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02-26-2006, 08:06 PM
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Flexplate questions
Hey guys I have a 76 454 that was mated to a manual in a truck. I have since placed the motor in my Camaro and am trying to mate it to an automatic. What do I need to do to pull this off? I bought a "big block" flexplate but it didn't bolt up to my torque converter so I grabbed a "small block" flexplate and it is the same dia. and bolts right up and accepts my torque converter. Sooooo is there any weight/ balancing concerns here? Am I ok in doing this? Thanks for the help. If it matters the trans is a turbo 350.
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02-26-2006, 08:11 PM
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Something doesn't sound right. When I did my 350 - 454 swap the engine was also out of a manual application. If memory serves I bought a flexplate for a 454. (I think from my local trans shop). I did not have any problems. I'm sure someone else will chime in.
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02-26-2006, 09:59 PM
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You should need the weight corrected big block flexplate with the dual converter bolt pattern. (has 6 holes for the converter) Then it will bolt right up.
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02-27-2006, 06:08 AM
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And if you have one that works and it doesn't have the 454 external balancing weight you will have major problems soon enough.
The external balancing weights are also sold seperately, I was just doing a search for something else and found some advertised for $15 somewhere on the net, these just bolt on between the crankshaft and flexplate, or the flexplate and converter, I can't remember which at the moment.
__________________
I'm actually making progress on my 1988 Suburban TH-700R4 to SM-465 transmission swap, CLICK HERE TO CHECK IT OUT. CanAm Chevelle Club 700R4 Basics 700R4 Basics W/pics ______
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02-27-2006, 09:28 AM
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OK I got one, the right one, from SFI. It has the proper bolts locations for my torque converter and it weighted for the 454. Thanks for the guidance guys.
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02-27-2006, 11:16 AM
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Glad you found success.
Mark
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02-27-2006, 12:46 PM
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Quote:
I would'nt go that far, but I have the right flexplate.  Thanks again.
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02-27-2006, 02:49 PM
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Glad you solved the problem.
For future reference, those plates that supposedly compensate for an internal-balanced flywheel to be used on an external-balanced engine are junk.
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02-27-2006, 06:04 PM
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I have heard of them allowing the flexplate bolts to come loose, and also being installed backwards, but have never seen either.
__________________
I'm actually making progress on my 1988 Suburban TH-700R4 to SM-465 transmission swap, CLICK HERE TO CHECK IT OUT. CanAm Chevelle Club 700R4 Basics 700R4 Basics W/pics ______
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