91GT

<FONT face="Times New Roman, Times, serif" size=3>I was wondering if anyone knows what RPM I would be turnig at 60 or 70 miles an hour with a T-5 and 4:11 gears?</FONT></P>

Mustang88LXKid

that would be high, im not sure of the actual numbers, but the higher the gear ratio the higher RPMs. So if you are going to have a street car 4:11, thats not really "streetable" in my terms because your gonna have to use alot of gas and keep it at a high RPM to drive it. So thats my opinion on it, you'll be guzzling gas with 4:10 gears too and trust me it will be harder to drive.</P>


Matt</P>

91GT

Well I was going to drop a T-56 6-speed in it, and hopefully that would drop the R's enough to drive on the highway. If not I 'll go with 3.73's

vfast

what is the gear ratoi on the 6th gear?...I'd say it would change....4:10 gear are a whole nother animal...because of the diff. pinion gears....they now make a 3:90 gear for the 8.8

horatio102

go to randy's ring and pinion - they've got a few calculators for figuring out engine speed with a given mph and gear ratio. If you had a 1:1 5th with 4.10's and 35" tires I could tell you you're going to be turning just over 2000rpm at 60.

vfast

5th is more like 0.68
with a stock tire 27in @ 60 it's like 2500rpm

horatio102

Yeah I know 5th is a fairly low overdrive. But I've got a 1:1 top gear in my truck and 4.10's in the axles.

91GT

The 6 speed has a 5th gear of 1:1 and the 6th gear is .76