speedo recalibration
01-30-2006, 02:34 AM
#1
Thread Starter
Join Date: Mar 2004
Location:
Posts: 32
speedo recalibration
I just got some different gears in my mustang, 3.08's to 3.73's. i also purchased some new rims and tires and i need to get my speedometer recalibrated. should i go to a shop for this? what kind of shop does this and how much do you think it costs? thanks for all your help
01-30-2006, 02:39 AM
#2
2nd Gear Member
Join Date: Dec 2005
Location:
Posts: 285
RE: speedo recalibration
For the new gears..you need to get a new speedo gear...(off ebay or somethin...pretty cheap $10-$15) But I dunno bout the different sized wheels.... someone will pop in here eventually though.
01-30-2006, 08:16 AM
#3
6th Gear Member
Join Date: Oct 2005
Location: st clair shores MI
Posts: 6,028
RE: speedo recalibration
you just need to use a calculator for the tire size.
if you have a '95 trans it has a 8t drive gear and you can't correct it w/out changing the drive gear.
if you went w/ a 6t drive gear (it's the one clipped on the output shaft) the 18t driven gear (same one you have now) will work w/ that one.
otherwise you need a 7t drive / 21t driven
or w/ a 8t you have now, you could go w/ a 23t driven but it will still be off about 8% or so. (it will be corrected for 3.55's)
all of this depends if the tire height you have is about 25 1/2" tall.
width / ratio does not matter, nor does rim size.
if you have a '95 trans it has a 8t drive gear and you can't correct it w/out changing the drive gear.
if you went w/ a 6t drive gear (it's the one clipped on the output shaft) the 18t driven gear (same one you have now) will work w/ that one.
otherwise you need a 7t drive / 21t driven
or w/ a 8t you have now, you could go w/ a 23t driven but it will still be off about 8% or so. (it will be corrected for 3.55's)
all of this depends if the tire height you have is about 25 1/2" tall.
width / ratio does not matter, nor does rim size.
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