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08-06-2007, 10:59 PM
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#1 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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What's my rearend?
Hey guys. Starting to clean up differential and working on figuring out a few things including what rear end gears the truck has. Take a look at the pics of the id markings and let me know if any of you know what it is. Thanks in advance!
    
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08-06-2007, 11:05 PM
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#2 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: What's my rearend?
Yes. It's 12 bolts. And I believe 1/2 ton. It's a `68 Chevy C10. Just curious about gear ratio.
Last edited by DoobieBrother; 08-06-2007 at 11:07 PM. |
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08-06-2007, 11:09 PM
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#3 |
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Registered User
Join Date: May 2000
Location: Storm Lake, Ia
Posts: 1,449
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Re: What's my rearend?
If you wire brush in the area pictured there should be 3 letters and some numbers. if you can give me those numbers I can tell you the ratio and year
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08-06-2007, 11:09 PM
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#4 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: What's my rearend?
Pull the cover and get the numbers off the ring gear.There is a list of numbers on it and in one area it will say 41 11,etc.Then look in the below 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 |
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08-06-2007, 11:10 PM
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#5 |
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Registered User
 
Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
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Re: What's my rearend?
looks like a stock 12 bolt judging by the cover, if you take your rear cover off on the ring gear will be stamped the ratio, if you don't know what the ring gear is its that big gear that sets in there sideways, looking strait at it when you pull the cover the ratio is stamped in the edge of it you can turn your pinion yolk by hand to rotate it around tell you see the # it should look like this 10:41 , could be diff #s but you get the idea, then all you have to do is divide the big #by the little one to get your gear ratio 41 divided by 10=4.10 gear
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The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS |
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08-06-2007, 11:11 PM
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#6 |
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Registered User
Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
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Re: What's my rearend?
69k10 musta posted a split second befor me
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The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS |
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08-06-2007, 11:11 PM
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#7 |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: What's my rearend?
best way to tell is to get the numbers off the ring gear, plus the fluid could use a change anyway im sure
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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08-06-2007, 11:15 PM
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#8 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: What's my rearend?
Fluid change and gear inspection is on the immediate plans. I just got out there tonight and started wire brushing off some surface rust. Everything that got brushed is now soaking in penetrating oil. The first of many hours in cleaning and refinishing everything chassis related. I'll go look at the axle and see what I can see. Too late too get after opening diff tonight.
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08-06-2007, 11:27 PM
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#9 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: What's my rearend?
Ok. Either I've gone blind, or there are no markings on the axle. Only the stuff I've shown above. Unless it's directly on the top of the axle. But I'm tired of messing with it tonight. Guess I have to wait till I pop it open unless anyone can figure from what I've given so far.
BTW, thanks much for the extra number info. I'll probably pop it open this weekend unless I get time before that. Last edited by DoobieBrother; 08-07-2007 at 10:23 AM. |
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08-12-2007, 12:58 AM
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#10 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: What's my rearend?
Well, got the differential fluid changed tonight. Looked over everything and it looks like I have 3.73's, which is what I was hoping. And the gears are in good shape. (I think). Here's some pics of what I found after cleaning up a bit. Let me know if you agree that everything looks fine. Cleaned it i up a bit more before I put things back together and filled up.
Also a couple of other questions:
BTW, the numbers found were... 3817778 11:41 GM 11-67 2  
Last edited by DoobieBrother; 08-12-2007 at 01:02 AM. |
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08-12-2007, 09:26 AM
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#11 |
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SWB 4X4 CLUB
Join Date: Feb 2005
Location: PA
Posts: 1,088
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Re: What's my rearend?
You have an open differiential there.
Posi and limited slip are the same thing. Jason |
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08-31-2007, 12:13 PM
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#12 |
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Registered User
Join Date: May 2006
Location: So.Cal
Posts: 542
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Re: What's my rearend?
Solver,
Can you help me out? 1970 chevy c-10 TDE 0120 Thanks, David |
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08-31-2007, 12:59 PM
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#13 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,685
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Re: What's my rearend?
Looks to be 3.73's Doobie.
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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08-31-2007, 03:56 PM
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#14 |
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Registered User
Join Date: Aug 2005
Location: Philly
Posts: 1,140
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Re: What's my rearend?
Hey Doob,
I've got a cleanup project like this one on my "to do" list. How much trouble did you have getting the diff. cover off? I'm kind of dreading that part which is why I haven't done it up until now. Ole Blue |
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08-31-2007, 04:56 PM
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#15 |
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Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: What's my rearend?
You know, I was expecting the same thing. Suprisingly, though, it came off very easy. I suspect, though that it was partially because the day before I sprayed all of the bolts really well with pentrating oil. Then when I was ready to do it, I attached one of those round wire brush type bits to my drill and worked everything over a bit. Figured it was the beginning of my efforts to remove all the surface rust junk. When I did actually put a wrench on the bolts, they came off nice and easy. Then the remaining seal shaved off with a straight edge with no problems. I used brake cleaner spray to clean it all out before going in with new synthetic.
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09-01-2007, 07:45 PM
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#16 |
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Registered User
Join Date: Aug 2005
Location: Philly
Posts: 1,140
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Re: What's my rearend?
Thanks for the info! I really ain't looking forward to messing with those bolts but I'll make sure to give them a good shot of PB the day before like you did.
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09-01-2007, 08:55 PM
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#17 | |
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Registered User
Join Date: Feb 2007
Location: chandler
Posts: 331
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Re: What's my rearend?
not related side note =P
lol. if you look at the title of this post in a different sence it sounds goofy lol
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Quote:
Last edited by combustion; 09-01-2007 at 08:55 PM. |
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