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#1 |
Registered User
![]() Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
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rear end question
how do i identify my rear end carrier with out totally disasembeling my rear end. i have the cover off but i know there is a 3 and a 4 series carrier and i need to know if there is a simple way to identify them...
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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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#2 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
Here's the number on a series 4 carrier
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#3 |
Registered User
![]() Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
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Re: rear end question
well its hard to see the pinion but the ring gear has 41 teeth its an open diff 12 bolt short bed truck that had a 6 cyl orginal
__________________
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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#4 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
So? If it's an open carrier then it's not a series 4 posi then. The picture i posted is a series 4 posi carrier.
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#5 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
Does your glovebox have the tag on it? I found a chart that shows what the RPO codes mean.
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#6 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
I'm no expert, but just from what I know a 41 tooth ring gear is gonna be either a 3.42, a 3.73, or a 4.56
If you have a tach & it was drivable, I have a chart that can tell you what you have if you know your RPM's at 60 MPH & you need your tire height in inch's |
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#7 |
Registered User
![]() Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
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Re: rear end question
yea mine says 3866116n, i new it was not a posi i just did not know if it could be replaced with eather 3 or 4 series if i have to change all the guts or what. all i know is that i want to have a posi 3.73 witch will require a 3 series but i would settel for a 4.10 with a 4 series if it would fit. if you know much about this tell me what i need to do to get what im after...
__________________
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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#8 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
3.73 is the dividing point, series 3 goes up to 3.73, & series 4 starts from 3.73, so that may help you decide which carrier, all I know is I wouldn't take on the task of exchanging rear end gear carriers unless I really knew what i was up against, there's the shims, the backlash, making sure the teeth run in the center . I've been told it would be alot easier to find another rearend that had Posi in it, & swap the whole thing out, yours being a 67, there is the dillema of will a 70 & 1/2 to 72 rearend fit? They are a little wider, but some guys on here have done it & are still driving it, I think there is something about using later model truck calipers maybe?
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#9 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
I only know all this stuff cause I've been searching for an Eaton series 4 posi for about 6 months now, so I can tell the difference between a series 3 & a 4
here's a used sereis 4 for sale on evilbay http://cgi.ebay.com/ebaymotors/12-BO...ayphotohosting |
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#10 |
Licensed to Thrill!
Join Date: Apr 2006
Location: Northwest, GA
Posts: 1,673
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Re: rear end question
Ring Gear Teeth/Pinion Gear Teeth = Rear End Ratio (if that'll help you any).
Mine was a 3.07 (43 ring gear teeth and 14 pinion gear teeth I think) 43/14=3.07 DLB Last edited by Orange; 03-02-2007 at 05:12 PM. |
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#11 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: rear end question
Yep, & a 41 with an 11 is a 3.73 gear
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