Before anyone makes a crack about the "invisible" part, I don't have pics of it...what "it" is, is a Stewart Warner piece that was screwed into the speedometer cable port on a Saginaw 3 spd gearbox, I first thought it was to adjust the speedo for oversized tires/gearing...but it appears to be a 1:1 drive...it's not a straight through box, but rather a dog-leg about 2 inches long...is it indeed what I thought it was? I'll try to get the serial number for you guys later...
sounds like something for clearance, like going around crossmember. with 1-1 ratio thats my guess but after looking at the picture probably a yugo part.
It should be for correcting ur speed it may only be 0.90-1.10 correction. you may have to turn it 10 revolutions to see it turn9-11 times, if ur doin 66mph and only reading 60mph. 4wd's may use as much as 2.5-1 but recheck it, some cars offered more than 1wheel/tire combo and corrected the speedo by this item only camaro/nova with 195/70r14 w/o,235/60r15 w
The Jalopy Journal
