gsxr1300
Well-Known Member
a quote from EXP Jawa
from here http://www.mustang6g.com/forums/showthread.php?t=41426
"The play you're feeling at the companion flange is the combination of spline, diff, and ring & pinion lash. That's actually where Ford measures it at the factory - and where the R&P ratio makes the most appreciable difference. Again, they all have to have some lash as such just to assemble the parts and make them run and mesh properly, but the more it is, the more it will be noticeable.
And again, the 3.73 definitely plays a role here. Lets say, just for shits and giggles, that the total lash in the differential and axle splines is 1.5 degrees of rotation (not a terribly unreasonable number). With a 3.31:1 final drive ratio, that translates into a measurement of 4.96 degrees of rotation when measured at the companion flange. Using a 3.73 ratio, that becomes 5.6 degrees - about 12.5% higher lash - and is kind of a big deal if your system spec has a limit of 5 degrees.
"
from here http://www.mustang6g.com/forums/showthread.php?t=41426
"The play you're feeling at the companion flange is the combination of spline, diff, and ring & pinion lash. That's actually where Ford measures it at the factory - and where the R&P ratio makes the most appreciable difference. Again, they all have to have some lash as such just to assemble the parts and make them run and mesh properly, but the more it is, the more it will be noticeable.
And again, the 3.73 definitely plays a role here. Lets say, just for shits and giggles, that the total lash in the differential and axle splines is 1.5 degrees of rotation (not a terribly unreasonable number). With a 3.31:1 final drive ratio, that translates into a measurement of 4.96 degrees of rotation when measured at the companion flange. Using a 3.73 ratio, that becomes 5.6 degrees - about 12.5% higher lash - and is kind of a big deal if your system spec has a limit of 5 degrees.
"
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