redline in 2nd gear?

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redline in 2nd gear?

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redline in 2nd gear? - 2/16/2006 3:50:52 PM

strongboy2005

Posts: 170
Joined: 1/28/2006
Status: offline

My calculations figured my redline to be at approximately 78 MPH in 2nd gear...

Does this sound about right?

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2003 LS (4-door) Chevy Blazer 4.3L 2WD GU6 G80
http://www.cardomain.com/ride/2257682

Post #: 1

RE: redline in 2nd gear? - 2/16/2006 4:54:25 PM

swartlkk

Posts: 15304
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

You could use any one of a number of calculators online. Here's just the first one that I have found:
http://davewin.com/tech/gear_ratios.shtml
You have a final drive of 3.42 (GU6) and the GM 4L60E has ratios as follows 1st=3.06:1, 2nd=1.75:1, 3rd=1.00:1, and 4th=0.70:1. You can use an online tire size calculator to get your tire height, but a 235/70R15 is ~28" and a 235/75R15 is ~29". Plug those into the calculator with your redline and you're set.

Here's another calculator that gives you just about everything on one page:
http://www.speedworldmotorplex.com/calc.htm

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Kyle-