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Old 12-22-2011, 03:38 PM
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adantessr adantessr is offline
'23 T-Bucket Pickup
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Originally Posted by whyholdback
Something is wrong. 700R-4, 3.08:1 and 295/50R15 should be 1900 RPM @ 70 MPH, and 1350 @ 50.
Is your torque converter locking up? Is your speedometer calibrated? It should be an 18 tooth drive gear, and a 42 tooth driven gear.
Okay , I actually never checked the ratio other than walking alongside as I rolled it along and watched the driveline. It may be 3.23 or 3.42. Not sure, just a guess. It really doesn't matter to me. I just like the way it runs. I have checked the speedometer against my GPS and know that I am going 70 or 71 when the speedo reads 65. So, just saying the tach reads about 2100 in lock up when the speedo reads 65mph. The speedo is electronic and programmable, but is close enough for me , 40 is actually about 41 and 50 is almost 52. Not far enough off to mess with.
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