rear end question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Robznob11 · 03-29-2007, 01:01 PM

anybody ever heard of a 67-72 truck comeing from gm with a 2 series carrier in it. i thought they were all 3 and 4 series.. the gear is a 3.07 43 x 14 teeth

GREASEMONKEY72 · 03-29-2007, 03:33 PM

not sure about the carrier but mine has the 3.07 gears and its a 72

69GMCLonghorn · 03-29-2007, 04:12 PM

Go guys and your dang highways gears! I have a 69 1- ton GMC with 4:10's and apparently there is nothing higher made for it! Anything over 70 and the pistons are swappin' holes... Have a nice day!

dave2953 · 03-29-2007, 04:15 PM

I feel your pain; I have 3.73 and a powerglide

Americanrider · 03-29-2007, 09:44 PM

Try 4.56's thru a 283-420-T221.... she howls at 45+

GREASEMONKEY72 · 03-30-2007, 04:16 AM

boy 3.07s sure are nice

sorry

tphsmith · 03-30-2007, 08:04 AM

I have been having the same issues, I need 3:73 gears I bought a set. when I went to replace the set a damn the carrier it self was shot (all gaulded up from spider gears to center pin) so I bought a carrier from another source. well guess what both units together is a miss match. noone will take either one back. so i bought another ring and pinioin to match the carrier. should be here today. also the axles where the bearings ride are shot I mean shot .0025 to .003 grooves in them not a good thing for my likings so now I need new axles. the final source Im using Im alot happier with then the first source I thought would work with me. so the series 2 carrier and the series three, well I think I have pinpointedmy rearend to be a 3 series.I had 3:07 and going with 3:73s so i should go to the parts board and list my extra's lol lesson learned

OLDCHEV4X4 · 03-30-2007, 08:42 AM

My 72 blazer came with 3:07 gears...i hate em. Only reason i kept them is because the rear is a posi.

Robznob11 · 03-30-2007, 11:18 AM

well i just bought the 317 dollar jegs complete kit to make mine a 4.10 its for a 3 series carrier, i was told tat 3.07 came on 2 and 3 series carriers by jegs, im hopeing mines a 3 so i dont have to buy another, ive never heard of a truck with a 2, just wondering if any one else had

cabinetguy · 03-30-2007, 12:00 PM

Yesterday I pulled out that same gear set out of my housing that is dated 5/71 And installed a 67 posi w/ 3.73's . Must not be too rare. So I now have a 5lug 3.73 posi

Robznob11 · 03-30-2007, 03:50 PM

well i learned on thing today a 2 series carrier does not have the webbing on the top of the carrier but 3 and 4 do... thats one way to tell them apart..

tphsmith · 04-01-2007, 06:51 AM

series #4 top is alot thicker then series #3

**CUSTOM/10** · 04-01-2007, 07:27 AM

I just recieved a rolling chassis from Cali. That is supposed to have 3:07's and a posi in it !!!! I'm going to be swapping them for 3:73's. So the 3:07's and the posi will be up for sale, if anyone is interested. ( I still need to open up the rear end to confirm what's in it.) The front diff tage says 3:07's.

Gary

Moneypit · 04-01-2007, 12:25 PM

Since it seems that Rob's question has been answered hopefully I won't be lashed to death for hijacking the thread with a newbie question

What is the difference in series 2 3 and 4 rear ends and how can you tell which is which? Also, is anyone series better than another? Thanks.

**CMars45000** · 04-01-2007, 12:34 PM

The difference is in the ring gear spacing. I don't know the specific measurments but the 4 series carrier spces the ring gear closer to the pinion center line.

Robznob11 · 04-02-2007, 10:31 AM

well the 2 is light duty , 3 is med duty , and 4 is the strongest becuase of the thickness of the top as already stated.

**WorkinLonghorn** · 04-02-2007, 10:44 AM

So how does a Dana 60 stack up? As strong as a 4 series or more like a 3?

