Jim, when I put in my car's former 3.55:1 Sure Grip, and with its then smaller-than-OEM sized tires, the car's odo was about 19% (IIRC) too fast (as observed, driving past mile markers). Dave Homstad told me about a company that makes/sells odometer 'Gizmos', which are a small self conatined object, that inserts between the end of the speedo cable, and the transmission- and which adjusts the cable speed to the OEM odometer specs. After I replaced the 3.55 with the OEM 3.36 gearset (the 3.55 was 'noisy', got a lot worse highway mileage--like about 10-11--and had only marginally better performance) , installed Diamondback radials, which are virtually the correct height, and removed the Gizmo, the odometer began recording scarily-accurate readings, like within about 1% +/- . Now, since I've got a 2.76 gears installed, I find that the odo is about 13% too slow; the speedo is way too slow, too. So, if I ever get off my duff, I gotta go get another Gizmo. BTW, I recall that, when I ordered my Gizmo (you have to tell them the % of adjustment you need to have them to dial-in to it), you have to tell them that the trannie-end-fit is the same as a that for a "Chebbie". I just can't remember where I bought that Gizmo!---think that they were in one of the Frozen Tundra states. Neil Vedder ************************************************************* To unsubscribe or set your subscription options, please go to http://lists.psu.edu/cgi-bin/wa?SUBED1=l-forwardlook&A=1 --- Begin Message --- |