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Old 05-22-2002, 08:57 PM   #1
bigjimzlll
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Post TH350 shifting question

I assume this is the right forum to post this..how do you make the tranny shift latter in the rpms...i installed a adjustable vacuum can, havent played with it yet....if i disconnect the vacuum line it dosent really effect the shifting to much, so I cant see what adjusting the can will do...is their something else that controls the shift points?...is it easy to tweak?..thanks
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Old 05-22-2002, 09:06 PM   #2
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The easiest way is to recurve the govenor. B&M puts out a kit for about $50,should be available through summit or Jegs. I went through that when i dropped the 4.10s in the longhorn. Good luck..........69
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Old 05-22-2002, 09:31 PM   #3
Longhorn Man
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Seems odd that unhooking the vac to the modulater doesn't do too much. It should rev to about 45 MPH (depending on your rear gears) when that line comes off.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
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Old 05-22-2002, 09:36 PM   #4
bigjimzlll
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it shifts at 4000 rpm wot connected and about 4500 disconnected....shifts real firm when its in drive, but kinda mushy when i manually shift from first to second,,,the second third shift is hard both ways..its supposed to have kevlar clutches and some trick stuff, but...i dont know..getting ready to stick the new 355 in hopefully this weekend, i have the short block together ..the machine shop did a wonderful job..main studs and new rods and bolts.... Im so jazzed
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