3.90 gears
Thread Starter
Teching In
Joined: Oct 2006
Posts: 45
Likes: 0
From: Maryland
3.90 gears I have an A4 TA with a 228r cam, 3400 stall, and full exhaust. I think im going to get 3.90 gears from Motive since its between 3.73 and 4.10. For those of you who have 3.90s in an A4, how do you like them? Also, what are the rpms at going highway speeds of 65-70mph?
3.90's would be a great choice. I went with the 3.73's and I am very happy with them. At 70, I am at 2600 rpm. 81 mph I am at 3k rpm. So with the 3.90's you should be right around that area. I picked the Motive 2 series, and over 10k miles on them now, no problems. Also picked up half a second from 2.73's 
The 3.90's would be as much as you'd want to go with the stall. If you drive a lot, and you're not looking for every hp, I'd go with the 3.73's. Like I said, I'm very pleased with my 3.73's and I drive quite a bit, but I have a stock stall still. My gas mileage has been unchanged from the gear swap also.
I'd say if you don't drive a lot, the 3.90's would be great. Since you have a cam also, you have more room in 3rd than I do.
I'd say if you don't drive a lot, the 3.90's would be great. Since you have a cam also, you have more room in 3rd than I do.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
i got the 3.90s but i dont drive it eveyday and they are a great gear if u dont run on the highway over 70mph. i have 3400 also and it works out very nicely.. and i have drove my car everyday for a couple weeks and it wasnt to bad..
