Help with a C4 leak

[pinenuts]

I have a leak at the gear selector mechanism/ neutral safety switch. How hard is it to replace the seal or gasket? It looks like I can get to it by dropping the front drive shaft, but I don't know what is involved in taking it apart and resealing it. My truck is a 1976.

 

[7d1]

It' real easy ,there is an o-ring behind the kick-down arm there are two types of o-rings,one is round the other is kinda flatend or squared. Any trans shop should have them. Dave

 

[iwlbcnu]

That is if it is the external seal, there is also an internal seal that requires dropping the pan and valve body. I did it in a day with no problems. I had a Ford shop manual though.

 

[pinenuts]

If the internal seal leaked, but the external seals were good, would it still leak at the shift rod?

 

[iwlbcnu]

One is sealing the kick down, and one is sealing the shifter, if it is leaking behind the NSS than internal, if leaking out the center of the NSS than o ring.
Think I got that right. I replaced both and it was pretty easy, I was only baffled upon reassembly due to getting the lever to hit the slide right. Took about 20 mins of playing before I got it figured out and haven't looked back since.