Rpms with 3.90s
08-12-2004, 06:18 PM
#1
11 Second Truck Club
Thread Starter
iTrader: (16)
Join Date: Aug 2004
Location: Md
Posts: 3,693
Likes: 0
Received 0 Likes
on
0 Posts
Rpms with 3.90s
I have an 03 sillverado 5.3 auto 2wd I want to have 3.90s installed also. How many Rpm will I be turnin at 75 mph my tires are p255 - 70 - 16. 
08-12-2004, 09:40 PM
#6
TECH Senior Member
iTrader: (9)
Join Date: Aug 2003
Location: Cleveland Mississippi
Posts: 6,204
Likes: 0
Received 0 Likes
on
0 Posts
I have heard the formula is Gear Ratio x mph x 336 / tire ratio = RPM
Originally Posted by 03silverado5.3
I have an 03 sillverado 5.3 auto 2wd I want to have 3.90s installed also. How many Rpm will I be turnin at 75 mph my tires are p255 - 70 - 16.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
BROKE-aSS-BLAZER
GM Parts Classifieds
7
10-13-2017 03:50 PM
