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04-13-2009, 10:28 AM | #1 |
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Join Date: Apr 2009
Location: Pace,Florida
Posts: 19
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Rear end question
What gear ratio would be in a 79 chevy custom deluxe? it has a 250 6 banger, turbo 350 trans and a 12bolt rearend.
I tried searching but i couldnt find anything about it. |
04-13-2009, 11:06 AM | #2 |
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Location: Bailey, NC
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Re: Rear end question
You can take the cover off, count the teeth on the ring gear and divide it by the number of teeth on the pinion. Ring gear/pinion= gear ratio. You can also raise the truck, put in neutral, mark pinion flange, mark tire, rotate tire and count number of revolutions of pinion flange. That will get you close.
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04-13-2009, 02:32 PM | #3 | |
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Location: North Coast
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Re: Rear end question
Quote:
2.56 2.76 3.40 3.73 The "Big 10" came with the 3.40 except CA where the 3.07 was standard. |
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04-13-2009, 05:46 PM | #4 |
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Join Date: Mar 2009
Location: glen burnie md
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Re: Rear end question
THANK YOU DOOLEY!!! I put a Big 10 rear end in my '85 C10. I counted the gears twice and came out to 10/34 twice (3:40). Everybody says there is only 3:43's. but NOW i'm absolved. Yes, Virginia there is a 3:40!!!!
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04-13-2009, 10:16 PM | #5 |
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Location: North Coast
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Re: Rear end question
The 3.40 axle ratio listed for some GM vehicles 1976-81 and carried a HE4 code.
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04-14-2009, 08:18 AM | #6 |
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Join Date: Apr 2009
Location: Pace,Florida
Posts: 19
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Re: Rear end question
Hmm that's interesting. Was a 12 bolt standard for 79?
The only options my truck has are power steering, power brakes and that's it haha |
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