jcharb

Where are you based mate? I thought they had fire rings, Ive got a set of gaskets there and Im sure that they have removable rings. I must be wrong. Thanks for that. Has that been changed to a twin plate? I have a 71 F785 with a cable operated push clutch. Skip

I am out Fla.The line sheet for the truck shows it came with the spicer pull type clutch.

I am looking at buying a truck with a T864 in it. I had trouble with a 711 back in the late 70's and I went back to the 673. The 711 cracked between the two counterbores. I am concerned I might have the same problem with the 864. I need to use it for about 20k loaded miles a years, so I need it hold up, not just be a "show" truck.

Seems like I should look for an 866 for a backup.

On a related topic, did the 864 and 865/866 have a Mack single disk clutch? Can you replace the Mack clutch with a Spicer angle spring? Do you have to replace the rear housing and move the transmission mounting brackets?

I have a 71 F model with a end864 (naturally aspirated ) It has a spicer twin disk . The head gaskets do not have fire rings. I took mine off the road, its to hard to get parts for the 864. I even bought a complete engine for it, just for parts. The truck is all original, I have line sheet for it. I now use it for a boom truck in the shop.