harmonic balancer change? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nac593 · 11-05-2007, 11:11 PM

I'm switching from manual trans to automatic. Can I still use the same harmonic balancer or does it require a different one? Thanks

*Billla* · 11-05-2007, 11:14 PM

The only time a balancer change is required is when you change the balance

Seriously, not required as long as you match the flywheel to the flexplate - i.e. if the flywheel was external balance then the flexplate must be as well.

nac593 · 11-05-2007, 11:33 PM

I'm not sure I understand. Does that just mean I have to have the same number of teeth on both?

Jtrux · 11-05-2007, 11:45 PM

No, engines are balanced, either externally or internally. Look on your flywheel, if it has a weight on it, then it's external if not then it's internal. Your new flexplate also needs to match your old flywhell in balance and teeth (unless you want to buy a different starter).

nac593 · 11-05-2007, 11:51 PM

Thanks for the help.

70GMCer · 11-06-2007, 07:15 AM

Unless you have a 400 sbc or a 383 stroker, you will just use the regular flexplate. As said above, just make sure you have the same tooth count as your flywheel has.

11-05-2007, 11:11 PM	#1
nac593 Registered User Join Date: Sep 2007 Location: san diego,ca Posts: 125	harmonic balancer change? I'm switching from manual trans to automatic. Can I still use the same harmonic balancer or does it require a different one? Thanks

11-05-2007, 11:14 PM	#2
Billla Account Suspended Join Date: Sep 2005 Location: Monroe, WA Posts: 3,815	Re: harmonic balancer change? The only time a balancer change is required is when you change the balance Seriously, not required as long as you match the flywheel to the flexplate - i.e. if the flywheel was external balance then the flexplate must be as well.

11-05-2007, 11:33 PM	#3
nac593 Registered User Join Date: Sep 2007 Location: san diego,ca Posts: 125	Re: harmonic balancer change? I'm not sure I understand. Does that just mean I have to have the same number of teeth on both?

11-05-2007, 11:45 PM	#4
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: harmonic balancer change? No, engines are balanced, either externally or internally. Look on your flywheel, if it has a weight on it, then it's external if not then it's internal. Your new flexplate also needs to match your old flywhell in balance and teeth (unless you want to buy a different starter). __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

11-05-2007, 11:51 PM	#5
nac593 Registered User Join Date: Sep 2007 Location: san diego,ca Posts: 125	Re: harmonic balancer change? Thanks for the help.

11-06-2007, 07:15 AM	#6
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: harmonic balancer change? Unless you have a 400 sbc or a 383 stroker, you will just use the regular flexplate. As said above, just make sure you have the same tooth count as your flywheel has. __________________ 1997 GMC Sierra Ext 1965 Mustang



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