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12-03-2009, 09:44 AM
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#1
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Registered User
Join Date: Jul 2007
Location: Colorado
Posts: 1,140
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Jk Rubicon 4:10 gears vs. 1974 Chevy 4:10 gears (pics)
I just happen to have both of these sets of gears laying here so I thought I would take some pictures for you guys.
(ignore the blue towel, my workbench is black so the pics of the black gears would be harder to see).
The left is a front 4:10 from a 2008 Rubicon. The right is a 4:10 from a 1974 Chevy 3/4 truck. Both front axles.
(and the dog fur is wolf hybrid, not cracks in the gears)
Ring gear bolts.
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Cole Ford
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12-03-2009, 10:03 AM
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#2
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Web Wheeler
Join Date: Jan 2009
Location: Maine
Posts: 3,106
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Finally, something where Chrysler DIDN'T cut corners.
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12-03-2009, 10:11 AM
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#3
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Registered User
Join Date: Oct 2007
Location: Dagsboro, Delaware
Posts: 3,052
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So are the good? They look the same 
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I don't want your d**n lemons! What the hell are these?! Demand to see life's manager! Make life rue the day it thought it could give Cave Johnson lemons! Do you know who I am? I'm the man who's gonna burn your house down! WITH THE LEMONS! I'm gonna get my engineers to invent a combustible lemon that BURNS YOUR HOUSE DOWN!
Mango Tango 2010 JK Wrangler Rubicon
Silver 2000 TJ Wrangler Sport
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The 2008 Jeep Wrangler is not so much an SUV as it is an experience. It's slow and loud, handles poorly, has crummy interior materials and features doors that provide virtually no crash protection. But when it comes to off-road performance, the Wrangler is simply the best choice available.
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12-03-2009, 10:47 AM
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#4
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Make mine a Jeep!
Join Date: Jul 2007
Location: Henderson, Nevada
Posts: 9,957
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Where’s the beef? 
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12-03-2009, 11:12 AM
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#5
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Registered User
Join Date: Nov 2009
Location: Yorba Linda
Posts: 150
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Well the JK uses a "thick" designed ring gear and the old skool your showing is a reg ring gear.
to honestly put apples to apples, you should have found a "thick" d44 ring gear to put it against.
But all in all, yes the JK D44 is a bit more brawn. not significantly but some..
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12-03-2009, 11:23 AM
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#6
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Registered User
Join Date: Jul 2007
Location: Colorado
Posts: 1,140
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Quote:
Originally Posted by RWKHausSupply
to honestly put apples to apples, you should have found a "thick" d44 ring gear to put it against.
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There is no old school "thick" 4:10 
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Cole Ford
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12-03-2009, 11:27 AM
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#7
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Registered User
Join Date: Nov 2009
Location: Yorba Linda
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Quote:
Originally Posted by Xtremjeepn
There is no old school "thick" 4:10 |
Sure there is. ANY rubicon D44 TJ gear is a typ D44 RG that is "thick" and fits ANY d44 LP 3.73 and dn carrier. Hence thick 4.10 ratio RG.
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12-03-2009, 11:30 AM
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#8
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Registered User
Join Date: Jul 2007
Location: Colorado
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Quote:
Originally Posted by RWKHausSupply
Sure there is. ANY rubicon D44 TJ gear is a typ D44 RG that is "thick" and fits ANY d44 LP 3.73 and dn carrier. Hence thick 4.10 ratio RG.
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I would not consider 2003+ "old school"
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Cole Ford
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12-03-2009, 11:35 AM
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#9
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Registered User
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Location: Yorba Linda
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Quote:
Originally Posted by Xtremjeepn
I would not consider 2003+ "old school"
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Well there were a few factory's that did offer a thick D44 RG prior to 1997 for sure. It was more common to do a ring gear spacer though, back in the 80's and 90's. We sold many of them at Super Shops back then. But a few companys did offer a thick design way prior to 2003 though.
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12-03-2009, 11:45 AM
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#10
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Registered User
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Location: Colorado
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Ring gear spacers were a way to get around the carrier break for gear ratios. Use a deep carrier LSD but have a high ratio gear set. Cheaper to use a spacer.
The ring gear here is only part of the story anyway. The thickness of the pinion shaft and the size of the bearings (not pictured) is a massive difference.
Put them all toghether and you get one stout axle compared to what we used to consider "3/4 ton stuff" in an old truck.
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Cole Ford
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12-03-2009, 11:47 AM
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#11
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Registered User
Join Date: Oct 2007
Location: Michigan
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Mmmm...beefy.
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Detonator Yellow JK-X
150w windshield mount long range KC's
bumper mount Hella 500's/ 130w KC drivers
Uniden Bearcat CB/PA
Mopar bumper
Moabs/ BFG KM's
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12-03-2009, 11:50 AM
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#12
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Registered User
Join Date: Nov 2009
Location: Yorba Linda
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Quote:
Originally Posted by Xtremjeepn
Ring gear spacers were a way to get around the carrier break for gear ratios. Use a deep carrier LSD but have a high ratio gear set. Cheaper to use a spacer.
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Yep or a thick set...
Quote:
Originally Posted by Xtremjeepn
The ring gear here is only part of the story anyway. The thickness of the pinion shaft and the size of the bearings (not pictured) is a massive difference.
Put them all toghether and you get one stout axle compared to what we used to consider "3/4 ton stuff" in an old truck.
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12-03-2009, 03:12 PM
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#13
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Registered User
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Cole Ford
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12-03-2009, 08:21 PM
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#14
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Registered User
Join Date: Dec 2006
Location: Lynchburg, VA
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My question is what caused the D44 gears to be liberated from the 2008 ruby?
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2007 JK 2dr Rubicon, 3" Black Diamond Lift, 35" KM2s, M/T Classic IIs, Rancho shocks, Mopar bumpers, 8000 lb winch, Ace rock sliders, Skid Row engine/oil pan skid, evap skid, Tom Woods driveshafts, Riddler diff covers, Superlift steering stabilizer relo, rear adjustable upper control arms, chromoly rear shafts.
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12-03-2009, 08:59 PM
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#15
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Registered User
Join Date: Jul 2007
Location: Colorado
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I swapped in 5:13s
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Cole Ford
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>
Jk Rubicon 4:10 gears vs. 1974 Chevy 4:10 gears (pics)
