Finding right speedo gear. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Locutus · 01-12-2004, 08:39 AM

My speedometer is bouncing all over the place. I figure this to probably be the gear in the transmission(as that was what it was the last time I had this problem in my 72), but I know it could also be the cable or the speedo itself. Since I put new tires on my truck I need to change the gear anyway I figured I would start there. How do I figure out which gear to get. Is there a formula to use. I know tire size and rear end change it. My tires are 31's but I do not know the rearend at the moment.

Mike

shuttermutt · 01-12-2004, 09:49 AM

Try this thread.

01-12-2004, 08:39 AM	#1
Locutus Registered User Join Date: Jan 2003 Location: Santa Fe, Texas Posts: 249	Finding right speedo gear. My speedometer is bouncing all over the place. I figure this to probably be the gear in the transmission(as that was what it was the last time I had this problem in my 72), but I know it could also be the cable or the speedo itself. Since I put new tires on my truck I need to change the gear anyway I figured I would start there. How do I figure out which gear to get. Is there a formula to use. I know tire size and rear end change it. My tires are 31's but I do not know the rearend at the moment. Mike

01-12-2004, 09:49 AM	#2
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	Try this thread. __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list



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