Big day today,
First a short followup post about transmission. (actually not so short but is simple)
Last we left it it'd been run (in the shop) with diesel fuel in it for a while and drained, still some sludge in the bottom so poured a little more diesel fuel in. That sat for a few weeks before and over Christmas. Today I drained the trans again, most of the sludge washed out. With a bent wire I scraped out some more sludge, sprayed some brake clean in the drain to wash the last out. The whole flushing thing worked out well.
Earlier I made a magnetic drain plug, I like to use them and they're sort of expensive to buy and cheap to make, so I make them.
Drain plug PICTURE 1 Drain plug PICTURE 2 The transmission output yoke seal seemed to be leaking a lot, time to replace the seal.
First to help remove the yoke I bought a handy, cheap, (but well made) tool. Though not entirely necessary on the transmission, it could be put in two gears at once, but it'll be most useful for holding the rear axle pinion in similar fashion.
Ratech Part number 18001
http://www.ratechmfg.com/Yoke%20tools.htm Yoke holding tool PICTURE Found that the bolt holding the yoke in wasn't very tight at all. I'm pretty sure the seal was leaking, and a good chance additional oil was leaking around the splines, washer, and bolt holding the yoke on.
PICTURE The original seal is GM (I think) and Chicago Rawhide part number 591448. The replacement is SKF and NAPA number 22336.
Seal PICTURE Removal and replacement was simple. The service manual suggest removing the whole rear cover to replace the seal. I just used a seal pulling hook, easier and no gasket to find/make, and replace.
To install the seal I used a little Permatex #2 on the outside, drove it in flush with the housing using a mallet and a round piece of stock larger than the seal and with a hole in it to clear the splined shaft.
Greased the sealing surface on the yoke and slid it back in. The washer had fretted on the bottom side so I turned it over, put some permatex on it, under the bolt head, and on both sides of the lock washer. The idea is to keep any oil that slips by the splines from escaping. Bolt gets torqued to 60-65 ft. lb. using that handy yoke holding tool.
Refilled with 80W90 gear oil, washed the shifter, smeared the moving parts with some grease and reinstalled it.
Next post, 4.10 rear axle gears!
Grigg
