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I bought a 75 F-100 4WD w/ 360. Has a transplanted 4bbl. and manifold according to the on-line VIN site. Of course this being a $350.00 cow field special but with a very strong clean motor. The only problem now after complete brake overhaul is that it wouldn't shift into reverse without jiggling the linkage from underneath. Also had a rattle inside so I dropped the pan and found a rod with a **** on the end (Connected to the linkage but on the inside of the trans.) dangling that is supposed to engage the transmission into Park. My question would be, Am I missing some parts that hold this thing up? Should there be some sort of guide directing this rod into the hole straight across? Also this rod seems to be bent and would possibly not fall out of the hole if it was straight. Any suggestions? Would I be messing up to cut this thing and use my emergency brake(newly overhauled) for my Park?
There should be 4 or 6 larger bolts in the valve body that hold it into the transmission. You should be able to remove the valve body and then index the linkage levers with the valves they operate and then check the operation with the pan off before you reassemble it. I changed linkage from a car transmission so it would fit my father's truck (externally) just last week. I had to remove the pan and the valve body to get the old linkage out and the new linkage in. Don't cut off the levers or modify them... if they're bent, straighten them so they fit the corresponding parts on the valve body. (One should be a kickdown lever which depresses a spring loaded valve) and the other operates the P R N D L position. If you can, check another C6 to see how the linkage is supposed to be oriented.
Thanks for the reply Adam. This rod is technically a "valve" I guess. I just can't determine how it would be held into place to go straight towards the fly wheel to engage park instead of down towards the pan. I operated the linkage without the pan and can tell that the valve is slung up into position when I operate the external linkages manually in a quick fashion. Should there be a guide for the valve or something holding it up such as a clamp from the linkage. Or does it not supposed to come out of the hole in the front of the transmission? In that last case I would imagine the valve rod would have to be straightened to fix the problem.
From what I remember the park engagement mechanism was located in the back near the tailshaft, not up front on the flywheel. I don't remember any valve that would need any type of support... everything in the valve body is self contained. Are you sure you're working on a C6 auto?
I'm positive it's a C-6. It's an early year 1975 C-6 transmission. I had to compare filters to get the correct kit. During mid-year 1975, the filter got smaller. I will double check the direction of the valve this evening when I get home. It shure seems that it was going towards the front but I was laying upside down on my back and looking up and can very well be wrong on the direction. While manually jiggling the linkage, I counted the notches and placed the valve in the hole when Park was engaged (all the way up on the column).
[font size="1" color="#FF0000"]LAST EDITED ON 09-May-01 AT 08:00 AM (EST)[/font][p][font size="1" color="#FF0000"]LAST EDITED ON 09-May-01 AT 07:58 AM (EST)[/font]
Adam, you're right. The valve is located towards the rear. I just can't see any means to self contain it up though. Then again, a combination of a bent linkage and valve rod may cause this thing not to be self contained and come completely out of the hole. I will probably disect it this weekend and bend everything out straight and see what happens. I DID notice two bolt holes at the entrance for the valve like some sort of guide is supposed to be there.
The rod you found is most likely the parking pawl actuating rod. It's mechanical, not hydraulic. The rod has a lot of bends in it so trying to reshape it might prove difficult. The end with the ball and rod goes through a hole in the back of the housing and into a bracket that holds it in place. The bracket is held in place by two 1/2" bolts. You may have to remove the tail housing to check the parking pawl and return spring.
Thanks too much. I see the two tapped holes for the bracket. If the bracket is in the same main housing as the rod and linkages, It's gone! Nothing in the pan so I'll be searching for parts. I just knew something had to be missing.
[font size="1" color="#FF0000"]LAST EDITED ON 10-May-01 AT 01:41 PM (EST)[/font][p]Just for the record if anybody else runs across this part mysteriously missing or broke, Ford dealership does not produce this bracket for the parking pawl actuating rod for a C-6 anymore since 1997. And of course Salvage yards only want to sell you a complete transmission. So I've decided to fabricate me a simple sleeve to attach to my transmission block to hold the actuating rod up. Sounds easy? If anybody has a spare C-6 for parts (Even though these things are too tough to brake to just be worth parts), feel free to let me know.