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02-28-2016, 03:28 PM
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#1 |
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Registered User
Join Date: Feb 2016
Location: Louisiana
Posts: 92
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14 bolt dually diff ,04 has no front pinion bearing
I assumed all Corp 14 ff had the "pilot" bearing on the front of the pinion gear however I just looked at one 15 mins ago that did not. Do some not have that or there different ff 14 bolt difs?
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02-28-2016, 03:31 PM
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#2 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 14 bolt dually diff ,04 has no front pinion bearing
I don't think the 9 /2" gear did. All the 10 1/2" geared units I've taken apart have had the pilot.
__________________
My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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02-28-2016, 03:35 PM
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#3 |
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Registered User
Join Date: Feb 2016
Location: Louisiana
Posts: 92
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Re: 14 bolt dually diff ,04 has no front pinion bearing
This is a 1 ton dually 04 it should have it,it has a huge ring gear in it. It even has the disc brakes and ff axles... I don't understand this mystery
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02-28-2016, 04:37 PM
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#4 |
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All about them K’s
 
Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,505
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Re: 14 bolt dually diff ,04 has no front pinion bearing
Negatory. The newer 14 bolts went to an 11.5 gear and lost the pinion support bearing. (I assume the pinion support is what your talking about. They changed somewhere around 01. The strength between the 10.5 and 11.5 14 bolts is supposed be about the same.
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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02-28-2016, 05:07 PM
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#5 |
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Registered User
Join Date: Feb 2016
Location: Louisiana
Posts: 92
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Re: 14 bolt dually diff ,04 has no front pinion bearing
I just got a AAM 11.5 for 200.00 out of an 04 60k miles!
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02-28-2016, 09:13 PM
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#6 | |
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Registered User
Join Date: Feb 2016
Location: Louisiana
Posts: 92
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Re: 14 bolt dually diff ,04 has no front pinion bearing
Quote:
So I guess this will work well for my dually conversion. 
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02-29-2016, 09:44 AM
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#7 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
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Re: 14 bolt dually diff ,04 has no front pinion bearing
You've gotten good info from the other guys. The 11.5 Aam axle does not have the bolt on pinion support as you have seen. It is not a FF 14 with the 10.5" ring gear and removeable pinion support.
More info on dually rears: Most square body dually' swerve Dana 70 HD. The cab and chassis trucks usually had the FF 14 as the installed diff. I have both an 86 K30 with the 70HD and an 85 CnC with the FF 14. It's amazing how much wider the 70 is as well.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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02-29-2016, 10:12 AM
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#8 | |
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Registered User
Join Date: Feb 2016
Location: Louisiana
Posts: 92
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Re: 14 bolt dually diff ,04 has no front pinion bearing
Quote:
Yea the original one I bought to replace the dana 60 is a 70 hd and its like 76' WMS so I'm stuck with a extra dif atm, the AAM is much shorter I think we measured 68 ish so that tucks the outer dually wheel in better. I read the AAM is stronger than even a 80 however we all know people argue over whats better than what. I will say I can beat the disc brakes,11.5 gear,373's and shorter WMS it seems a better dif for my project anyway. |
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