I have a muncie with stupid JAP bearings that some complete retard put in the **** tranny. The imput shaft is shakin all kinds because of this so what i need to do is have both bearings replaced. The Casting number on the main side is 3885010 and on the shift side is 3884685. Where is a great place to get these bearings and how much am I looking at spending?? a local shop which looked into it is wanting to charge around $75 for both bearings. how about a little help?? I've ran a search on Yahoo for the bearings and i get no help, all i get is rebuild kits, which i don't need because the tranny was rebuilt recently so i would just like to finish the job with the correct AMERICAN bearnings that belong in the **** tranny.
That shakin' is a worn-out pilot bearing, and not necessarily the trans. The input shaft relies on the pilot bearing as a second support. If you just grab the nose of the sahft with the trans out of the car, it will move around a little.
Replace both bearings (Input and pilot) if you want to be really, really sure.
I already have replaced the pilot bearing, sadly to say from a roller bearing to something more like the original. But i have no clue where i could get an imput shaft bearing?? or the other bearing that goes in the back of the transmission. So what I am asking for is a site where I could go and buy the Bearings and only the bearings not a full rebuild kit.
Not to butt in - but - I have built my fair share of Muncies and have found that the Japanese bearings were actually some pretty good units. More likely what has happened is that one or more needle bearings inside the input shaft that support the front of the main-shaft has dropped out when the transmission was assembled. It happens very easily! They will shake like crazy if put in the car this way. The real bad part is that it will wreck the transmission case if driven like this for very long because the front bearing on the input shaft is carrying too much of the load.
I typically use thick black wheel-bearing grease to hold these needle bearings in place while assembling the box.
This is a good manual trans website and can help with bearing kits, overhaul kits, installation videos, manuals and diagrams. Paul will even answer any technical questions you have.
As far as the bearings comment - I agree that it was probably incorrect reassembly, not Japanese bearings that caused the problem. It has been my experience that bearing manufactured in Japan tend to have closer tolerances, better fitment and last longer.
