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Thread: Want to switch from 3 speed manual to powerglide

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    Want to switch from 3 speed manual to powerglide

    Can anyone tell me what needs to be changed to go from 3 speed manual trans to powerglide trans? Will the drive shaft still work with the powerglide trans?

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    VCVC Member kookykrispy's Avatar
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    Hi and welcome to the forum.

    Your driveshaft will work. The bellhousing/3speed is the same overall length as power glide, th350 short, and 200-4r, so you don't have to shorten the driveshaft when swapping in any of the aforementioned transmissions. All those automatics have 27 spline outputs. If you have the early sm-318 muncie 3 speed ('64-early '65), then I think those have a 16 spline output, so you'll have to change the yoke at the front of your driveshaft to match the 27 spline of the power glide. IIRC, the early non-synchro'd 3 speed muncie 318 transmissions had different 16 spline count on the output. If you have a late '65 or later van, you most likely have the saginaw 3 speed, which IIRC all had the 27 spline output. So in that event, the driveshaft and yoke should be the same on the 'glide.

    What year van are you working on?



    64' wikivan 292 tripower/4 speed/2.56 posi
    '64 Red Baron no engine/trans
    '66 "Lucky" 230/3 onda tree/project.. soon to be 400SBC/200r/3.73 posi

    Quote Originally Posted by Vanner68 View Post
    Remember, they're still printing money, but they aren't making any more earlies!

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    Welcome

    Welcome aboard.
    108VanGuy...
    1969 Chevy Panel, 250 CID, 3 ring 4 Spd. with OD, 2.73 "WedgieVan" Daily Driver
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    Quote Originally Posted by doitrite View Post
    Can anyone tell me what needs to be changed to go from 3 speed manual trans to powerglide trans? Will the drive shaft still work with the powerglide trans?
    If you are interested i have a powerglide transmission that has the correct tailshaft that will fit your 65 van, it came out of my 65 g10 van and is in good condition, i live in the Harrisburg Pa area

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