Alan2smiley
I'm in the shop
The neighbor kid bought a 98 1500 with LT285 75R16s and the speedometer is off, he's wondering how to calibrated. I found some info about a 92 but no luck on the newer model. Any help would be much appreciated.
CK5
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How to calibrate Speedo
- Thread starter Alan2smiley
- Start date
Computer can be reprogrammed/tuned or there are in line programmers specifically for tire size.
Alan2smiley
I'm in the shop
Yeah I looked on u-tube and found some of that information. Thanks
HUD app on the phone.
Why even mess with it? App for phones with give MPH...
Alan2smiley
I'm in the shop
Probably wants the odometer to be correct. OCD, it's best when everything works correctly. He just figured out he has bigger fish to fry, 4.3, bigger tires and factory gears doesn't move a full size very well.
Alan2smiley
I'm in the shop
Actually the kids Dad picked out the truck, kid gets his license end of this month.
Fair enough...
I can not find the in line one I used on my moms 34 chevy. 4.3, TBI, 700r4, ford 9". Got it dead on with GPS.
Alan2smiley
I'm in the shop
Was it programmable?
It was "adjustable". Small screw driver turned a pod to adjust VSS to the speedo. It was a classic industries product. Drove the car at a steady speed per GPS and adjusted the speedo to match. Simple.
Alan2smiley
I'm in the shop
I'm 20 years behind on this stuff, never needed it. My 03 diesel and work sedan always run, the wife car is usually under hundred thousand miles. I'm in the process of parting out a 98 vortex 350 2500, lots of wires.
Alan2smiley
I'm in the shop
Our son just got a blue driver OBD scanner, cheap and simple.
I have an Autel scanner at work that I used to change my 03 suburban. It's spot on now.
Alan2smiley
I'm in the shop
He said it harder to do between 92 and 01. I told him to bring it over I'd part it out.
Just FYI on 89-91. Figured someone can use it.
OBD 1 came with a series of resistors in the instrument panel.
The factory would blow out certain ones depending on gear ratio and tire size.
My. 89 wold read 95 at 60 when I regeared it from 3.42 to 4.10.
A buddy of mine was afraid to follow us on our bikes in it, said he wasn't going 120 anywhere!
Full how to.
chevytalk.org
OBD 1 came with a series of resistors in the instrument panel.
The factory would blow out certain ones depending on gear ratio and tire size.
My. 89 wold read 95 at 60 when I regeared it from 3.42 to 4.10.
A buddy of mine was afraid to follow us on our bikes in it, said he wasn't going 120 anywhere!
Full how to.
Recalibrating 1988-1991 speedometer / dash cluster - Chevy Message Forum - Restoration and Repair Help
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nice looking truck btw...
Alan2smiley
I'm in the shop
Thanks for the heads up
And you can buy GPS speedo's also.
3-3/8" GPS Speedometer 120mph
3-3/8" GPS Speedometer 120mphwith Lifetime Warranty | Custom Build Your Gauge
www.speedhut.com
Amazon.com: ELING Universal MPH GPS Speedometer Odometer 160MPH for Car Motorcycle Tractor Truck with Backlight 85mm 12V/24V : Automotive
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Alan2smiley
I'm in the shop
I haven't heard anything from him, thinking he figured it out.
