Re: 700r4 or TH400 with gear splitter?
The GV will lower your rpms, but not your mileage.
Cheapest solution is new gears. If yours is like mine it probably has 4:10s in it.
I would do a 4l80 instead of the 700 if you just want to change something. Still less than the GV.
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'72 3/4 Cheyenne Super 402/TH400 Gear Vendors
'72 3/4 Cheyenne Super 350/200R4
'50 1/2 Chevy 3 Window
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