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#1 |
Registered User
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Location: Ephrata, WA
Posts: 308
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Axle type
How can I tell if my axle is a "3 carrier" or a "4 carrier" ?
Looking through ring and pinion sets on summit racing and jegs, I see 3:73 gear sets listed under both type 3 and type 4.
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68 C10 SSB 383 12 Charger 6.4L 12 Accord 3.5L (Wife's ride) 05 Ram 1500 5.7L My build thread - http://67-72chevytrucks.com/vboard/s...d.php?t=676545 |
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#2 | |
Registered User
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Location: Stillwater, Oklahoma
Posts: 874
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Re: Axle type
Quote:
Not the expert on this, but I believe if it's an original rear end, 3.73's and up (numerically) are a 4. They now make 3.73's that can fit either, since the most common swap is 3.08 to 3.73.
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1971 C/10 SWB, 15x8 Rallys, 4.5" X 7" static drop, C-notched, 350/350, 3.73 Posi. .........A 383 and Gear Vendors are on my bucket list. 1972 GMC 4X4 K1500 Survivor - Sold No matter what problems life throws at you, your time on Earth can be incredibly fulfilling and rewarding.....if you just lower your expectations. -Phil Dunphy |
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#3 |
Registered User
Join Date: Jul 2015
Location: Lindenwold, NJ
Posts: 94
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Re: Axle type
Here is a good link for information on carrier breaks
http://www.differentials.com/technic...carrier-breaks |
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#4 |
Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,188
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Re: Axle type
Pretty much just verify what gears your truck has now. 3.73's and lower are 4 series, 3.42's and higher are 3 series carriers. As stated, most gear sizes can be found for both carriers. Best of luck with your search!
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#5 | ||
Account Suspended
Join Date: Feb 2015
Location: So.Ca.
Posts: 264
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Re: Axle type
Quote:
Quote:
leftybass209 says 3.73's & lower are 4" Am I not seeing this right? or what? |
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#6 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Axle type
They are both saying the same thing. Factory 3.73 and lower gears (higher numerically) use the 4 series case/carrier. Where 3.42 and higher gears (lower numerically) use a 3 series case/carrier.
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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#7 |
Account Suspended
Join Date: Feb 2015
Location: So.Ca.
Posts: 264
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Re: Axle type
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#8 |
Account Suspended
Join Date: Jul 2015
Location: Traverse City MI
Posts: 147
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Re: Axle type
Confused about gear ratios? Go see these guys. That'll help!
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#9 |
Registered User
![]() Join Date: Jun 2015
Location: Ephrata, WA
Posts: 308
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Re: Axle type
I'm not entirely sure the gear ratio determines the carrier series.
For example.... This page says 3.08 to 3.90 is 3 series. and 4.10 and higher is 4 series (for cars) but says 3:42 and lower is 3 series for trucks and 3:73 and higher 4 series for trucks. http://www.jegs.com/p/Eaton/Eaton-Po...363&Ntt=750876 This says it's for GM 12 bolt truck axles and supports 3:73 but is a 4 series. http://www.summitracing.com/parts/rmg-4902801/overview/ This says it's for GM 12 bolt truck axles and supports 3:73 but is a 3 series. http://www.summitracing.com/parts/rmg-4900721/overview/ I suppose it's possible that JEGS and summitracing are wrong but...
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68 C10 SSB 383 12 Charger 6.4L 12 Accord 3.5L (Wife's ride) 05 Ram 1500 5.7L My build thread - http://67-72chevytrucks.com/vboard/s...d.php?t=676545 |
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#10 |
Account Suspended
Join Date: Feb 2015
Location: So.Ca.
Posts: 264
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Re: Axle type
MR Taiboo I thought this site/forum is for people sharing information to one another for HELPING some that need a little helping hand. I don't appreciate the hand slapping you just gave me. I didn't think any thing about your comment was of any taste at all ! ! ! mjgord51
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#11 |
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Location: Washington,Il
Posts: 632
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Re: Axle type
My $.02 cents would be spend the $20.00 for a gasket and couple of pints of gear lube to make sure what carrier you have. If the gears are factory the should have GM #'s on them. The carrier should have some casting #'s on it. Before I would order $3/4 hundred dollars of gears/bearings/seals/make sure visually what you have. Get some #'s and if you can't get the info you need on the internet or parts store. Ask the Guys on this site.MOST of them are very knowledgeable!!!
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It builds on my intelligence when I make a mistake, Boy am I building on it! '67 C-10,'70 Nova SS ![]() |
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#12 | |
Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,188
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Re: Axle type
Quote:
Don't confuse yourself or waste shipping money buying the wrong gearset. If you are certain the carrier is an OEM piece for a 67-72 carrier, the rule as stated in my first post applies. I hope that clears it up. |
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#13 | |
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Join Date: Jul 2015
Location: Traverse City MI
Posts: 147
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Re: Axle type
Quote:
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#14 |
Account Suspended
Join Date: Feb 2015
Location: So.Ca.
Posts: 264
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Re: Axle type
Thank you for a clear understanding of the differences, I also Appreciate a straight answer than a belittling picture. mjgord51
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