RE: rear end gear ratio
Thanx level2 I found the axel code on the door tag. It's an 84 which tells me I have an open 7.5 ring gear and a 3.45 gear ratio. Just had a remanufactured engine and tranny put in but the pinion gear they sent me for the speedometer is way off. i'm registering about 10 miles an hour slower than I'm going and a little over a tenth less on the odometer. Was told once, each tooth on a pinion gear adds about 2 1/2 mph to the speed reading so sounds like I need about 4 more teeth on my pinion gear. Please correct me if I'm wrong as I will be going saturday or maybe friday to get a replacement. again thanx for the info I have had this truck since nov 86 it had 73 mi on it and now has 440,000 on it. Can't complain about it at all!