I am cleaning stuff in my tumbler and when I was putting this one in the tumbler today I noticed it doesn't have a seal in it. I never realized not all of these were the same design. There are some with a seal inside to keep the oil from coming out past the gear. To me, this design would be more prone to oil leaks? Anyone else ever noticed this? This one would fit Powerglide, older TH350, Muncie, Saginaw and I think Borg Warners as well?
I noticed on my Borg Warner T-10 that it was missing the seal. I just thought that it was just missing as all the replacement ones on line seem to include it. Will have to pull it out and take a closer look at it and see if the end is shaped like yours .
Ian
-- Edited by Beaumont4008 on Wednesday 26th of October 2022 04:14:54 PM
The driven gear has a labyrinth to pull the gear oil back into the trans.
It seems that even with those gears they can still leak. The o-ring on the outside of the bullet often leaks though too.
And those other bullets that are some kind of alloy material are even worse because the gear wears the hole in the bullet into an oval shape allowing oil to get past it. The steel bullets are certainly better.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
The last comment on the "steel bullet" rings a bell. Having a 72 Corvette for 27 years with a Muncie. I remember mine leaking a couple times. Replacing the "O" ring fixed part of it, then a new bullet because of the wear problem, new speedo gear too, make sure the speedo cable end threads were in good condition, pack the gear with grease before install and a THIN film of silicon gasket maker on the O ring helps.
Don't install synthetic oil in the tranny, it will leak for sure, just good quality Dino oil. That should keep it leak free for a couple of years...
