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bigmoe · 04-03-2021, 06:12 PM

I did some searching around and the Eaton application chart says the Truetrac is only available for the 12 bolt for 3.73 and up ratios (I'm 3.42). However their Eaton Posi IS available though for 2.76 - 3.42 ratios. The Eaton Posi evidently is the real deal, actually used by GM factory muscle cars in the past. Not sure about installation difficulty though.

I also found the Powertrax 9207883005. They call it a "drop in" locker with "easy diy" and doesn't effect ring and pinion settings.

04-03-2021, 06:12 PM	#3
bigmoe Registered User Join Date: Oct 2014 Location: Brandon, Manitoba, Canada Posts: 956	Re: Options for posi? I did some searching around and the Eaton application chart says the Truetrac is only available for the 12 bolt for 3.73 and up ratios (I'm 3.42). However their Eaton Posi IS available though for 2.76 - 3.42 ratios. The Eaton Posi evidently is the real deal, actually used by GM factory muscle cars in the past. Not sure about installation difficulty though. I also found the Powertrax 9207883005. They call it a "drop in" locker with "easy diy" and doesn't effect ring and pinion settings.