I bought a "97 F150 that the PO had fitted with 265/75x16s. This tire size works out to be roughly equivelent to a 32 x 10.50, where the factory fitment is closer to a 30 x 9.50.
My problem is that when the speedo reads 60-ish, my actual speed is more like 70. The error is rather large, and it goes in a direction that exposes me ot speeding tickets -- if I set the speedo according to the signs, my actual speed exceeds the setting.
How is the speedo calibrated on my truck? On my '81 Jeep, I can pull a gear and swap it. Will my Ford truck be handled the same way?