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cppursell · 12-02-2008, 01:35 AM

Hi,

I have a 1967 short bed stepside Chevy pickup that I've been fixing up with my cousin. It's great, but I'd like to have the speedometer to be accurate. Right now, it's about 20% off (when I'm driving 50 MPH is says I'm going 60). The cause of this is almost certainly due to the rear end gears on the truck being 3.54's, when the truck came originally with 4.11's (according to the glove box).

My question to you guys is this: what steps do I need to take to make the speedometer accurate again? Change gears of some sort, or put on a third party adaptor of some kind?

Thanks for your help! Here's a picture:

12-02-2008, 01:35 AM	#1
cppursell Registered User Join Date: Dec 2008 Location: San Francisco, CA Posts: 144	Speedometer not accurate Hi, I have a 1967 short bed stepside Chevy pickup that I've been fixing up with my cousin. It's great, but I'd like to have the speedometer to be accurate. Right now, it's about 20% off (when I'm driving 50 MPH is says I'm going 60). The cause of this is almost certainly due to the rear end gears on the truck being 3.54's, when the truck came originally with 4.11's (according to the glove box). My question to you guys is this: what steps do I need to take to make the speedometer accurate again? Change gears of some sort, or put on a third party adaptor of some kind? Thanks for your help! Here's a picture: