T56 Input shaft bearing question - Page 2

85MikeTPI · 10-22-2009, 07:22 AM

Quote:

Originally Posted by danbo313

Hmm, I'm pretty sure I found another potential source of noise.. The Mainshaft large taper bearing should probably not be spinning on the shaft.. I was able to dismantle most of my mainshaft without a press, well i should say most of my tranny without a press or puller.

The mainshaft bearing is not a press fit, but it should not spin on the mainshaft either.. That again points to too-much preload, or your drivetrain (driveshaft) binding.

danbo313 · 10-22-2009, 12:38 PM

When i put this thing back together, how do I keep the front race from spinning if the new one is as loose as the current one? I've heard of the old method of going around the cut out in the midplate with a center punch then putting lock tite on the outside of the race and install it.

I don't think the driveshaft was binding, i as able to slide it forward on the spines when I removed it. Maybe i should've had some more grease on the splines so it could slide in and out easier??

85MikeTPI · 10-22-2009, 01:45 PM

If the midplate bearing cup is worn, you should replace the midplate. You have to be able to remove the bearing race to shim the bearings, you don't want it staked or locktite'd into place.

Ideally, the roller bearings should have less resistance/friction turning than the race rotating in the cup. If your midplate is slightly worn, you may just want to shim it back with slight end-play instead of pre-load, this should keep the race from turning as long as the bearing is in good shape.

The driveshaft binding is when the rear/drivetrain moves/rotates forward, pushing the driveshaft into the transmission and bottoms out. If you only have about 1" or less of slide in your driveshaft (suspension loaded), it's probably bottoming out during braking,etc.