things. Man I need another Camaro. I'm selling my converter if your interested. Do you already have gears or not yet?

[djvaly]

When I was learning about this stuff that was the only way I could describe it. Now I can go into depth on these things. Man I need another Camaro. I'm selling my converter if your interested. Do you already have gears or not yet?

I've got 3:73 going in there and 3000 stall as well. expecting my car out of the shop next week, I got new ls2 402 stroker motor, AFR225 heads, G5X3 cam, built up A4 tranny, dumped 12k on it... ;)

[DeadZ28]

I've got 3:73 going in there and 3000 stall as well. expecting my car out of the shop next week, I got new ls2 402 stroker motor, AFR225 heads, G5X3 cam, built up A4 tranny, dumped 12k on it... ;)


3.73 should be a good gear ratio for a stroker. Should be nice and balanced goodluck with it. 12k whew :attn:

[djvaly]

3.73 should be a good gear ratio for a stroker. Should be nice and balanced goodluck with it. 12k whew :attn:

:zoom: :texas:

[stunna-shades]

ls2 is a bad boy...and fully built....are you going to throw some funny gas at it.....your setup is what i dream of.....but at 12k is alot of money

[djvaly]

ls2 is a bad boy...and fully built....are you going to throw some funny gas at it.....your setup is what i dream of.....but at 12k is alot of money

well 12k plus 5k spent on pulley, full exhaust, lid+filter, new springs, shocks and subframe connectors. but yeah the ls2 402 is forged, so full bolts on with it = 500rwhp.
with that said I can throw a s/c on it or better yet a twin turbo to go 800rwhp. but I need a 12 bolt first ;)... ok this is off topic :texas: :wall:

[stunna-shades]

i voted for 373's but if you are a six speed and have a 12 bolt or 9 in id say 410's all the way

[import slayer]

I have an A4 as well and I used to have 3.73's but when I upgraded to a 9 inch I got 4.11 gears and I love them way more than the 3.73. On the highway it is not that much diffrent than 3.73 as far as rpms goes either.

[stunna-shades]

a giant cam will love love love.(3 loves) 410's also....they go together like peas and carrots..

[guitarjay76]

Im Sayin You Should Hit Over 170 With The .273s. I've Had Mine Pegged With The Same Gears, K&n, Velocity Stack, Maf&housing, Hypertech 3 And Flowmaster 3" Cat-back Several Times On The Street-- With More To Offer. P.s (shhhhh- I Hear The Boys In Blue Have No Sense Of Humor!!!!)

[98 formula ws6]

When I was learning about this stuff that was the only way I could describe it. Now I can go into depth on these things. Man I need another Camaro. I'm selling my converter if your interested. Do you already have gears or not yet?

Hey do you still have converter?:drivin:

[30th290]

if you put a 4.10 in a a4 wouldent you have to use od in the quarter

[98 formula ws6]

I just put 4.10's in haven't got to run in quarter ran in 1/8 with 2.73 left in 3 shifted 1 time allmost at the end of the track

[Wesman]

I just put 4.10's in haven't got to run in quarter ran in 1/8 with 2.73 left in 3 shifted 1 time allmost at the end of the track

So basically you wen through the traps in 2nd gear then?? Sounds about right for a 2.73 auto.

4.10's should help a lot :devil:

[Ridinfilthy]

i would like to know if i put 4.10 in my f-body with 26 in tire and 3400 converter will i hit od or be in fourth at 6k any info would be appreciated!!!

[Hawk241]

Hey, A4 guys, what are you guys running rpm wise at 60 mph with 3.73's? I have 3.23's now and a set of 3.42's in a box, I know that if I install those, I am at 2,000 rpm at 60.

[djvaly]

Hey, A4 guys, what are you guys running rpm wise at 60 mph with 3.73's? I have 3.23's now and a set of 3.42's in a box, I know that if I install those, I am at 2,000 rpm at 60.

3:73, A4 built stage 4, 3000 stall running 2600-2700 rpm at 60. I'll double check but I am pretty sure that's where it is, also LS1Edit tuned so shift points are moved a bit.

[Hawk241]

Woa, thats a jump from where I am at, almost another 1,000 rpms than 3.23's. I know its all about performance etc., but I plan to do a trip or two, like the camaro firebird challange etc., in New Hampshire, I dont want to fill up every two hundred miles..how much top end did you lose?

[djvaly]

3:73, A4 built stage 4, 3000 stall running 2600-2700 rpm at 60. I'll double check but I am pretty sure that's where it is, also LS1Edit tuned so shift points are moved a bit.

I checked on this and it is actually 2300 at 60 mi/hr, in some setup less. I got a 402 ls2... on an ls1 I think it would be 2200-2150 at 60mi/hr with 3:73 gears.

[Hawk241]

I checked on this and it is actually 2300 at 60 mi/hr, in some setup less. I got a 402 ls2... on an ls1 I think it would be 2200-2150 at 60mi/hr with 3:73 gears.

Thanx for the info..., that Ls2 that much diferent than the LS1? Should be but I think r LS1's are underated a tad..., GM high tech dynoed one (LS1) a couple of months ago for a baseline, They were about to do a H/C mod I believe, they got 400 horse at the crank!

[Y2KPewterSS]

Closing thread since poll is so old.