14bolt info

1171 Views 9 Replies 5 Participants Last post by 76army, Nov 28, 2005

76army

Discussion Starter · Nov 25, 2005

Quick question for you guys... I have a 14 bolt FF in my 1986 1 ton diesel... on the gear it has the GM part number then 9 41 11 85

I beleive I have 4:56 gears, which works out
41/9=4.56,
but 41/11=3.73

so what gears do I have??? And I think this is a limited slip, but I'm not sure???

[img=254x192]http://img337.imageshack.us/img337/3528/unnamed6mp.jpg[/img]

[img=254x192]http://img337.imageshack.us/img337/3143/unnamed17bb.jpg[/img]

[img=254x192]http://img337.imageshack.us/img337/5938/unnamed26jo.jpg[/img]

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I don't know about the gear serial numbers, but you should be able to mark the pinion and the ring gear, and count the number of revolutions. 3-3/4 revolutions of the pinion for one revolition of the ring gear means 3.73 gears, 4 revolutions means 4.10s, and 4.5 revolutions means 4.56s.

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Patent Pending

· #3 · Nov 25, 2005

Another really easy way to tell is to count the number of teeth on each and do some simple division. :roll:

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does it matter

· #4 · Nov 25, 2005

if i remember correctly
the 1st 2#s is the ratio, the second was the production dates.

which would make sense, since you say its a 1986 1 ton.

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K5Chris

· #5 · Nov 26, 2005

4.56 manufactured in november of 85.

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does it matter

· #6 · Nov 26, 2005

On 2005-11-25 19:06, K5Chris wrote:
4.56 manufactured in november of 85.

i sorta said that already.

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K5Chris

· #7 · Nov 26, 2005

you want a cookie?

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does it matter

· #8 · Nov 28, 2005

On 2005-11-26 14:13, K5Chris wrote:
you want a cookie?

and a Bozo button. :fu:

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black4x4

· #9 · Nov 28, 2005

I think the diff. between a open and limited diff is one has 4 holes for the cross pins this be the open one and the limited one is 3 holes.

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76army

Discussion Starter · #10 · Nov 28, 2005

Cool, thanks guys... I was really hoping for a good ratio and 456's are pretty much as good as it gets from factory

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