I have a very strong urge to put a set of 4.10's in my A4. I think it should be ok, because with the exception of first gear, all of the gears are evenly spaced including overdrive. According to my calculations this should give me a top speed around 170 at 6200rpm. Cruising at 70 should be around 2528rpm which is fine with me. WWC says that the 3.90's will improve my 1/4 mile time by 1 full second coming from 2.73's so the 4.10's should be even better. I am not sure if I should do a torque converter because traction problems and i will be running street tires, but i definitely want to get the transgo shift kit. What do you think of this idea? What are your sugestions? Do you think this will work?

 

If I could afford gears, I would put 4.10s in my M6 without hesitation.

 

Your calculations look good to me:

[u]RPM 1 2 3 4/[u]
500 3 6 10 14
600 4 7 12 17
700 4 8 14 19
800 5 10 15 22
900 6 11 17 25
1000 6 12 19 28
1100 7 13 21 30
1200 8 14 23 33
1300 8 16 25 36
1400 9 17 27 39
1500 9 18 29 41
1600 10 19 31 44
1700 11 20 33 47
1800 11 21 35 50
1900 12 23 37 53
2000 13 24 39 55
2100 13 25 41 58
2200 14 26 43 61
2300 15 27 44 64
2400 15 29 46 66
2500 16 30 48 69
2600 16 31 50 72
2700 17 32 52 75
2800 18 33 54 77
2900 18 35 56 80
3000 19 36 58 83
3100 20 37 60 86
3200 20 38 62 88
3300 21 39 64 91
3400 21 41 66 94
3500 22 42 68 97
3600 23 43 70 99
3700 23 44 72 102
3800 24 45 74 105
3900 25 47 75 108
4000 25 48 77 111
4100 26 49 79 113
4200 27 50 81 116
4300 27 51 83 119
4400 28 53 85 122
4500 28 54 87 124
4600 29 55 89 127
4700 30 56 91 130
4800 30 57 93 133
4900 31 59 95 135
5000 32 60 97 138
5100 32 61 99 141
5200 33 62 101 144
5300 34 63 103 146
5400 34 64 104 149
5500 35 66 106 152
5600 35 67 108 155
5700 36 68 110 158
5800 37 69 112 160
5900 37 70 114 163
6000 38 72 116 166
6100 39 73 118 169
6200 39 74 120 171

-Jeremy

 

if you do, make sure to keep everyone updated :D :cheers:

Mark :seeya

 

I always wondered why 4:10 gears weren't a factory option in the first place. I suppose it has something to do with EPA ratings.

 

Now, if you could only get your hands on them.

 

i will wait as long and do whatever it takes to get them. How fast is a stock A4 with 2.73 in the quater mile anyway? I have not had a chance to go to the track and test it out yet.

 

My 99 A4, 2.73 was running 13.8 in 100 degree weather completely stock. With just MTI ram air, thermostat and programmer, and 65 degree weather, i got it down to 13.07. (and with N20 100shot...12.007)...

Daren

 

If after reading: http://forums.corvetteforum.com/zerothread?id=194399

and you still want to dive into an overhauled unit. I would thing you would be better with 3.90 in an A4. Slicks would still be a big necessity in first gear.

Depends alot too on the engine, stock, all bore, stroker, etc...

 

With the torque these engines have, I really think anything past a 3:42 for the Automatic, and 3:73 for the MN6 would create massive traction problems, and would make first gear somewhat useless. This is just an opinion, but that's what you asked for.

 

Traction is a problem with any ratio my friend. I know a dude who put a set in his A4 SS and he has not lost from a light yet! He has a few mods with a stock converter and transgo it is absoulutly sickning how he pulls away from me. Let us know if you do bud!

 

Speaking from experience, my last car had 4.10's with m6 and a shorter tire and more horsepower and torque, albeit a heavier car.

I would buy 4.10's without hesitation as long as they prove to be as durable as the 3.73's and 3.42's

Eric

 

I should have the 4.10 gears the middle of Janurary. The price will be $1495.00 exchange. There will be alimited # avaiable at first. Give me a call to put in your order.

Paul
Corvettes of Houston
281-821-1222

 

with all seriousness what would happen if i put the 4.10's in with the stock converter? what mods does your friend have on his SS? Thanks for your help.

 

Once again I appreciate your numbers. :flag

 

Do it. It should be awesome. I think "traction problems" are kinda cool...burnouts are easier on the car. :D :D :)

 

410s will wake your car up. :yesnod:

 

I think i will really like the gears bc i was reading on another forum where the f-body guys were using them and getting good results in the 1/4 mile. So with the weight advantage that my car has over them i should have very strong acceleration even with a basically stock engine. Plus, 2528 rpm is not bad for 70 mph, and the 171 top speed does not hurt either. I might run a cam later to alow me to raise the rev limiter to 6800 for longer gears and a higher top speed.

 

3.73's are sweet on my car,but I miss the top end Banzai runs.

If I did'nt enjoy top end so much I think 4.10's would be sweet :D

:cheers:
Bob

 

Completly stock aside from the K&N filter.