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post #1 of (permalink) Old 06-24-2001, 04:06 AM
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gears

i have an 84 chevy k10 that i just finished puttin a lift and 33 mud kings on . I currently have 3.08 gears in the diffs. but would like to have more power to the ground , would 4.56 be a good choice to the keep the motor in its rpm range? i do have an overdrive transmission

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post #2 of (permalink) Old 06-24-2001, 04:11 AM
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Re: gears

4.56 is too low, even with od. I am at work so I dont have links but there are plenty of gear calculators out there that show the range of gearing for tire size. Check on this site too. Look for one with colors, Red yellow green. It seems to be the best and doesn't need any input. To bad you didn't have 3.73 stock youd be beter off.

post #3 of (permalink) Old 06-24-2001, 04:26 AM
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Re: gears

im going to be putting in a built 350 also, so i really need to know what ratio i need to have in the diffs. as soon as possible because my truck is going in the shop to have the gears installed next week. WHat are the side effects of the gears being to low?

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post #4 of (permalink) Old 06-24-2001, 05:01 AM
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Re: gears

3.73 or 4.10's would be fine. Depending on if you wanted power or good mileage, either would work. I would go with 4.10's so that if I ever put on a taller tire the rpm's wouldn't be as bad.

1992 Blazer Sport, 350, 4L60, Rancho 2" lift, 285/75R16 AT's, K&N, Flowmaster, MSD stuff[img]/wwwthreads_images/icons/laugh.gif[/img]
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post #5 of (permalink) Old 06-24-2001, 02:21 PM
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Re: gears

Check this chart out: http://www.4lo.com/geartable.html

post #6 of (permalink) Old 06-24-2001, 02:25 PM
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Re: gears

if you are putting in a built 350 then go w/ the 4.10s. you would have plenty of power to spin even 35s like crazy if you wanted.

92 FullSize Blazer Sport, 3", 285/75 Yok. MT, x8000i, 4.10s
65 CJ5 302 Ford, 4.5", 34/9.50 TSL, Warn OD, 4.27s
79 Scout 6" 33 TSLs Welded Diffs
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post #7 of (permalink) Old 06-24-2001, 04:04 PM
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Re: gears

If you plan to stay with 33's I would think 3.73 gearing would be about right. I have an 84 with 350, SM465, NP208, 35's and 4.10 gearing. I have plenty of power and still get resonable gas mileage. If you go with 4.10's then you will be a little low now but when and if you decided to go with bigger tires you would be in good shape.

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