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Old 03-07-2004, 03:09 PM   #15
uwe's Avatar
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
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the 3:73's in your truck will get you home.
If you stay nearby, you won't have a lot of problems. You will be slowing down considerably on the uphills, and you will have the motor floored quite a bit while accelerating, but you will get by for a while. 4:10 gears would be my recommendation, or just get a 3/4ton with a 454 and 4:10's.
I tow a lighter trailer with a Suburban, Vortec 5.7l, 3:73 gears. It works to my satisfaction, but i don't tow at much of an altitude, either.
You will not be very happy if you try and go over 5000ft.

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Old 03-07-2004, 06:06 PM   #16
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1982 34' Limited
Tidewater , Virginia
Join Date: Dec 2002
Posts: 186
Low Power Truck; Unfortunatly

Red Lion,

The truck you mention is a good work truck but probably a weak tow vehicle as the 5.7 (350) installed has but 210hp and torque to match. Very low. I have a 454 of the same vintage an its original rating was 230hp! A bit more torque but still rather anemic. The tow on flat land would be OK in all liklehood but hills, let alone mountains would be a killer. A 4.10 rear would be better by far and replacing it would be easy with a complete salvage yard donor. Just swap axles. Quicker and cheaper. Make sure you get the correct 14 bolt rear (there are two). There should be a tag on the rear, yours too, that indicates installed ratio.

Minkus: Be careful bigger tires reduce the numeric ratio. I too have forgotten the formula but a search on Google should bring you to a tire mfg site with the info you need.

Hope this helps,

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Old 03-07-2004, 06:25 PM   #17
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Southern Middle , Tennessee
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Lets see if I learned right from Bob:

Jeanarlene asked sometime ago about tire size and how it effects power and towing. In a nut shell, a larger tire will rotate (circumference) slower than the smaller stock tire there-by effectively reducing power to the ground. Changing to a lower gear with a larger tire will bring that tire back to factory specs at a given RPM and speed. I finally found my formulas so I could share with all.

To find:
Gear Ratio= (RPM x Tire Dia.) divided by (MPH x 336);

RPM= (MPH x Gear Ratio x 336) divided by (Tire Dia.);

MPH= (RPM x Tire Dia) divided by (Gear Ratio x 336);

Tire Dia.= (MPH x Gear Ratio x 336) divided by (RPM)

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