so i was just wondering if anyone had a good answer for me. i have my 90 auto that the speedometer doesnt read accurately and i changed the 10 inch cable and that didnt help so i took the dash cluster out and on the cluster where the cable for the speedo goes theres a broken peice of plastic which i would presume to be the problem. now i have a spare supra but its a manual 87 so i was wondering if i took the cluster or even just the speedometer part outta the 87 and put it in mine if it would work out. the obvious difference is my 90 reads to 160 mph and the 87 reads to 140. i dont know if this would have mean i would have to have it calibrated or what. so if anyone could help it would be greatly appriciated