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flex-plate/torque conv. problems

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Old Mar 7, 2020 | 01:53 PM
  #1  
jays '56 f-100's Avatar
jays '56 f-100
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From: Prescott, Arizona
flex-plate/torque conv. problems

Hey Guys, I'm swapping out my old 302 ('69) with a '91 302. I have a new 50oz flex-plate & balancer and am installing a new torque converter. The converter is a TCI "Street Rodder" and the F.P. is a PRW 1830205. Following all the instructions for clearance is where I'm having problems. The bell housing to converter pads measurement is OK at 27/32" per specs. The block to converter mounting surface only gives me 1/32" thrust/end play. Not enough, per specs. Is the offset or thickness of the flex-plate causing the problem? PRW tech support doesn't have an answer. I'm looking for some expert help here, from someone that has done this exact swap. The C-4 is an older one that has been converted to 26 spline shaft, so that hasn't changed.
Thanks, Jay :
 
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Old Mar 7, 2020 | 02:48 PM
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Hi Jay, are you using a block spacer plate that go's between the C4 & block?
 
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Old Mar 7, 2020 | 03:11 PM
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jays '56 f-100's Avatar
jays '56 f-100
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Hi and thanks for the interest. Yes I'm using the original '69 separator plate.
Jay
 
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Old Mar 7, 2020 | 03:47 PM
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how far off is it from spec? You could have a mis matched flex plate w/ the older C4 trans?
 
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Old Mar 7, 2020 | 09:45 PM
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Are you certain the torque converter is completely installed? If so, it might be worth simply trying a different brand flex plate.
 
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