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Re: 1978 full-time 4x4. Is a 700r4 worth it?
Quote:
Originally Posted by Jankovic
Hello All,
I have a:
1978 Chevy
Full-time 4WD NP203
Engine 350 sb Q-Jet
th400
Front axle GM Corporate 10 bolt
Rear axle is a 14 bolt 4.10 gears
35" tires
I want to make any cost-effective changes I can for fuel mileage and DON'T want tbi or part-time 4WD. This points me to a 700r4 transmission. Problem is, based on my calculations I could get good cruising RPMs (60mph @ 2200) from 3.73 gears in my th400. This is a project truck and not drive-able yet, so I have no idea what the MPG is currently. I would be totally happy with 12-15MPG.
What would be the preferred transmission and gears?
Thanks.
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Welcome,where abouts are you?
__________________
John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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