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Old 05-09-2010, 08:41 PM   #1
my69camaro1
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1981 GMC 454ci flexplate tooth count?

Bone stock 81 GMC 2wd dually with a 454 and th400... Truck has headers and the stock starter is having trouble when warm. I have a powermaster mini starter but I don't want to put it on in case the tooth count is wrong on the flexplate..
Anyone know off the top of their head what it should be?
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Old 05-09-2010, 08:42 PM   #2
b454rat
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Re: 1981 GMC 454ci flexplate tooth count?

168.
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Old 05-09-2010, 09:04 PM   #3
my69camaro1
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Re: 1981 GMC 454ci flexplate tooth count?

Cool Thanks
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Old 05-10-2010, 12:15 AM   #4
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Re: 1981 GMC 454ci flexplate tooth count?

HMMM, I think BB used 152.
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Old 05-10-2010, 12:19 AM   #5
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Re: 1981 GMC 454ci flexplate tooth count?

Chevy used 153 and 168... not 152
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Old 05-10-2010, 01:37 AM   #6
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Re: 1981 GMC 454ci flexplate tooth count?

Okay, 153!
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Old 05-10-2010, 08:03 AM   #7
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Re: 1981 GMC 454ci flexplate tooth count?

And not on a big block, 153 was on Camaro's and Caprice's IIRC, but small block only.
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Old 05-10-2010, 12:47 PM   #8
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Re: 1981 GMC 454ci flexplate tooth count?

High compression engines use 153 tooth plates. My ZZ4 comes from the factory with a 153. I had to buy a BB starter to keep it.
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Old 05-10-2010, 06:19 PM   #9
my69camaro1
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Re: 1981 GMC 454ci flexplate tooth count?

Well the starter I have is for 168s so I hope thats what is is. haha
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