rwljpl
Full Access Member
- Joined
- Mar 11, 2017
- Posts
- 112
- Reaction score
- 20
- Location
- Alabama [AL]
- First Name
- Rich
- Truck Year
- 1987
- Truck Model
- 1500
- Engine Size
- 383
so I got my speedometer working but it’s off — it underreads by 15-20 mph. I have an np203 from a 1977 but the cab, including gagues, is a 1985. I have been told I have 3.73 gearing (front and rear) but I have not chrcked gearing myself. I have 33” tires. The speedometer gear is all metal. See pic. Can I do anything to fix this and get a more accurate reading on the speedometer?
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