Re: RPO code GQ1
3.08's are the most common half ton ratio, all thruout the 70'sm 80's, and even 90's. My 87 6.2 700R4 has them, as well as my 84 250 TH350 and my 83 305 TH350.
BUT the original post said that it was a 14b SF, which would be the 9.5" ring gear, which would be a light 3/4 ton. The only gearsets available for that rear are the 3.23, 3.42, 3.73, 4.11, and 4.56. The 3.42 is by far the most common original gear, followed by the 4.11 (usually a towing package) and 3.73 (usualy a camper package or HD GVW) I've never seen a 4.56 factory in person, usually by time that much torque is needed they would step up to the 10.5" or the Dana. The 3.23 would seem to be a highway gear with 16" rims and factory tires. The only one I've seen was a 4wd, a light 3/4 ton pickup. It's interesting to note that this is the only ratio not available aftermarket - must not have made many.
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1987 2 ton
1982 250/TH350 beater in progress
Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping
Plus a mess o' tractors
Last edited by D13; 01-30-2010 at 09:35 AM.
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