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Gear ratio question.
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Willowlp
New User
| Posts: 5
| Joined: 05/09
Posted: 05/22/09
10:49 PM
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Hi guys new here and had a question about gear ratios. Well Im trying to replace the 14 bolt rear diff on my 77 k20 I bought the replacement and i have no idea if they both have the same ratio I tried to post pics but could not do it so here are what the rings say up along the side.
2 GM3977334 10 41 1 72
1 GM3992484 11 41 10 76
Appreciate any help thanks.
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RCG
User
| Posts: 66
| Joined: 03/09
Posted: 05/23/09
10:42 PM
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i think you have 4:10's. i now have 4:88's but tomorrow, i will look at the numbers on my old 3:73's and compare notes. i divided the numbers on mine and it came out to 3:73. thats how i new. otherwise, count the teeth on your ring and your pinion and divide them. that should tell you what you need to know.
?
Strength before Comfort..
1991 V2500 Suburban 4x4 5.7 14 bolt 4" up 35" BFGs 4:88's manual lock
Built 'OldSchool Chevy Tuff!!'
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Willowlp
New User
| Posts: 5
| Joined: 05/09
Posted: 05/23/09
11:22 PM
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Cool thanks for the help, I counted both rings and they both have the same # of teeth but I couldnt count the pinion cause I would have to move the other stuff just to get to it so am I cool as far as same ratio?
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