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Username Post: Powerglide ?
Posts: 909

Reg: 12-09-07
02-04-19 09:25 PM - Post#2759045    
    In response to PLS

If you go much beyond the half way mark, when you turn the car off and it sits for some time it will puke out the filler tube as the converter will drain back into the trans. Couple things I would check the hose down at the vacuum modulator, pull it off and see if trans fluid comes out. If it does your vacuum modulator has a ruptured diaphram and will need to be replaced. That alone could cause erratic shifting as well as poor acceleration. What type of fluid are you using in it now. I believe most trans builders recommend using the Type F (yup Ford trans fluid) in the old slushbox since the original type fluid is no longer made. Aside from those couple things I would say you need to find an old wrench that knows how to properly check out the trans not that easy to find anymore.
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