urbanhunter44

iTrader: (1)

I'm going with 4.10s on my otherwise stockish (see sig) LT1 car. I'm expecting a slight drop in MPG. What do you expect this will give me in the quarter, based on my current best (sig)?

Also I plan on running sticky tires soon (praying to the ten bolt gods on this one) once I pick up my Nitto 555Rs. What do you think I could get in the 1/4 with the DRs and the 4.10s?

I'm also planning on tuning this beast very shortly, getting a base tune from pcmforless and playing with it a tad.

Black_00_WS6

i read in a magizine once, dono if this is true or not maybe someone else can help you but, it was do's and dont's of LS1's i know you have the LT1 but gears is still the same, it said on M6's go with 4.10's with A4's go with 3.73's but about the mpg mine didnt drop awhole lot i have 4.10's but a M6

Siphon

iTrader: (7)

I know someone who had a catless exhaust and a K&N intake. . .with 4.10s. It was an A4. He only ran a best of 13.6 on street tires. Don't remember if he had heads at the time. . if he did, they were cheap.

94greencamaro

iTrader: (8)

Expect to see a .3-.4 gain if you had 2.73
Expect to see a .2 if you had 3.23

BoltOnZ

Not really about the gear, but being a stockish car with an auto, I wouldn't worry about the 10 bolt on sticky tires, especially Nitto 555Rs. I have M/T DRs on my auto and I'm doing fine, cut a 1.98 60' with em with stock tc/2.73 gears.

96capricemgr

iTrader: (1)

Launching will be the hard part, beyond that I think you will like them. That said once you do the math with the b-bodies going from 2.93/3.08 to 4.10s your highway RMPs end up being about what they would have been in D befre the swap. So on the highway it is just like losing OD. If you have 2.73s it will be a little worse for you and if 3.23s slight better. Just wanted to offer a way for you to gauge what the car will be like a cruise speed after the swap.

Jameslt1TA

I did the same thing when my car had a catback, cai, hpp3 and 4.10s. The complete lose of traction didnt really do me to much good. 4.10s will however make a big cam alot better for driving around on the street.

Speed Density

iTrader: (38)

i have em in my 93 a4, but the car already had great gears 3.23, so the gain wasnt as good as if i would have had lower gears like 2.73. Just beacuse i am starting higher. I love my gears, gas isnt bad i really dont see a loss.

urbanhunter44

iTrader: (1)

Okay, thanks guys for the comments!

brandboZ28

iTrader: (2)

I gained .2 in the 1/4 mile going from 3.23's to 4.10's. Shouldnt worry too much about the 10-bolt with the auto. Ive cut 50+ 1.6 60' times on mine with no problems at all with my best being a 1.63. Makes street tires useless though...

tekprodave

I would also like to emphasize that traction WILL be a problem.

urbanhunter44

iTrader: (1)

That's why I'm getting 555Rs and some suspension mods pronto.

satinleafct

iTrader: (1)

I have an M6 and am planning on getting some 4.10's. I'm throwing my 275's back on so I don't break the rear. How do M6's react to some gearing? I'm hoping for a big difference!

quick93transam

i've got the M6 with 4:10s and a buddy of mine had the A4 with 4:10s and he said that he noticed the same or better MPG around town. he contributed it to the fact that the trans shifted quicker and got into OD quicker than it did before. i don't know what his factory gears were but i think it was 3:23 because he had the 150MPH speedo. but i am just going by what i know on the M6s with the 150MPH speedo. if i ever get the chance to get a 12bolt or 9" i will probably got up to 4:56 gears since she is not my daily driver any more.

blind527

iTrader: (8)

I thought all of ou cars had the 150 MPH speedo. It's not the speedo that determines the gears, it's either having over drive or just drive. If you have OD, D, 2, 1....you have 3.23.

gixxer75094lt1

iTrader: (8)

no my brother has a 94 transam v8 with the 115 reading speedo and he has 2.73 gears and on top of that he has a govenor on it!!! sucks *** for him...lol...but anyway i have an A4 in my camaro which had the stock 3.23 in it. so i replaced them with 3.73 and i must say that i would have went for the 4.10's. its a difference allright from 3.23 to 3.73 but since i barely do any highway driving 4.10's in a A4 would be awesome if your driving around town, your local streets, cruising, etc......

quick93transam

i didn't think that they offered anything other than a 4 speed auto. i never heard of a 3 speed auto unless it was converted to 350 or 400. i have heard of a 115 speedo in the V8 cars as well as the V6 cars though. granted the MPH on the speedo may or may not have anything to do with the gears or vise versa. not to go totally of topic though i would definatly go with the 4:10s on an A4 car. get a good convertor and she will **** and git.

lt1fbody355

I had 4:10's a couple of times then I got smart and bought a 12 bolt! .............I wouldn't waste my time again putting gears in a 10 bolt.

brandboZ28

iTrader: (2)

What blind527 was referring to is if the shift plate has selectors for OD, D, 2, 1 as found on the 3.23 cars as apposed to the OD, D, 2 as found on the 2.73 cars. If you have a 1st gear selector, you have 3.23's or somewhere down the road, the shift plate has been changed. All A4 LT1 fbodies got either the 4L60(700R4) in 93 or the 4L60E in 94-97 which are both 4 speeds. Youre right on there!

BlackScreaminMachine

iTrader: (17)

Thats well and good, but when you start cutting 1.6 60 foots and getting that DEAD hook, that 10 bolt will go down. I assure you it will.

As long as you dont go to a big cam/nitrous/blower/turbo and pushing high mph you wont be smacking the limiter in 3rd gear which is where you want to be, the peak power in 3rd gear.