3.73 swap in a 6 speed

Reply Subscribe

Thread Tools

Search this Thread

Mar 12, 2008 | 08:34 PM

95N20FORMULA

Thread Starter

TECH Regular

iTrader: (3)

Joined: Dec 2006

Posts: 405

Likes: 0

3.73 swap in a 6 speed

i just switched to 3.73s in my m6 formula from 4.10s, what does my 1st-4th gears go to if i shift at 6k, no calculators i want actual human results thanks

Mar 12, 2008 | 09:02 PM

Formula350

TECH Senior Member

iTrader: (3)

Joined: Oct 2006

Posts: 7,564

Likes: 4

From: Decatur, TN (N-W of Athens)

Human results will be the same as calcs... You need to factor in tire size, trans' gear ratios, etc. I mean, what are you expecting? The calculator to be wrong? Well, there is always your speedo-gauge not reading correctly. Everyone says the Tach is off (mine oddly is right on). That's per-person though, won't be static across multiple people.

When I switched to 3.42s I did a calc and showed, that since my speedo is off a few MPH, that it'll now be right on now. I have yet to test that, but being such a small change I'm confident it'll be right on now.

Mar 12, 2008 | 09:02 PM

infinitebird

TECH Veteran

iTrader: (11)

Joined: Jul 2004

Posts: 4,280

Likes: 51

From: Denver, CO

If you have your speedo calculated properly I've found that the calculators are pretty close. I typically saw 1-3 mph less than the calculator indicated.