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Re: rear gear change
[Re: poison_ivy]
#1728273
01/13/15 04:05 PM
01/13/15 04:05 PM
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Joined: Jan 2003
Posts: 25,729 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,729
Rio Linda, CA
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Starting in '98 speedo drive gears were no longer used, the ABS sensor on the rear end gives a speed signal so a computer flash with a factory DRB or electronic adapter (tuner) is the only way to change the calibration.
The INTERNET, the MISinformation superhighway
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Re: rear gear change
[Re: John_Kunkel]
#1728274
01/13/15 05:44 PM
01/13/15 05:44 PM
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Joined: Aug 2010
Posts: 632 Casco, MI
Savoy1964
mopar
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mopar
Joined: Aug 2010
Posts: 632
Casco, MI
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I believe you won't have to change anything when changing the gears. I went from 4.11 to 3.73 on my 03 and made no change to computer. Speedo is spot on.
2003 Dodge 3500 Diesel
1964 Plymouth Savoy White 2dr sdn. 512 stroked, Dominator, New Best 9.75 @ 138.50mph 2019 Challenger Scat Pack 1320 White Knuckle-K&N Cold air filter, Billit Oil catch can, drag radials stock 11.911 @ 114mph
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Re: rear gear change
[Re: dogdays]
#1728276
01/14/15 04:20 AM
01/14/15 04:20 AM
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Joined: Oct 2011
Posts: 516 ND
dodgedon
mopar
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mopar
Joined: Oct 2011
Posts: 516
ND
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like what was said above... The speed is a factor of tire size and axle RPM's from the ABS in the rear axle. So I don't believe changing the rear ratio would change the speedo. The speed sensor ring Diameter is the same, no matter which ring gear is used. Changing the tire size would. Not sure how GM does it but, a 93 suburban is not a 02 03 Dodge.
67 Charger 383 auto 75 Dodge CNT 800 CAT Diesel 2012 Ram Crew cab 5.7 4x4
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