Ok. Tech question. I am going into my clutch install on my 75 Jimmy restoration project. It is a Chevy 350 motor. It had an automatic transmission and I am swapping to an SM465 manual. I just popped out the old pilot bushing. I am getting set to install the pilot bearing. I did a google search, as I am trying to find out if I need to lube up the roller bearings before installing and with what kind of grease. Factory manual does not specify (you would think a factory manual would be THAT specific!). I am reading several forums where guys suggest NOT using the roller pilot bearings and instead using a pilot bushing. I thought the bushing was used on the automatics and the roller bearings were used on the manuals. But apparently that is not necessarily so. When the clutch is depressed, this would be the only time that the transmission input shaft is not spinning the same speed as the crankshaft… is that correct? At this moment, wouldnt this call for a roller bearing to allow the crankshaft and the input shaft to turn at different revolutions? If there is just a pilot bushing in there, wouldnt the input shaft then be spinning metal to metal? This would in time, I would think, ream out the bushing? From what some are saying in the forums, they would rather have it spinning metal to metal, as this apparently would do little to no damage to the input shaft… whereas, if the roller bearings went bad, they are known to damage input shafts (score the shaft up). This makes some sense to me and I am having second thoughts about installing the new pilot bearing that came with the Napa heavy duty clutch I purchased. I thinking I should go to a pilot bushing. Thoughts?
Posted on: Sat, 03 Jan 2015 06:05:40 +0000
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