# FACTOID: Deciphering Ring Gear Stamping information.... D60 & 14BFF

Discussion in 'The Garage' started by Greg72, Oct 16, 2003.

1. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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I'm not actually able to decipher them for you, but I can give an example of each and give you my best guesses....I will leave it to the rest of the CK5 community to "fill in the blanks" for this topic:

11 1 79 DANA D 30360 B3R33 41-10

11 1 79 = Production Date (November 1st, 1979)
41-10 = Ring Teeth vs. Pinion Teeth...in this case it's a 4.10 ratio

And now a 14BFF Rear (not from the same vehicle BTW!):

1 G1 464917 12 45 10 79
(Could also start "1 GA"...stamping is not clear)

12 45 = Pinion Teeth vs. Ring Teeth? In this case meaning 3.73?
10 79 = Date Code? October of 1979?

Those are my best guesses.... if anyone can help, I'll update this with better info.

2. ### 87BrnRsd1/2 ton status

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Yep, you got it right on the 14ff. 3.73, and it was made in October of 79'.
-Harrison

3. ### rockink51/2 ton status

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[ QUOTE ]
1 G1 464917 12 45 10 79
(Could also start "1 GA"...stamping is not clear)

[/ QUOTE ]

I think it is GM thats what mine says.

So does that mean that the last 2 sets of digits are the year?

1GM 39777333-9-41 11 73 on the ring

and..........

3977336-9-41-GM on the pinion

That would mean 4.56 GM ring gear from 11-73?

4. ### Don1/2 ton status

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30360= dana part #
b3r33= dana batch #
/forums/images/graemlins/eek.gif /forums/images/graemlins/grin.gif

5. ### 84_Chevy_K10Banned

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I would believe 41 and 9 means 4.56, yes. /forums/images/graemlins/smile.gif

6. ### jekbrownI am CK5Premium MemberGMOTM WinnerAuthor

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more info on this junk over at POR in the D60 bible... not sure about the ff14b tho...

j

7. ### scrappy881/2 ton status

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41 and 11 is 3.73.. 41 divided by 11 = 3.73

Nice to have the date code, now I know what year my 14b is from. /forums/images/graemlins/smile.gif

8. ### tRustyK5Big meanieStaff MemberSuper ModeratorGMOTM WinnerAuthor

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I have honestly never seen a 45 tooth ring gear on a 14 bolt before...

The ratio's I've seen all use a 41 tooth ring gear.

41/12...3.42:1
41/11...3.73:1
41/10...4.10:1
41/9...4.56

Greg, could you physically count the ring gear teeth on that 14?

Rene

9. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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Rene,

I didn't count the teeth, I just extrapolated what I thought must be the numbers for the "date code" and "gear ratio" based on which numbers looked plausible.....

I remember that 41 seems to be a common tooth count, but perhaps that's for the Dana 60? The 14BFF has a larger ring gear than the 60, so maybe 45 teeth is believable? /forums/images/graemlins/thinking.gif

.....like I said, I'm not the expert. But I'll bet someone here IS!

10. ### 84_Chevy_K10Banned

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[ QUOTE ]
41 and 11 is 3.73.. 41 divided by 11 = 3.73

[/ QUOTE ]

Oops I'm sorry. Its 9-41...4.56. I did the right division, just typed the numbers wrong when I posted it. Let me edit it.

11. ### tRustyK5Big meanieStaff MemberSuper ModeratorGMOTM WinnerAuthor

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Greg,

What I was trying to say was every 14 I've ever looked at had a 41 tooth ring gear. I know some Dana axles use a different tooth count on the ring gear...but 14's seem to be exclusively 41 tooth for some reason.

Is the second pic of a diff in your posession or??

I'm not saying it isn't possible, but if you think about it why would GM use a 12/45 set (3.75:1) when they already have the 11/41 set (3.73) /forums/images/graemlins/thinking.gif /forums/images/graemlins/1zhelp.gif

Rene

12. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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Rene,

No IDEAR....! /forums/images/graemlins/eek.gif

The pic is of a new van-width 14BFF I picked up on the way home from BB03.

I snapped the pic, and took my best guess about the stamping numbers and their meaning. Looks like I will have to wait for more knowledgeable folks to clear up this confusion for us... /forums/images/graemlins/thinking.gif

13. ### tarussell1/2 ton status

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Either on this board or Pirate - this 3.75 ring/pinion gear combo was discussed a few months back . It seems that GM used a stronger but noisier tooth count on some van applications. Most GM Vans that came with a FF were work vehicles and its intended useage may have demanded the stronger gear combo and the noise would not have been that noticeable in such a work orriented(sp) application.
HTH , Tom

14. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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[ QUOTE ]
Either on this board or Pirate - this 3.75 ring/pinion gear combo was discussed a few months back . It seems that GM used a stronger but noisier tooth count on some van applications. Most GM Vans that came with a FF were work vehicles and its intended useage may have demanded the stronger gear combo and the noise would not have been that noticeable in such a work orriented(sp) application.
HTH , Tom

[/ QUOTE ]

HA!

http://www.usgear.com/tl/gm3.htm

They have a chart with all the 14BFF tooth counts.....including (drumroll please) the elusive 45-12 gearset combo!!!

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