Re: Advice Needed on Diff Re-Gear/Tranny Swap Dilemma
You could run a gear vendors overdrive unit. Cost about $3k though.
Don't remember what the gear ratio would be, but a 0.75 overdrive would drop your rpm by 550-600 at 55 mph.
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205
1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears
1996 Chevy Suburban K1500 350/4L60E
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