Whose rear end is this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Stocker** · 07-09-2003, 09:47 PM

Now that I have your attention

, this is in my '72, and no one's ever been able to tell me what it is. I've heard Eaton, GM Corporate, and Beats Me. All I know is I have either 4:10 or 4:11 gears, and it has never broken. Except for slight pitting on the third (pocket) pinion bearing, which gave it a slight growl on deceleration. And it's an open diff.

Anyhow, I am curious as to what it is, and whether any limited-slip units are available for it (True-Trac, whatever?). Thanks - I appreciate any info.

BLAZERMAN · 07-09-2003, 10:49 PM

That's an Eaton drop out

Mike C · 07-09-2003, 10:58 PM

And there is a no-spin (detroit locker) that was optional, but you will have to get a used one.

**Stocker** · 07-10-2003, 09:01 AM

Mystery solved, thanks guys.

07-09-2003, 09:47 PM	#1
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,749	Whose rear end is this? Now that I have your attention , this is in my '72, and no one's ever been able to tell me what it is. I've heard Eaton, GM Corporate, and Beats Me. All I know is I have either 4:10 or 4:11 gears, and it has never broken. Except for slight pitting on the third (pocket) pinion bearing, which gave it a slight growl on deceleration. And it's an open diff. Anyhow, I am curious as to what it is, and whether any limited-slip units are available for it (True-Trac, whatever?). Thanks - I appreciate any info. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

07-09-2003, 10:49 PM	#2
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,829	That's an Eaton drop out __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

07-09-2003, 10:58 PM	#3
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,731	And there is a no-spin (detroit locker) that was optional, but you will have to get a used one. __________________ 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

07-10-2003, 09:01 AM	#4
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,749	Mystery solved, thanks guys. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay



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