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George/Maine · 08-21-2010, 01:59 PM

I have a c4 that shifts to quick from 1 to 2nd and 3rd also.I know of 3 that do the same thing.We think its do to the vacume of the flathead maybe to low.I have a 255 8ba with c4 running gears, to equal 2000 rpms at 55 mph.Any feedback on your setup. Thanks.

08-21-2010, 01:59 PM	#1
George/Maine Senior Member Join Date: May 2010 Location: Mid coast Maine Posts: 1,878	Flathead with c4 trans shifts to quick I have a c4 that shifts to quick from 1 to 2nd and 3rd also.I know of 3 that do the same thing.We think its do to the vacume of the flathead maybe to low.I have a 255 8ba with c4 running gears, to equal 2000 rpms at 55 mph.Any feedback on your setup. Thanks.