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Stingbird · 10-08-2018, 11:42 AM

Alright guys I have a 1970 gmc with a 454 and a TH400. which is better changing out the transmission to a 700r4 or just adding a gear vender gear splitter to the existing transmission to add the extra gears. the goal is to get better gas milage and be able to run it at higher speeds with lower rpms. what do you all think?

10-08-2018, 11:42 AM	#1
Stingbird Registered User Join Date: Apr 2015 Location: Palm Coast Florida Posts: 1	700r4 or TH400 with gear splitter? Alright guys I have a 1970 gmc with a 454 and a TH400. which is better changing out the transmission to a 700r4 or just adding a gear vender gear splitter to the existing transmission to add the extra gears. the goal is to get better gas milage and be able to run it at higher speeds with lower rpms. what do you all think?