Cheetosrdabest Posted April 27, 2017 Report Share Posted April 27, 2017 Just a post about the tach replacement I did for my '84 720 with the manual transmission in case anyone has gotten tired of not having a working tach and could not find an OE replacement. Got this eBay tach for like $24 USD to mount somewhere, but after taking it apart it looked like it was small enough to fit into the instrument cluster: https://flic.kr/p/UgGgZV eBay gage for 720 by S Hiles, on Flickr It was just a bit deeper than the OE gage that died years ago: https://flic.kr/p/Ud6i7U 720 tach replacement by S Hiles, on Flickr Just a little bit of plastic cutting to make room for the switch that changes from 4, 6, or 8 cyls and a couple of holes and it screwed right in: https://flic.kr/p/U57Kpz 720 tach replacement by S Hiles, on Flickr Pulled the OE needle and gage plate off the original one, drilled the little holes to mount it to the new gage front and very carefully made the needle hole a bit bigger with a hot stick pin and presto ! New tach that looks like the OE one: https://flic.kr/p/Ud6iqj 720 tach replacement by S Hiles, on Flickr Best part is that the three wires that are in the harness for the OE tach are the same as what the cheap new tach uses...just have to remove the resistor under the hood on the drivers side and jump across the wires to make it work...if I ever find an OE tach I just have to install and put the resistor back The response of this cheap tach is a little slow compared to the OE one, but a least now I can see my RPM's again and it looks just like factory !! https://flic.kr/p/TFJx9C 720 tach replacement by S Hiles, on Flickr 3 Quote Link to comment
Draker Posted April 28, 2017 Report Share Posted April 28, 2017 lol it looks nice!! Nice fix! 1 Quote Link to comment
Draker Posted April 28, 2017 Report Share Posted April 28, 2017 We can still find these tach's in the yards in the NW. But for those that can't.. this is a great option! 1 Quote Link to comment
Lockleaf Posted April 28, 2017 Report Share Posted April 28, 2017 Nice parts hack. 1 Quote Link to comment
Cheetosrdabest Posted April 28, 2017 Author Report Share Posted April 28, 2017 Thanks ! Yes it's getting hard to find parts for these around TN...every time I find one listed at the pick a pulls, they have been totally cleaned out of good parts by the time it get to the yard. I think these little trucks run for soooooo long that by they time they make it to the junk yard they are pretty much gone....especially for interior and body parts. And I learned how to attach a pic to this forum !!! Figuring out how to do that was harder than rebuilding the stock carb on the truck, ha,ha 1 Quote Link to comment
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