Posted by CenTex Farmall on March 18, 2011 at 13:15:22 from (166.183.173.17):
In Reply to: MD tranny teardown posted by BruceS. on March 18, 2011 at 10:56:43:
At least you did catch it early! I would wager that some debris or something caught between the gears led to the broken tooth.
The transmission is simple, just heavy parts. Have someone there when you take the pressure plate loose to get the clutch shaft out. You can do it by yourself but once on a SM when I had things loose and jockying things around the input shaft got loose and landed right on my neck! I was less than pleased.
Like they said use a cherry picker to remove the top; it lets you go slow up or down and pause to check shift fork alignment when it goes back on.
Pull the cover before pulling the input shaft. With everything still assembled grab the trans mainshaft right where 4th is and wiggle it around to see if there's a lot of play in the trans pilot bearing. You don't want to put it back together and then have that thing fail on you.
If you need "normal" part numbers for the other bearings just ask as a several of us have them handy. Ebay can be a good source believe it or not. Also Steel Wheel ranch.
With the top off and the oil drained you can thoroughly clean out the inside of the trans and rear. You'll likely find little bits of trash and metal. Get a sprayer and two 5 gallon buckets. Put one under the trans drain and one under the rear drain. Fill the sprayer with diesel and go to town washing everything. The junk will settle out or you can filter through an old shirt rag and run the diesel through over and over if need be. Some will be fairly clean and some will have goopy gunk.
Like Jim said, silicone is the hot tip for the top cover.
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