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07-02-2011, 07:57 AM
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#1 |
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Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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rear gear swap and speedometer
I just swapped my center section in my HO-52 from 4.57s to 4.10s....I was wondering how much this would throw my speedometer off?
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07-02-2011, 08:05 AM
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#2 |
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Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: rear gear swap and speedometer
Easiest way is to check it with GPS.
Smitty
__________________
71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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07-02-2011, 08:13 AM
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#3 |
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Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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Re: rear gear swap and speedometer
Well i dont have one.
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07-02-2011, 09:05 AM
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#4 |
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Registered User
 
Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: rear gear swap and speedometer
That would be a change of 10%.
__________________
Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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07-02-2011, 11:26 AM
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#5 | |
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just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: rear gear swap and speedometer
Like turp said, it's going to be a percentage, not a constant number. You can swap the driven gear in the transmission to get it back right again.
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. 
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07-02-2011, 12:06 PM
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#6 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: rear gear swap and speedometer
from the looks of your tires the speedo wasnt correct b4 the gear change
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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07-02-2011, 07:42 PM
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#7 |
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Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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Re: rear gear swap and speedometer
Yes because with the 4.57s that I had in it, when I would go 55mph my truck would be screamin....now with the 4.10s, it is still screamin at 55mph, like nothings changed....so the best bet is to use a gps?
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