Discussion in 'The Garage' started by prossett, Dec 2, 2005.
What is the stock gearing on a 1983 Jimmy GM 10-bolt?
It really depends. You can look in the glove box and get the RPO code to find out what is stock. It's always possible it could have been changed through the years if you bought it used.
there are many different gear ratios... from 3:08 up to 3:73 it seems from the factory. best thing to do is pop the diff cover and spin the tires till u see the numbers on the big ring gear. then.. use this chart and you could easily figure it out
Heres what was offered with what drivetrains . Bear in mind some strange combos can , and did , come off the assembly line . Just depends on who pushed the order through .
i had a factory v8 with 3.42 in late 70s . that chart is good idea but not exactly true. thay help but dont forget the assembly line factor.
bet 3.08 as most i have seen.
Im betting 3.08's if its a TH350. Woo-Hoo!!!
If its a 700R4 I'm guessing 3.73.
Now wheres my magic 8 ball??
FYI on the drivetrain combos: they are EPA certified and there is no way that anything other than a certified combo came off the assembly line for anything other than experimental vehicles.
That doesn't mean that printing errors were not made and you can't find service manuals or brochures that show things that weren't available, or don't show things that were produced, but the rule is, EPA certified or it didn't exist.
That is MUCH more prevalent on the later stuff because emissions controls/CAFE got extremely strict (compared to the 60's for instance) so offering huge varieties of ratios, transmission, and engines doesn't make sense from a cost standpoint on multiple fronts.
I know it's neat to think that some cooler than cool combo came off the line (454 K5 for instance) but it just couldn't happen.
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