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09-19-2013, 09:18 AM
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#1 |
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Registered User
Join Date: Mar 2013
Location: Alvarado, Texas
Posts: 148
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Front and Rear diffs on 86 K20
I am looking do do some work to the front and rear diffs and i was looking at them to try to figure out what the are. The front one had GM11 14030376 and it is a 10 bolt. The rear one has N6969 9GM 14 bolt. Does anyone know what this means on them or what they are?
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09-19-2013, 12:49 PM
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#2 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,387
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Re: Front and Rear diffs on 86 K20
The front will have 28 spline inner shafts and 30 spline outer. Not too bad of a diff if left alone for light wheeling and a tire not larger than a 33. The rear, don't know those numbers. Does it have a full floating axle assy or a semi float?
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09-19-2013, 01:08 PM
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#3 |
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Registered User
Join Date: Mar 2013
Location: Alvarado, Texas
Posts: 148
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Re: Front and Rear diffs on 86 K20
Looking at the diff cover i believe it is a semi floating. For the front diff i was wanting to replace the rotors, bearings, locking hubs and change the fluid. I was not going to make any mods to it. The rear diff complete break job, bearings and fluid change no mods. I was looking on line and there seams to be so many different diffs for these trucks. I am trying to figure out which ones i have to be able to order parts. The lock out hubs i have been seeing say for 19 spline. I havent seen any for a 30 spline. I am currently running 285/75/16 tire with a new 2 inch lift springs all the way around. Any help would be appreciated.
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09-19-2013, 02:47 PM
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#4 |
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Registered User
Join Date: Mar 2013
Location: Alvarado, Texas
Posts: 148
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Re: Front and Rear diffs on 86 K20
The truck is all original with 92500 miles on it and was just wanting to upgrade parts.
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09-19-2013, 03:17 PM
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#5 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Front and Rear diffs on 86 K20
Can you take any pics? I don't know why, but I thought the Dana 44 continued in the front for K20 models.
Full floating rear will have axles held in with bolts outside the wheel.
__________________
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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09-19-2013, 03:34 PM
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#6 |
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Registered User
Join Date: Mar 2013
Location: Alvarado, Texas
Posts: 148
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Re: Front and Rear diffs on 86 K20
i can get pics this evening when i get home from work.
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09-19-2013, 04:13 PM
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#7 |
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Registered User
Join Date: Mar 2013
Location: Alvarado, Texas
Posts: 148
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Re: Front and Rear diffs on 86 K20
I went online to WARN to see what they offered for lockout hubs and the only one they show for my truc is a 20990 and it says its for a 19 spline.
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09-19-2013, 05:03 PM
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#8 | |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,387
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Re: Front and Rear diffs on 86 K20
Quote:
The rear, if it a full floater will have the hubs sticking thru the rims, and a semi float will not........also the 14 bolt full float will have 6 bolts holding the pinion in the front of the diff |
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