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GRADYS Performance · 07-09-2019, 01:24 PM

You will love the 4L80E. It cuts the RPM in overdrive by 25% plus the rpm drop from converter lockup. Mileage will go up accordingly.

07-09-2019, 01:24 PM	#2
GRADYS Performance Registered User Join Date: Dec 2013 Location: Columbus, Oh Posts: 366	Re: 1972 K20: TH350 or 4L80? You will love the 4L80E. It cuts the RPM in overdrive by 25% plus the rpm drop from converter lockup. Mileage will go up accordingly.