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02-08-2007, 05:13 PM
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#1 |
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Active Member
 
Join Date: Apr 2005
Location: Jonesborough, TN
Posts: 390
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Rearend ID help?
We have a 6 lug posi but dont know what the gears are....here are some numbers we got off of it. 3817776H? and a A217. can anybody help? it came out of a 68 burban.
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02-08-2007, 05:20 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Rearend ID help?
why not pull the cover off and count the teeth? You divide the # of drive tteth by the number of driven teeth. Anything coulda happened in the last 39 years of that suburban's life, and the one thing that DIDN'T happen nearly enough, is diff oil being chainged. It's probably 20 years overdue for one, leaving the oil only working at 50% (worst case..assuming not contaminated)
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02-08-2007, 05:31 PM
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#3 |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: Rearend ID help?
just pull the cover and count them and clean as much of the old oil as you can out of there im sure its black and stinkier than normal and put some new stuff in there and make it easier on the gears with the nice new oil
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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02-08-2007, 06:01 PM
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#4 |
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still buypickupparts
Join Date: Sep 2003
Location: charlotte
Posts: 637
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Re: Rearend ID help?
if you drain the oil and remove the back cover rotate the rear end with the cover off you would be able to see the stamed code on the gears and check the code out on a gear chart that is avaiable on the forum here, matter of fact Im pretty sure it wasif I recall Longhorn man helping me decode mine
__________________
Its Gonna be a Great Day, I woke up this Morning. 72 SWB Fleetside freshly painted. putting a 94 LT1 with 700R4 tranny lowered 4 in the front 6 in the back 81 chevy half ton 350 89 Silverado 4x4 going ta church truck |
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02-08-2007, 06:08 PM
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#5 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: Rearend ID help?
Check for the 2 sets of numbers and see what ratio they are that way.Here is a list.
Ratio 2.56:1 - Tooth Combination 41,16 Ratio 2.73:1 - Tooth Combination 41,15 Ratio 3.07:1 - Tooth Combination 43,14 Ratio 3.08:1 - Tooth Combination 40,13 Ratio 3.08:1 - Tooth Combination 37,12 Ratio 3.31:1 - Tooth Combination 43,13 Ratio 3.36:1 - Tooth Combination 37,11 Ratio 3.42:1 - Tooth Combination 41,12 Ratio 3.55:1 - Tooth Combination 39,11 Ratio 3.73:1 - Tooth Combination 41,11 Ratio 4.10:1 - Tooth Combination 41,10 Ratio 4.11:1 - Tooth Combination 37,9 Last edited by 1969k10stepside; 02-08-2007 at 06:08 PM. |
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02-08-2007, 06:22 PM
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#6 |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: Rearend ID help?
mine is a 3.07 and a when you find the numbers you can look at the chart or divide them, drive divided by driven example 43 divided by 14 = 3.07
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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