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da89cup · 10-19-2008, 04:53 PM

89 mustang lx, 5.8L, 4.10s, manual 5spd. When I bought the car, it had 2.73s & the speedo was fine, this is in Canada, so it goes up to 200km/h. After I changed to 4.10s, I haven't been able to fix the problem. If I'm going 60km/h, it reads 100km/h. I already tried the 23 tooth speedo gear but it didn't help. My tire diameter hasn't changed since, so I don't know what else to do. The only thing that's different is the cluster, it's out of a 4cyl mustang. Could this be the problem? thanks

10-19-2008, 04:53 PM	#1
da89cup Registered Member Join Date: Feb 2001 Location: edmonton, alberta, canada Posts: 55	speedo problem 89 mustang lx, 5.8L, 4.10s, manual 5spd. When I bought the car, it had 2.73s & the speedo was fine, this is in Canada, so it goes up to 200km/h. After I changed to 4.10s, I haven't been able to fix the problem. If I'm going 60km/h, it reads 100km/h. I already tried the 23 tooth speedo gear but it didn't help. My tire diameter hasn't changed since, so I don't know what else to do. The only thing that's different is the cluster, it's out of a 4cyl mustang. Could this be the problem? thanks __________________ 89 coupe, 351W, 351W heads, 30lb injectors, 190lph pump, 80 maf, 70 tb, ? cam, cobra upper, gt 40 lower, 4.10s, (14.1@98)