Changing rear gears? Speedo or other problems?
Yea so the speedometer will be inaccurate after changing the diff ratio. The speedometer is based on output shaft RPM so if you increase the gear ratio from 3.27 to 3.76 your output shaft will be spinning more for a given speed than before and thus your speedometer will read higher (proportionally to 3.76 divided by 3.27) by approximately 15%.
Last edited by BartleDoo; May 26, 2011 at 11:25 PM.
This post is from 2001.
mtnrat, there is no 3.26 diff. The correct label is 3.266 or rounded up 3.27. You require a speedo calibration device such as a yellow box. But I would advise putting back the stock 3.92 diff. Besides the obvious performance advantage (3.26 is far to tall with the w58's 2nd and 3rd gear ratio) you'll be left with about a 4% error before factoring in tires.
mtnrat, there is no 3.26 diff. The correct label is 3.266 or rounded up 3.27. You require a speedo calibration device such as a yellow box. But I would advise putting back the stock 3.92 diff. Besides the obvious performance advantage (3.26 is far to tall with the w58's 2nd and 3rd gear ratio) you'll be left with about a 4% error before factoring in tires.
Trending Topics
Pole Position
Joined: Jul 2006
Posts: 252
Likes: 0
From: Florida
This post is from 2001.
mtnrat, there is no 3.26 diff. The correct label is 3.266 or rounded up 3.27. You require a speedo calibration device such as a yellow box. But I would advise putting back the stock 3.92 diff. Besides the obvious performance advantage (3.26 is far to tall with the w58's 2nd and 3rd gear ratio) you'll be left with about a 4% error before factoring in tires.
mtnrat, there is no 3.26 diff. The correct label is 3.266 or rounded up 3.27. You require a speedo calibration device such as a yellow box. But I would advise putting back the stock 3.92 diff. Besides the obvious performance advantage (3.26 is far to tall with the w58's 2nd and 3rd gear ratio) you'll be left with about a 4% error before factoring in tires.
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Top 10 Most Confusing Things Lexus Has Ever Done!
Joe Kucinski
2026 Lexus ES Review: Lexus Re-Embraces Founding Principles
Michael S. Palmer
10 Lexus Bargains That are Cheaper Than a New Toyota RAV4
Joe Kucinski
8 Weirdest Things Lexus Has Ever Built
Verdad Gallardo
10 Lexus Designs That Have Aged Like Fine Wine
Verdad Gallardo
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
It lists the W58 conversion in his sig. But hot damn this is two threads from 2001 that you just bumped CleanShots! WTHeck bro? lol Must have been drinking a little and digging through the archives or something.
I have been driving the W58 and 3.27 for a while now, close to 3000 miles. It is quicker than the auto ever was and is better for passing. I like the longer gears as I do most of my driving on the hwy. It is what I want for how I drive. If i was ripping around a city I would like the shorter diff, but it is great for what I want. I will look into the yellow box. I put a speed calibrator in my 80 series landcruiser when I put in 4.88 gears and 35" tires. Worked great for that, but I had explicit instructions on which wires to use to make it work for that model.
Thread
Thread Starter
Forum
Replies
Last Post
SorrGwa
GS - 2nd Gen (1998-2005)
9
Nov 28, 2011 08:15 PM
Boergy
SC - 1st Gen (1992-2000)
15
Dec 17, 2010 10:37 AM
box, changing, correction, error, gears, is300, lexus, r154, rear, recalibrator, sc, speedo, speedometer, swap, yellow