03-29-2007, 01:01 PM	#1
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	rear end question anybody ever heard of a 67-72 truck comeing from gm with a 2 series carrier in it. i thought they were all 3 and 4 series.. the gear is a 3.07 43 x 14 teeth __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

03-29-2007, 03:33 PM	#2
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: rear end question not sure about the carrier but mine has the 3.07 gears and its a 72 __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

03-29-2007, 09:44 PM	#5
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Re: rear end question Try 4.56's thru a 283-420-T221.... she howls at 45+

03-30-2007, 04:16 AM	#6
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: rear end question boy 3.07s sure are nice sorry __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

03-30-2007, 08:04 AM	#7
tphsmith still buypickupparts Join Date: Sep 2003 Location: charlotte Posts: 637	Re: rear end question I have been having the same issues, I need 3:73 gears I bought a set. when I went to replace the set a damn the carrier it self was shot (all gaulded up from spider gears to center pin) so I bought a carrier from another source. well guess what both units together is a miss match. noone will take either one back. so i bought another ring and pinioin to match the carrier. should be here today. also the axles where the bearings ride are shot I mean shot .0025 to .003 grooves in them not a good thing for my likings so now I need new axles. the final source Im using Im alot happier with then the first source I thought would work with me. so the series 2 carrier and the series three, well I think I have pinpointedmy rearend to be a 3 series.I had 3:07 and going with 3:73s so i should go to the parts board and list my extra's lol lesson learned __________________ 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 Last edited by tphsmith; 03-30-2007 at 08:05 AM.

03-29-2007, 04:12 PM	#3
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: rear end question Go guys and your dang highways gears! I have a 69 1- ton GMC with 4:10's and apparently there is nothing higher made for it! Anything over 70 and the pistons are swappin' holes... Have a nice day!

03-29-2007, 04:15 PM	#4
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: rear end question I feel your pain; I have 3.73 and a powerglide __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250

03-30-2007, 08:42 AM	#8
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Re: rear end question My 72 blazer came with 3:07 gears...i hate em. Only reason i kept them is because the rear is a posi. __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

03-30-2007, 11:18 AM	#9
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: rear end question well i just bought the 317 dollar jegs complete kit to make mine a 4.10 its for a 3 series carrier, i was told tat 3.07 came on 2 and 3 series carriers by jegs, im hopeing mines a 3 so i dont have to buy another, ive never heard of a truck with a 2, just wondering if any one else had __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

03-30-2007, 12:00 PM	#10
cabinetguy 67 shorty Join Date: Feb 2007 Location: Graham,Wa. Posts: 190	Re: rear end question Yesterday I pulled out that same gear set out of my housing that is dated 5/71 And installed a 67 posi w/ 3.73's . Must not be too rare. So I now have a 5lug 3.73 posi __________________ 67 SWB with enough parts to build two

03-30-2007, 03:50 PM	#11
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: rear end question well i learned on thing today a 2 series carrier does not have the webbing on the top of the carrier but 3 and 4 do... thats one way to tell them apart.. __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

04-01-2007, 06:51 AM	#12
tphsmith still buypickupparts Join Date: Sep 2003 Location: charlotte Posts: 637	Re: rear end question series #4 top is alot thicker then series #3 __________________ 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

04-01-2007, 07:27 AM	#13
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,806	Re: rear end question I just recieved a rolling chassis from Cali. That is supposed to have 3:07's and a posi in it !!!! I'm going to be swapping them for 3:73's. So the 3:07's and the posi will be up for sale, if anyone is interested. ( I still need to open up the rear end to confirm what's in it.) The front diff tage says 3:07's. Gary __________________ Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859

04-01-2007, 12:25 PM	#14
Moneypit Registered User Join Date: Nov 2006 Location: Alpine,Texas Posts: 129	Re: rear end question Since it seems that Rob's question has been answered hopefully I won't be lashed to death for hijacking the thread with a newbie question What is the difference in series 2 3 and 4 rear ends and how can you tell which is which? Also, is anyone series better than another? Thanks. __________________ 1968 Chevy C10 1967 Mustang 1976 Honda XL350 2006 Victory Vegas 8-Ball 2012 Ram 1500 4x4

04-01-2007, 12:34 PM	#15
CMars45000 Registered User Join Date: Jul 2006 Location: Pittsburgh, PA Posts: 204	Re: rear end question The difference is in the ring gear spacing. I don't know the specific measurments but the 4 series carrier spces the ring gear closer to the pinion center line. __________________ Project Family Values Build Thread Vehicles/Projects: -1971 C10 SWB Fleetside! Gathering parts now, will begin frame-off resto soon... Pleasure in the job puts perfection in the work. -Aristotle



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04-02-2007, 10:31 AM	#16
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: rear end question well the 2 is light duty , 3 is med duty , and 4 is the strongest becuase of the thickness of the top as already stated. __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

04-02-2007, 10:44 AM	#17
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: rear end question So how does a Dana 60 stack up? As strong as a 4 series or more like a 3? __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

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