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#1 |
Registered User
Join Date: Jun 2010
Location: Manitoba
Posts: 223
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speedo calibration ????
Hello, I recently swapped in a 700 r4 into my 77 stepper. When I hook up the speedo at gps speed of 60mph it is bouncing off the peg....
what kinda gears do I need to put into it, do I need one of those ratio reducer boxes? I am runnng 3:73 ratio with a 26.6 tall tire 2wd? |
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#2 |
Registered User
Join Date: Nov 2011
Location: Oklahoma City Oklahoma
Posts: 1,056
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Re: speedo calibration ????
Gps?
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#3 |
Registered User
Join Date: Nov 2011
Location: Oklahoma City Oklahoma
Posts: 1,056
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Re: speedo calibration ????
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#4 |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 5,020
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Re: speedo calibration ????
Look at the table here.
http://www.transmissioncenter.net/sp...__va.htm#700r4 The best options still have @ 1% error. 3.73:1 26.6" DIA tires 15T drive with 42T driven = 0.9% error 3.73:1 26.6" DIA tires 15T drive with 43T driven = 1.5% error 3.73:1 26.6" DIA tires 17T drive with 35T driven & 37.5% slow down ratio box= 0.6% error 3.73:1 26.6" DIA tires 19T drive with 36T driven & 50% slow down ratio box= 0.6% error
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. Last edited by hatzie; 06-24-2012 at 09:30 AM. |
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#5 | |
Plays with trucks
Join Date: Sep 2003
Location: Asheville, NC
Posts: 433
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Re: speedo calibration ????
Quote:
These guys are really good to deal with. Just got new gears from them, nobody else had them, they are getting harder to find.
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Gary My Dad's Old Truck 1985 ![]() |
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