I am undecided about going with 3.73 or 4.10's. I have heard that 3.73 are perfect for an A4 however 4.10's are really fun. I was wondering what the rpms were at 60mph with 4.10's and what they were with 3.73's. Also I have have heard that with the 4.10's you have to shift into OD in a quarter mile.
True?

 

see the sticky. it has the numbers you seek.

 

for some reason my comp wont let my open the file.....

 

410 in an auto is pretty wicked i think- -i have m6 373 and wish i had 410 though---i do not think you would get much traction,and tires would be an issue--hope someone else chimes in to help.

 

You will run out of gear in the 1/4.

 

i run 4.10s...and love them in my auto.
60 = 2300rpms
80 = 3000rpms

i trap at 111-112 and with the stock rev limiter it has to go into OD about 40-50 ft before the finish.

 

With a 28" tire a 4.10 might be good in the 1/4?

 

Are you sure about 3000 rpms @ 80 mph with 4.10s on A4? 3.73s do 3000 rpm at 80 mph on a A4.

 

4.10 gears
80 mph = about 3100 rpms
90 mph = about 3500 rpms
100 mph = about 3800 rpms
all were 4th gear converter locked.

 

4.10s here also and lovin them!!!! i hit 4th gear just as i cross the line w/6600 shift points and stock size tires.COME TO THE DARK SIDE,DO IT!!!

 

yes im sure. maybe your converter isn't locking up...i don't know what else to say...lol

 

thanks for the help

 

80 @ 3k rpms??? Um, I'm at 3k @ 75mph. Sounds like you have 3.73s or something else.

BTW, 4.10s in A4 is crazy!! You will have absolutly no traction in 1st on the street, good luck at the track with your rearend if you have sticky tires. But I will tell you this..if you have decent stall(I have a small one) you'll give them pesky m6s a run for there money. But thats if your 4l60e lasts....

Have fun!!

Ski