1995 Chevy Caprice wagon, automatic. I suspected right away something was amiss when cruising the back roads it shows 60 mph, this morning I took a Garmin device with me and when the Nuvi said I was doing 65 mph, the speedo said 83. at 50 it said 62.
I built a Dodge truck once, big tires, swapped out the rear end, fixed it by removing the cover where the speedo cable goes to the tranny and swapping out a nylon gear for another one. Worked. Chevy trannies are the same?
It's been like this since new, tires are the factory issued size. Seller says well, it shows 85k miles, so maybe it's really got on 60,000.
Dan
I doubt it has a cable, more likely a VSS.
Check your rear end gears compared to what it is supposed to have.
On my T5 it needed both inner and outer gear to correct the speedo after a gear change, now it is less than one mph off.
That would be a VSS speedometer (electronic). It can be corrected in the ECM through the tune, no gears to swap out. Not sure exactly how to do it, but it can be done.
44Dwarf
UberDork
12/19/18 2:08 p.m.
Latham Speedometer Service
1137 New Loudon Road
Cohoes, NY 12047
44Dwarf
UberDork
12/19/18 2:09 p.m.
Latham Speedometer Service
1137 New Loudon Road
Cohoes, NY 12047
Not used them but know another who has. Seemed like good rep.
By my estimation, you just need tires that are around 25% taller. All-Terrain time!
