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  1. 6

    Canadian "Pre-CUCV" Chevy

    Hi, I just found this thread. I appreciate the good info on here because I work at the Ontario Regiment Museum in Oshawa and we're in the process of restoring a 1976 5/4. First of all, no bloody wonder they were gas pigs. With a 1976 350 SBC making maybe 150 HP, pushing a 1 ton chassis, with a...
  2. 6

    Testing the Shifting of a Hydramatic Transmission After Rebuild

    Here's a video of how we tested a Hydramatic transmission for shift points and leaks after a rebuild. Obviously, this test doesn't confirm bands and clutch will have solid engagement under load, but it gives some confidence the transmission will shift and not leak in the vehicle. Malcolm...
  3. 6

    Hydramatic oil cooler question

    Yes, those are the ones. The ones I took out were not solid rubber but a fibre-reinforced material. Very hard but that was probably their age. The AN6225 ones are solid rubber, quite pliable, but on the hard side. Since some of the vendors offered the seal in 70 or 90 durometer, the harder 90...
  4. 6

    Hydramatic oil cooler question

    I checked out the v-cup packing i got in the g749 seal kit from Brian asbury. They had " AN6225-25 moulded into the rubbber which is a standard v-cup packing part number. Looks like a few companies sell these. Malcolm
  5. 6

    Hydramatic rear servo/band setup

    While I had the valve body apart, I made this video of some of the components and how they work. Malcolm https://youtu.be/tlgen9REnMg
  6. 6

    Hydramatic oil cooler question

    Here's a sketch of the setup, with the chevron seal sizes, which are as NDT posted above. It also shows the dimensions of the steel expanding ring and the gasket on the cooler side of the pan wall. Note the leak-off port drilled in the pan wall. This allows any oil or coolant leaking into the...
  7. 6

    Hydramatic oil cooler question

    No, not that type of hydraulic packing, but very like the "Vee Packing" shown on this site: http://www.veepacking.com/ The shape the diagram shows as, "Female adapter (top)" is actually machined into the wall between the coolant compartment and the oil compartment. The part shown as "V ring...
  8. 6

    Hydramatic oil cooler question

    As Dave Doyle suggested above, I contacted Brian asbury. He has a Hydramatic seal and gasket kit specific to the G749 that includes these cooler seals. One is on its way. The bonus is he is not that far away from me so no long waits and no hassle with customs. Malcolm
  9. 6

    Hydramatic rear servo/band setup

    Ben, the tank belongs to the Ontario Regiment Museum in Oshawa. I volunteer and this is my latest project. The Caddy V8's run well but the trannies were really acting up. The one in the videos was slipping as I mentioned, and I found the clutches were shot in the front unit in the other one, and...
  10. 6

    Hydramatic rear servo/band setup

    You have a Chaffee?? How does it drive? Specifically, how well synchronized are the two trannies when driving? That's the problem with ours I'm trying to fix.
  11. 6

    Hydramatic rear servo/band setup

    I bought the rebuild kits and frictions from Kingomatic in Toronto because of the quick delivery. I wasn't too impressed. In all my searching for parts, I was impressed by autotran.us. I would try them next time. The civvy kits that these companies supply are missing some key gaskets and seals...
  12. 6

    Hydramatic rear servo/band setup

    Here's a video on how I did the front servo/band setup. Malcolm https://youtu.be/onBkjvwGgEs
  13. 6

    Hydramatic rear servo/band setup

    Hydramatic front and rear servo/band setup and valve body description Some videos I took when setting up the rear servo on a 1945 Hydramatic from a Chaffee tank. I'll show the front servo on a separate video. Malcolm https://youtu.be/BQpR4ApSOd0 https://youtu.be/RqM21bW7uzs...
  14. 6

    Hydramatic oil cooler question

    The M135 manual says torque those nuts to 140 ft-lb! I'm not sure my spanner wrench is up to that. If not, I'll aim for red-faced tight. There is some leeway - the cavity between the gasket on the coolant side and the u-cup seal on the oil side has a drain port so if one or both leak, it ends up...
  15. 6

    Hydramatic oil cooler question

    Thanks, we get a lot of stuff from Brian. I'll see what he's got. I see the nuts that clamp these cooler seals need 150 ft-lb torque, according to the M135 tranny manual. I'll give it my best shot but I'm not sure my spanner wrench is up to that, even with a cheater bar. I'll aim for red-faced...
  16. 6

    Hydramatic oil cooler question

    5342366, and 5342367, are the parts I need. 5342367 is a simple, circular fibre gasket I can make if I have to, but 5342366 is an unusual u-shaped seal, like those used in valve stem packing. Is this what you saw in McMaster Carr? Do you have their part number? malcolm
  17. 6

    Hydramatic oil cooler question

    Hi, I work at a military museum in Oshawa, Ontario, Canada, and I'm rebuilding the two Hydramatics that sit in front of two Caddy flathead V8's in a 1945 Chaffee tank. These trannies were specific to tanks but are similar to the ones used in the M135. I know the Chaffee uses the same oil cooler...
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