ROWDYZ28

So a friend of mine just bought a 95 Lt1 and it has the stock 3.23's. Tried to find a thread on feed back about changing to 3.42 or 3.73 but came up short. He's got a stock A4 4l60e, drives a lot of hwy miles. Do you think 3.73 will be too much for the hwy. Be nice to find a site with a chart on both.

Anything helps..thanks

infinitebird

iTrader: (11)

I have 4.10s on my auto right now and it is way too much for the highway. I'm gonna swap it out to 3.42, I think that is the best auto gear if you have to drive a lot of highway miles.

ROWDYZ28

I heard that 4.10 on a A4 was real bad..I just wonder if there is much of a difference between the 3.42 and 3.73 rpm wise.

infinitebird

iTrader: (11)

with the 4.10 gears right now im around 2750 at 70mph, i calculated that with 3.73s it would be around 2500 and with 3.42s it would be around 2300.

ROWDYZ28

cool..thanks man

StealthFormula

iTrader: (35)

I would just stay with 3.23's if I were him, I wouldnt be able to justify the cost of installation and gears plus new bearings etc. etc. just to go from a 3.23 to a 3.42 and for there to be a minimal performance gain. I would say go 3.73 without doubt but because of the highway driving I would just recommend your friend stays stock and puts the money elsewhere maybe into a converter which would be a much greater performance gain then upgrading to 3.42's and would not effect highway rpm's.

M6 Swap

iTrader: (1)

what do you think about going from 2.73s to 3.23s.?

StealthFormula

iTrader: (35)

Is your car A4 or M6 curious because of your username and what kind of driving do you do? 2.73's are amazing on the highway but so are 3.23's. I use to drive the turnpike everyday with my old LT1 that had 3.23's and I got good mpg and was very happy. There is definetly a noticible performance gain going from 2.73's to 3.23's but still some left out on the table.

M6 Swap

iTrader: (1)

its an A4, for now. i do almost all hwy driving.

porksoda

iTrader: (39)

If your doing an M6 swap then for sure throw in the stock 3.42's for a lot of highway driving.

1998_trans_am_ls1

iTrader: (5)

i have a 98 trans am a4 with 3.73s and i like the 3.73s i get about 2100 at 50mph

M6 Swap

iTrader: (1)

well the names a little misleading, originally i was gonna do the swap but i kinda gave up on it. its stayn auto, 3.42s?

BOLO

iTrader: (40)

3.73's/2800 stall is a good all around combo for both highway/street use. This is what I ran back when my car was my only daily commute.

Razor_Blade

iTrader: (8)

Here's a pretty cool gear calculator to play with. http://www.f-body.org/gears/ I may be showing my age, but I was playing with cars long before A-4 transmissions were available. A 4.10 gear with a 60E is not bad at all to me since I've taken road trips in cars that ran 3500 at 60 mph.

balzyz28

Nice find^^

infinitebird

iTrader: (11)

2.73s are garbage. that **** should never have been put in a performance car. upgrade to at least 3.42.

NorthernZ

M6 with stockers(3.42)
My question is what kind of gains do you get out of gears? I know there good but what kind of good? I don't realy care about fuel but I don't want to run constent high rpms on the highway. I have access to 3.73's but sould I get 4.10?

infinitebird

iTrader: (11)

for an M6 definitely 4.10s.

xxcoolrollinxx

2.73's FTL

355z28

iTrader: (8)

I run 4.10's in a A4 definetly dont recomend for a hwy car. I eventually might drop to 3.73 gears. I really like the 4.10's around town and at the track, its ok taking the back roads to town, but nearly impossible to take on the interstate. if he gets a different daily driver and is going to keep the car for a weekend toy to go raise hell in id definely go with 4.10s.