QuickSilver98

Looking to put a new rear end gear in my car the 2.73 is just not doing it anymore need some help deciding between a 3.73 or a 4.10. I was wondering the diffrence in the rpms between the two on the highway and also the pro and cons of each setup I'm going to be keeping the stock ten bolt but with a strong rear end plate thanks for the help in advance.

Camaro_Zach

iTrader: (19)

i had 4.10's in my stock 10 bolt rear. i freakin loved em. seriously i dont care if its auto or stick, 4.10's are mad fun. and as far as diffrence in rpm go here... http://www.f-body.org/gears

ngozer

iTrader: (1)

another vote for 4.10's. i love mine!!

TaTommyWS6

Got my 4.10s installed last night! They seem like they are going to be a lot of fun, but I have to TRY to restrain myself during the damn "break-in" period!

Tommy

gator's 99TA

iTrader: (2)

if the car isnt a highway car, 4.10s all the way, if it is a highway car, do 3.73 or even 3.42 for more comfort.

onebadz

Since you have an A4 id go with 3.73s for the simple fact that they are stronger than 4.10s because of the pinion gear size. I have 3.73s in my A4 and I love em. Just be prepared to do some messin with your shift points to get it just right.

JLMoses

iTrader: (3)

I wouldnt recomend the 4.11's in the stock 10 bolt...they will break loads quicker. the teeth on the 4.11 gears are much smaller and will break a lot easier on in the 10 bolt cause the pinion gear and all is so much smaller in the 10 bolt. I have the 12 bolt with 4.11's and I love'm. theres my $.02. Laterz Justin

QuickSilver98

I'm thinking that the 3.73 is souding alot safer with a ten bolt. I know that most of you posting have 4.10's but has anyone hear anything good or bad about the 3.90's. I mean thats soounds like the best of both world right?

NA$TY-TA

iTrader: (21)

What do you wan to run on the freeway?? I have 3.73's an di had 2.73's before. Since you have 2.73's i take it your an A4 and no way in hell would you like 4.10's. Plus at the track you would run out of gear and shift into 4th. I spin 2700 rpm's at 70. With 410's you would be over 3K. I would say ditch the whole i dea of trying to beaf up a 10 bolt and just save the cash and buy a 12 bolt or 9". I bough the whole rebuild kit with gears and the TA cover. The last time i launched in Nitto's i broke 6 teeth off the ring gear. I have been thru 2 sets in the last couple of months and it was just a waste of money cause you will never get it to take the power if you plan on modding alot in the future. Save it.... but thats just my .02 cents.

MontereyLS1

iTrader: (4)

I have 4.10's in my 2000 A4 and i love em...great low end, plus i still only turn 26-2800 rpms running 70mph. only problem I've run into is the 4.10's combined with the 3600 stall blows off 275/40-18 F1's BAD! traction will be your new problem.

Blk98Bird

I love my 4.10s, it was like an entirely different car when they were done! I have an m6 though...

42NightZ28

Quick silver since you live in the area i'll give you a ride in mine i have a 3.70 gear in my 9in.

onebadz

If you do get 4.10s you better watch them lauches or that 10 bolt will
Good Luck man

LS1derfull

The gears are not the weak link in stock 10 bolt with 4.10 gears, its the spider gears or planetaries in diff.

SouthFL.02.SS

A4= 3.73
M6= 4.10

Ragtop 99

iTrader: (7)

3.73s are plenty unless you're main focus is ET and you need the extra .05 or you have a 7000 rpm cam in the car. 4.10s will be like loosing your OD on the highway.

3.42s are good compromise for street & strip. a lot more responsive, they tame a high stall converter's looseness, and still have decent highway RPMs. Easier to launch on the street with 3.42s than with higher gears too.