The Ford Barn

DBSHELTON · 05-12-2020, 06:54 AM

This may be a dumb question, but what is the easiest way to check the rearend ratio with an enclosed driveline? On an open driveline you turn the rear wheel 1 revolution and count the number of driveshaft revolutions.

Kurt in NJ · 05-12-2020, 07:47 AM

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What I do is make a mark on crankshaft pulley, put trans in 3rd, start with tire valve stem up(front works), move car till valve stem is in same place, count crankshaft turns---4 full turns + a little=4:11 ----3-1/2 = 3:54 3-3/4 = 3:78
its easier with plugs out, but usually I am too lay to do that, I just grab the tire and bounce the driveline slop against compression

05-12-2020, 06:54 AM	#1
DBSHELTON Senior Member Join Date: Sep 2019 Location: Kountze,TX Posts: 313	Rearend Ratio Check This may be a dumb question, but what is the easiest way to check the rearend ratio with an enclosed driveline? On an open driveline you turn the rear wheel 1 revolution and count the number of driveshaft revolutions.

05-12-2020, 07:47 AM	#2
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Rearend Ratio Check Sponsored Links (Register now to hide all advertisements) What I do is make a mark on crankshaft pulley, put trans in 3rd, start with tire valve stem up(front works), move car till valve stem is in same place, count crankshaft turns---4 full turns + a little=4:11 ----3-1/2 = 3:54 3-3/4 = 3:78 its easier with plugs out, but usually I am too lay to do that, I just grab the tire and bounce the driveline slop against compression