Hi All,

My truck decided it wanted a new clutch, 1983 F350 6.9 4X4, I have the tranny out and the 12" clutch kit bought along with the 2 output seals for the transfer case. I'm getting ready to pressure wash the tranny so I made a plug for the speedo attachment point and plugged the vent off of the transfer case, I put the shifter back in the tranny and taped it up good for a seal. Are there any other ways for water to get into tranny or transfer case?

I already discovered that I need to seal the flywheel bolts to prevent oil leaks and I am thinking about replacing the rear main seal it has a bit of oil around it but not enough to run down the back of the block, whats the general thinking about the rear main seal?

Any other things I need to be thinking about while I have this thing apart?

Thanks for any insight.
Brian

 

I think the tranny has a breather too but I don't know where or how it's located. Make sure to change out the pilot bearing in the end of the crankshaft also. And put just a tiny bit of lube on the tube on the input of the tranny where the throw-out bearing slides.

If you have gear clashing problems, and that was the problem beforehand also, then you need to check the firewall, high mileage manual trucks with hydraulic clutch systems like to crack the firewall where the clutch master mounts, and where it's welded together in the wiper area.

 

Thanks Franklin, I found the breather on the tranny after I started pressure washing it, it was totally buried in the gunk, fortunately I saw it before I filled the tranny with water... Yes new pilot and throw out always, I learned that lesson way back when I was about 17.

After getting the clutch out and looking it over the PO really did a good one on this. They replaced the clutch but didn't re-surface the flywheel which had a dish in it of probably .020"-.030" which is bad enough by itself but they did even better by upgrading to the 12" clutch without re-surfacing the flywheel... The new clutch only had the outer 1/2" making good contact with the flywheel which then overheated the outer ring, glazed the disk and caused it to chatter horribly on starting out, I couldn't get it off the line in 2nd it chattered so bad, had to use 1st. By the time the chattering caused the failure, spit out a spring, it had only worn down enough to have 1/2 the friction material touching the flywheel. and the rest looked new, in the pic you can see the shiny part that was making contact.


After getting the tranny cleaned up I found the bearing retainer was badly worn from the throw out bearing and not being able to find one locally I decided to fix this one, I put it in the lathe and measured almost .040" wear from the TO bearing, I turned it down .035" and cleaned up almost all the wear.


I bored out a piece of tubing from the scrap pile to fit and pressed it on.


then turned it down and polished it out. Now I have a steel sleeved surface for the TO bearing to run on.


The other thing I noticed when I took this off was it appeared to have been over torqued, the gasket came out in 4 pieces, the sections between the bolts completely cut at the bolt holes. I checked for flatness and sure enough it was pretty bad. I touched it to some sand paper on a flat surface and it only touched on the bolt holes.


A little more lapping and I think it's good to go, just need a new gasket and seal.


It took about 2 hours to do the repairs and it's a 2 hour RT to the closest place that might have had the part so not much time lost.

Time to finish cleaning everything up and put it back together.

 

Nice work!

You can come over and fix my truck any time.