Speed warning internal gears - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 09-09-2014, 05:10 PM

In my ongoing quest to make a perfect speed warning speedo, I hit a snag when I popped the faceplate off (the two little screws on the front). With the plate came about 4 little plastic gears and bushings that, since I didn't expect them, I didn't see the order of.

Maybe I'll get lucky and figure it out from first principles, but if anyone has a diagram or photo of what's going on right behind that faceplate that'd sure help.

A long shot, I know.

Thanks!
Dave

chewychevy67 · 09-09-2014, 05:21 PM

hope this helps you. the purple spots in the middle of the bushings are the plastic screws that broke off in the thread. yours shouldn't be. the grounding strap should also be under the right bushing which is not in the picture.

**leddzepp** · 09-09-2014, 06:10 PM

Be very careful with the two non-plastic (carbon fiber?) gears. They break if you look at them sideways.

09-09-2014, 05:10 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Speed warning internal gears In my ongoing quest to make a perfect speed warning speedo, I hit a snag when I popped the faceplate off (the two little screws on the front). With the plate came about 4 little plastic gears and bushings that, since I didn't expect them, I didn't see the order of. Maybe I'll get lucky and figure it out from first principles, but if anyone has a diagram or photo of what's going on right behind that faceplate that'd sure help. A long shot, I know. Thanks! Dave __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-09-2014, 05:21 PM	#2
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,438	Re: Speed warning internal gears hope this helps you. the purple spots in the middle of the bushings are the plastic screws that broke off in the thread. yours shouldn't be. the grounding strap should also be under the right bushing which is not in the picture. Attached Images

09-09-2014, 06:10 PM	#3
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,995	Re: Speed warning internal gears Be very careful with the two non-plastic (carbon fiber?) gears. They break if you look at them sideways. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man



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