Just picked up a '69 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

The Pawnbroker · 10-18-2008, 01:42 AM

I just picked up a 1969 K20, 4-speed. I'm completely new to old Suburban's and will have a bunch of questions. My first one is, can anyone ID my rear diff? I don't have much info right now but I thought I would throw it out and see what you guys may know. I'll get more info and pics tomorrow. For now what I can say is that it is by far the biggest rear I've ever seen in a light duty truck. It has bolts around the rear cover AND on the front of the pumpkin. This truck seems to be pretty plain Jane option wise. I can read most of the codes and descriptions inside the glove box door. It lists HD Front springs and a separate listing for HD Rear Springs in the options list. Is that just normal with the 20 series or would that have been an upgrade on top of the regular 20 series springs? There is fluid leaking sort of behind the gas pedal. Do these have mechanical oil pressure gages? Also, I don't see anywhere how the second row seats were/are bolted down in the rear. It just looks like they have front bolts and the rear supports just rest on the floor.

Thanks for any and all help in advance,

Dave.

earl87gta · 10-18-2008, 01:58 AM

That wold be an eaton rear. not sure on the springs my burb says the same thing. fluid do you have power brakes if not could it be brake fluid leaking from the back side of the mater cylinder

**68350** · 10-18-2008, 02:14 AM

i believe front hd springs gave you 3 instead of 2 leafs, and the back the same way(more leafs or heavier coil springs).

vectorit · 10-18-2008, 02:17 AM

Congratulations on joining the burb family!
Yep, that big round sexy rear end is a Corporate HO52 AKA "Eaton" most likely.
The oil you see at the gas pedal, or drippin on to you leg while driving is the mechanical oil pressure line.
the second row bench seat has rear brackets that bolt to the floor, sounds as though someone may have removed them if you are confused. The front of the seat uses a bolt and a claw type clamp for lack of better description to clamp down on the seat support.
Pictures are worth a thousand words, so get to clickin with that digi cam to show us your new burb!

The Pawnbroker · 10-18-2008, 09:05 PM

Thanks for all the info everyone. I'll update with more info as I go.

10-18-2008, 01:42 AM	#1
The Pawnbroker Registered User Join Date: Oct 2008 Location: Annapolis, MD Posts: 2	Just picked up a '69 I just picked up a 1969 K20, 4-speed. I'm completely new to old Suburban's and will have a bunch of questions. My first one is, can anyone ID my rear diff? I don't have much info right now but I thought I would throw it out and see what you guys may know. I'll get more info and pics tomorrow. For now what I can say is that it is by far the biggest rear I've ever seen in a light duty truck. It has bolts around the rear cover AND on the front of the pumpkin. This truck seems to be pretty plain Jane option wise. I can read most of the codes and descriptions inside the glove box door. It lists HD Front springs and a separate listing for HD Rear Springs in the options list. Is that just normal with the 20 series or would that have been an upgrade on top of the regular 20 series springs? There is fluid leaking sort of behind the gas pedal. Do these have mechanical oil pressure gages? Also, I don't see anywhere how the second row seats were/are bolted down in the rear. It just looks like they have front bolts and the rear supports just rest on the floor. Thanks for any and all help in advance, Dave.

10-18-2008, 01:58 AM	#2
earl87gta Senior Member Join Date: Dec 2003 Location: Kingsport TN Posts: 4,641	Re: Just picked up a '69 That wold be an eaton rear. not sure on the springs my burb says the same thing. fluid do you have power brakes if not could it be brake fluid leaking from the back side of the mater cylinder __________________ Earl 68 2500 4x4 GMC Burb

10-18-2008, 02:14 AM	#3
68350 Senior Member Join Date: Jan 2002 Location: Williston, ND Posts: 2,999	Re: Just picked up a '69 i believe front hd springs gave you 3 instead of 2 leafs, and the back the same way(more leafs or heavier coil springs). __________________ 68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi

10-18-2008, 02:17 AM	#4
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: Just picked up a '69 Congratulations on joining the burb family! Yep, that big round sexy rear end is a Corporate HO52 AKA "Eaton" most likely. The oil you see at the gas pedal, or drippin on to you leg while driving is the mechanical oil pressure line. the second row bench seat has rear brackets that bolt to the floor, sounds as though someone may have removed them if you are confused. The front of the seat uses a bolt and a claw type clamp for lack of better description to clamp down on the seat support. Pictures are worth a thousand words, so get to clickin with that digi cam to show us your new burb! __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

10-18-2008, 09:05 PM	#5
The Pawnbroker Registered User Join Date: Oct 2008 Location: Annapolis, MD Posts: 2	Re: Just picked up a '69 Thanks for all the info everyone. I'll update with more info as I go.



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