Axle Retainer Nut Torque w/ Green Bearings?

well I am sure we all know the 741 is suppose to be the 10 bolt chevy rear of Mopar 8 3/4" rears. :)

Now the 489 and the 742 are some times a toss up

Some people think the 489 is better because of the big shaft 1.875 bearing but also takes more material out of the case which some say make it weaken the case...??? 489 uses a crush sleeve which in racing may not be the most desirable either.

742 case around here by most racing use it because it has the sold crush sleeve the shaft is still big but not to big to at 1.750 and conserder this a reason to help keep the case stable for hard drag racing.

My biggest pet peeve is MAKE CERTAIN YOU build the rear correctly and it will treat you right even the 741 for some mild track runs is NOT out of the question.

489 for me personally are easier to set the pinion because of the crush sleeve - the solid crush sleeve requires more work (assemble reassemble etc. ) to fine tune the preload correctly.

SO if you are going by size smallest to largest 741 742 489

742 489 will be always a personal choice I believe. Both will do the job. :)

:burnout:

Jim
J D Race