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Another powerglide question......

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Old Jun 3, 2022 | 03:30 AM
  #1  
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Default Another powerglide question......

The last time I drove my 56 Chev Convertible I was out on the highway and driving it pretty hard, using the passing gear a few times just to feel the little 265 scream. I got home and put it in the garage and it puked tranny fluid all over the floor! What do you think blew? It lost most of it's oil that day.......and I just dread getting under it to take it out.....those cast irom trannys are really heavy and I ain't got no fancy lift!
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Old Jun 3, 2022 | 08:49 PM
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Originally Posted by Kerrmudgeon
The last time I drove my 56 Chev Convertible I was out on the highway and driving it pretty hard, using the passing gear a few times just to feel the little 265 scream. I got home and put it in the garage and it puked tranny fluid all over the floor! What do you think blew? It lost most of it's oil that day...and I just dread getting under it to take it out.....those cast irom trannys are really heavy and I ain't got no fancy lift!
My guess is you had it overfilled to start with and at shutdown it spiked and vented. Is the fluid good or does it seem overheated? The Power-Glide reputation as a leaker relates to an overwhelmed case from the contents of the converter. Though some leakage seems baked in to both versions - iron and aluminum - My guess is enough wear on the converter hub allows drain-back on cars that sit unused. This raises the pan level past selector shaft and fill tube seals and results in the infamous Power-Glide puke.

I doubt you lost all your ATF. It always looks like more spread out on the floor. Remember to check fluid level with the car at operating temperature on level ground.

Dan
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Old Jun 3, 2022 | 10:20 PM
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Originally Posted by dplotkin
My guess is you had it overfilled to start with and at shutdown it spiked and vented. Is the fluid good or does it seem overheated? The Power-Glide reputation as a leaker relates to an overwhelmed case from the contents of the converter. Though some leakage seems baked in to both versions - iron and aluminum - My guess is enough wear on the converter hub allows drain-back on cars that sit unused. This raises the pan level past selector shaft and fill tube seals and results in the infamous Power-Glide puke.

I doubt you lost all your ATF. It always looks like more spread out on the floor. Remember to check fluid level with the car at operating temperature on level ground.

Dan
Thanks Dan. First, it's a professionally rebuilt original unit, done years age but with hardly any mileage since. Level was perfect on the stick that day. I always check it before any longish trip. Nothing showing on the stick right now........
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Old Jun 4, 2022 | 12:14 AM
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If I am not mistaken Roy Braatz covered this
If I remember right is a seal that is made correctly that doesnt allow for drain back
I shut mine off in reverse - supposedly helps
See if I can find Roys article......

Chris
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Old Jun 4, 2022 | 06:05 AM
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Originally Posted by csherman
If I am not mistaken Roy Braatz covered this
If I remember right is a seal that is made correctly that doesnt allow for drain back
I shut mine off in reverse - supposedly helps
See if I can find Roys article......

Chris
I'd like to see Roy's article as well . . . . .
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