Quote:
Originally Posted by vstech
... duh. good point tom, the speedo and tach would read exactly the same... unless the mechanic changed the speedo along with the diff... which is unlikely. so my post is useless...
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Your post isn't useless. We just need to modify the data to show what the indicated speeds would be at the various rpm's. This makes the assumption that the vehicle originally had the proper 3.07 diff from the factory.
3.07: 2750 rpm @ 60 mph (indicated 60 mph)
2.88: 2600 rpm @ 60 mph (indicated 56 mph)
2.47: 2250 rpm @ 60 mph (indicated 48 mph)
The indicated readings are what the speedometer would show with the stock speedometer calibration and the various diffs installed at the actual speeds the vehicle is traveling.
I'd be very doubtful if they sourced a 2.24. The 2.47 is the most likely.