Flexplate Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigElittleg64 · 01-29-2015, 10:28 AM

I have a 69 350 block stock crank and 92 700r4 transmission stock as well. I need new flexplate. The motor and starter come from a manual trans 4 speed with granny. What tooth 153 or 168 do i need? Will the starter still work? Internally or externally balanced? Will probably get flexplate at autozone or oreilys any help would be great thanks.

**Chevy Fleetside** · 01-29-2015, 11:02 AM

I know you can use the stater from your manual if you change the housing that bolts up to the tranny with one for an automatic. My manual started was toasted and I had a good starter for an automatic and I was albe to change the head on it and use it. The manuals bolt to the bell housing and the automatics bolt to the block. NOt sure on the flywheel.

**PGSigns** · 01-29-2015, 01:50 PM

You need an internal balanced flexplate and the tooth count can be either one. If you have the dust cover for the trans and want to use it it can be for either size. Both of my 700's have shields for 153. If you have a starter that bolted to the bell housing and plan to get a new one for the swap get one that matches the flexplate. If memory serves me your block should have three holes where the starter bolts up to use both type starter heads.(153 and 168)
Jimmy

BigElittleg64 · 01-30-2015, 02:39 PM

Ok so I have found that a FRA-100HD will work. It has 168 theeth and is the 14.13" O.D.
It should also work with my starter. Thanks for the replies. Oh yeah it is an intermnally balanced flexplate. Reason is that the inter balalnced is for two piece rear main and the external balance is for one piece rear main. Some thing to do with the material removed from the bloclk in order it make room for the one piece seal.

storm9c1 · 01-30-2015, 04:44 PM

Correct. Yep, that flexplate should work just fine. Stock flywheel on a manual truck (and stock flexplate on an auto truck) would be 168 tooth. The 153 tooth ones were mostly for passenger car applications. Don't forget to get yourself some ARP crank and converter bolts while you are ordering the parts. I'm not a big fan of reusing the stock ones.

BigElittleg64 · 01-30-2015, 05:54 PM

Will do

Wrenchbender Ret · 01-30-2015, 05:58 PM

Make shure the bolt holes to the converter line up before you put it together. If they don't you can drill new holes. Its discouraging to get it all together & find you have no holes to bolt the TQ to the FL.

cdowns · 01-30-2015, 06:13 PM

I always use loctite to keep the bolts tight for a long period of time

BigElittleg64 · 01-31-2015, 08:36 AM

I was thinking the same thing. I will let ypu know when it comes in i had to order it.

01-29-2015, 10:28 AM	#1
BigElittleg64 Registered User Join Date: Jun 2013 Location: Goddard, Kansas Posts: 44	Flexplate Question I have a 69 350 block stock crank and 92 700r4 transmission stock as well. I need new flexplate. The motor and starter come from a manual trans 4 speed with granny. What tooth 153 or 168 do i need? Will the starter still work? Internally or externally balanced? Will probably get flexplate at autozone or oreilys any help would be great thanks.

01-29-2015, 11:02 AM	#2
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,779	Re: Flexplate Question I know you can use the stater from your manual if you change the housing that bolts up to the tranny with one for an automatic. My manual started was toasted and I had a good starter for an automatic and I was albe to change the head on it and use it. The manuals bolt to the bell housing and the automatics bolt to the block. NOt sure on the flywheel. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

01-29-2015, 01:50 PM	#3
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Flexplate Question You need an internal balanced flexplate and the tooth count can be either one. If you have the dust cover for the trans and want to use it it can be for either size. Both of my 700's have shields for 153. If you have a starter that bolted to the bell housing and plan to get a new one for the swap get one that matches the flexplate. If memory serves me your block should have three holes where the starter bolts up to use both type starter heads.(153 and 168) Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

01-30-2015, 02:39 PM	#4
BigElittleg64 Registered User Join Date: Jun 2013 Location: Goddard, Kansas Posts: 44	Re: Flexplate Question Ok so I have found that a FRA-100HD will work. It has 168 theeth and is the 14.13" O.D. It should also work with my starter. Thanks for the replies. Oh yeah it is an intermnally balanced flexplate. Reason is that the inter balalnced is for two piece rear main and the external balance is for one piece rear main. Some thing to do with the material removed from the bloclk in order it make room for the one piece seal.

01-30-2015, 04:44 PM	#5
storm9c1 * That's interesting * Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,772	Re: Flexplate Question Correct. Yep, that flexplate should work just fine. Stock flywheel on a manual truck (and stock flexplate on an auto truck) would be 168 tooth. The 153 tooth ones were mostly for passenger car applications. Don't forget to get yourself some ARP crank and converter bolts while you are ordering the parts. I'm not a big fan of reusing the stock ones. __________________ Tom Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others...

01-30-2015, 05:54 PM	#6
BigElittleg64 Registered User Join Date: Jun 2013 Location: Goddard, Kansas Posts: 44	Re: Flexplate Question Will do

01-30-2015, 05:58 PM	#7
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,203	Re: Flexplate Question Make shure the bolt holes to the converter line up before you put it together. If they don't you can drill new holes. Its discouraging to get it all together & find you have no holes to bolt the TQ to the FL.

01-30-2015, 06:13 PM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Flexplate Question I always use loctite to keep the bolts tight for a long period of time __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-31-2015, 08:36 AM	#9
BigElittleg64 Registered User Join Date: Jun 2013 Location: Goddard, Kansas Posts: 44	Re: Flexplate Question I was thinking the same thing. I will let ypu know when it comes in i had to order it.



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