Leaf Spring Differential to Coil Spring Truck? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**DANTIP** · 07-06-2011, 11:26 AM

I am looking for a 3.08 posi for my 72 1/2 ton, and someone on the board has a 3.08 5-lug posi differential for a leaf spring truck. I'm just assuming the spring attachment parts that are welded to the housing are different.

Has anyone changed the spring attachment parts from leaf to coil? Was it pretty straight forward? Was it worth doing? My alternative is buying a new Eaton posi and 3.08 gears and have them installed (or possibly follow well written instructions).

Any other thoughts? I also assume if I just exchange the carrier and gears that the set-up would need to be verified by a skilled differential mechanic. I was also told most mechanics don't recommend re-using gears.

gcburdic · 07-06-2011, 10:09 PM

Hey Dan...

Did a quick search....check out post #10 here http://67-72chevytrucks.com/vboard/s...d.php?t=346340
and post #3 here...http://67-72chevytrucks.com/vboard/s...d.php?t=278866

hope these help

Hubscrub · 07-06-2011, 10:33 PM

Someone did my wife's 67 that way

you can see where i believe the old springs perches were cut off in one of the pics and they made there own panhard bar and mount on the rear end

I plan to install a super trac bar from ece and all should be well and just clean up some of the old and new welds.

07-06-2011, 10:09 PM	#2
gcburdic Restoration Virgin! Join Date: Jan 2008 Location: Huntersville, NC Posts: 8,298	Re: Leaf Spring Differential to Coil Spring Truck? Hey Dan... Did a quick search....check out post #10 here http://67-72chevytrucks.com/vboard/s...d.php?t=346340 and post #3 here...http://67-72chevytrucks.com/vboard/s...d.php?t=278866 hope these help __________________ Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present

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07-06-2011, 11:26 AM	#1
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,888	Leaf Spring Differential to Coil Spring Truck? I am looking for a 3.08 posi for my 72 1/2 ton, and someone on the board has a 3.08 5-lug posi differential for a leaf spring truck. I'm just assuming the spring attachment parts that are welded to the housing are different. Has anyone changed the spring attachment parts from leaf to coil? Was it pretty straight forward? Was it worth doing? My alternative is buying a new Eaton posi and 3.08 gears and have them installed (or possibly follow well written instructions). Any other thoughts? I also assume if I just exchange the carrier and gears that the set-up would need to be verified by a skilled differential mechanic. I was also told most mechanics don't recommend re-using gears.

07-06-2011, 10:33 PM	#3
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: Leaf Spring Differential to Coil Spring Truck? Someone did my wife's 67 that way you can see where i believe the old springs perches were cut off in one of the pics and they made there own panhard bar and mount on the rear end I plan to install a super trac bar from ece and all should be well and just clean up some of the old and new welds. Attached Images __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14



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