67 Camper Special C8 axle code.

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Jun 20, 2016 | 10:00 PM

46Whizzer

Thread Starter

Tuned

Joined: Dec 2014

Posts: 350

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From: North central TX

67 Camper Special C8 axle code.

From the information I have available to me, it appears that C8 means it has a locking dana 60 with 3.73 gears in the rear end.
What does it mean by "locking"? Is it a limited slip axle of some sort or something else? I've searched all over and can't find an answer, so I guess I must be missing out on a piece of very common knowledge..

Jun 21, 2016 | 02:41 AM

JEFFFAFA

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From: Phoenix, Az.

Yepper. A locking rear axle is a traction lock,limited slip, etc of sorts.

Jun 22, 2016 | 01:20 AM

RichS2659

Cargo Master

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From: North Pole, Alaska

Actually Jeff, the Dana 60 C8 axle is a Dana Trac-Loc limited slip differential using clutches. It is not a mechanical locking differential like the famous Detroit No-Spin (Tru-Trac now made by Eaton), the ARB air locker, and the Eaton E-Locker. The Loc name is just marketing hype like Ford's Traction-Lock LSD, and GM's Positraction LSD.

Jun 22, 2016 | 08:17 AM

46Whizzer

Thread Starter

Tuned

Joined: Dec 2014

Posts: 350

Likes: 44

From: North central TX

Interesting, thanks for the info guys.
I was considering buying this truck already for parts as it is pretty straight and very cheap.
A limited slip axle certainly sweetens the deal...

Jun 22, 2016 | 09:20 AM

wrhinehart

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Joined: Dec 2014

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From: Pocahontas, Iowa.

The Dana 60 "Limited Slip" rear end produces THE MOST TORQUE on the non drive wheel of ANY "Posi" rear end ever built.

It holds over 300 FT LB on the non drive wheel and was a favorite of Drag racers for years.

DO NOT use regular gear oil in that rear end.

bill

Jun 22, 2016 | 02:55 PM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

Quote:

Originally Posted by wrhinehart

Where in a Ford owners or shop manual does it say not to use 90 weight gear lube?

It doesn't.

It does say to use 4 ounces of friction modifier (D8AZ-19B546-A [replaced C1AA-19B546-A]) along with the 90 weight gear lube with Limited Slip, be it Equa-Lock or Traction Lock.

Posi or Positraction are GM terms.

As I recall, the Detroit Locker (not installed in trucks, it was a special order only in specific cars) used different fluid.

Jun 22, 2016 | 03:29 PM

JEFFFAFA

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Joined: Mar 2013

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From: Phoenix, Az.

Quote:

Originally Posted by RichS2659

True that Rich. I was generalizing though. Referencing more the "L" on a Ford rear axle tag. Like a tag saying "3L73" when it is a "L"ocking rear axle.

And Bill, you are correct. I had forgotten all about it until I read about you saying those Danas had special fluid. C6AZ popped in to my head. Looking it up I found the whole part number was C6AZ19580B. "Hypoid gear lubricant (for light trucks with Dana axles)- applicable amount of C8AZ19B546A additive to be used with complete fill. 5 gallons U.S."

Note, back a few years ago the Ford Motorsport ( now FRPP) additive part number M19546A was better acting than the Ford stuff. But about the same time Ford changed their formula (or supplier??) Motorsport changed their part number to something like M19546C12. And both were Motorcraft part number XL3.

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Jun 22, 2016 | 03:53 PM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

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From: Simi Valley, CA

Quote:

Originally Posted by JEFFFAFA

And Bill, you are correct. I had forgotten all about it until I read about you saying those Danas had special fluid. C6AZ popped in to my head. Looking it up I found the whole part number was C6AZ19580B. "Hypoid gear lubricant (for light trucks with Dana axles)- applicable amount of C8AZ19B546A additive to be used with complete fill. 5 gallons U.S."

I didn't say anything about the Dana's using special fluid. I quoted post 5 where the member said not to use regular gear lube (90W) with Dana 60's with Limited Slip.

I wonder if the member was unknowingly referring to the Detroit Locker.

When I worked the back counter, the only part number I charged out on R/O's was for the friction modifier. As I recall, mechanics used 90 weight gear lube in rear axles with/without L/S.

btw: My 1965 F100 had a Spicer/Dana 44 rear axle with Limited Slip. On the Dana L/S's of this era (at least in the F100's), there was a separate rear axle tag with an L on it.