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Re: Measuring pinion angle for Dana 60
[Re: Quicktree]
#174176
12/24/08 07:32 PM
12/24/08 07:32 PM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
don't listen to these old geezers 
Pinion Angle
Tired of breaking cases and drive shafts? There are many books that misled you on setting the pinion angle. For Drag Racing this is simple. You are trying to set the pinion angle to be parallel with the centerline of the engine & transmission on hard acceleration. To achieve this you must first figure out the parallel setting of the rear end to correspond to the angle of the engine & transmission, then add the proper amount of pinion angle. Add 1 deg. for 4-Link vehicles, 2 to 3 deg. for ladder-bar vehicles. Place stands under suspension to duplicate vehicle at ride height. Caution do not remove drive shaft without securing vehicle first. Take measurement with drive shaft removed.
Any one can regurgitate what they read in a book or repeat some one else.Are you gonna crap your self when some one disproves Einsteins Theorys?What if you have a trans angle that is acute to the working angle of the rear u-joint.Do you point the pinion nose into the dirt to give it that certain degree of relationship.No,you adjust the trans tail shaft angle to the working angle of the u-joints and the same with the rearend pinion angle,then adjust the negative degress for wrap up alignment under load.The relationship of the trans angle and pinion angle is determined with what links them together,I read somewhere it's called a driveshaft or propeller shaft.Once you establish the geometry of the best working range of the u-joints you have created the plane of alignment.Now you adjust for reaction movement(final alignment under load)static pinion angle to torque load movement.Since the trans is in a fix position and only the rearend rotation is the only reaction movement,1 degree with 4 link,2 degrees with ladder bar and 4 to 6 degrees recommended for ,springs,you are ready to set your pinion angle to the shaft.I read this some where long,long ago.I think this crap was studyed very hard on when driveshafts were were a fixed solid tube with a ball and trunion joint at only one end.Anyone remember those?Your turn 
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