LemonHunter 583 Report post Posted November 3, 2019 So, picked up my new E36 on the Weeke d, it's auto, but has the 3.6whatever LSD medium case diff. The tires are one profile higher than spec, 235/45/17 rather than 235/40/17. However what I'm dealing with is 100km Road speed (GPS and SID Confirmed) is around 82kph on the speedo, 50 around 39ish... And while I've got a pretty good butometer, it's a bit of a pain in the ass glancing down at the GPS all the time to confirm speed. Is this somthing I can change in the ecu? Or do I need a pulse modifier on the wire somewhere, or a new sender, or a new cluster? Quote Share this post Link to post Share on other sites
sweetm3 180 Report post Posted November 4, 2019 (edited) Hi EurolessNoMore That profile would show 2kmh @ 50 to 4kmh @ 100 kmh speed increase. Something more interesting is a foot Found this https://www.bimmerforums.com/forum/showthread.php?875056-DIY-Optomistic-Speedometer-Repair-(Needle-Position-Fix) Edited November 4, 2019 by sweetm3 Quote Share this post Link to post Share on other sites
LemonHunter 583 Report post Posted November 4, 2019 Sweet ill check that out. The other quirk that is probably related is the fuel consumption guage is off by about 10L/km, shows 20L/km when cruising, which would be lovely, but yeah... Quote Share this post Link to post Share on other sites
