The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - HELP!North TX '69 GMC rear axle swap clarification

**crossy** · 08-24-2007, 04:18 PM

I want to bring this thread back to life. found it in a search.
SO are there measurements to PROPERLY identify my 5 lug rear diff. it is Coil sp rung and in a 69 but again it is 5 lug and i'm guessing it is from a 71-72 then.
If i wanted to make it 6lug i CANNOT???? use just any year of the 67-72's , but could easily use the 73-87 4x4 6 lug axles????

yes, this is a reversal of what most want to do, but there is a method to my madness.
At least that's what i tell my shrink:-)

08-24-2007, 04:18 PM	#18
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,042	Re: HELP!North TX '69 GMC rear axle swap clarification I want to bring this thread back to life. found it in a search. SO are there measurements to PROPERLY identify my 5 lug rear diff. it is Coil sp rung and in a 69 but again it is 5 lug and i'm guessing it is from a 71-72 then. If i wanted to make it 6lug i CANNOT???? use just any year of the 67-72's , but could easily use the 73-87 4x4 6 lug axles???? yes, this is a reversal of what most want to do, but there is a method to my madness. At least that's what i tell my shrink:-) __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww 84,C10 SWB-Yella,stock 86 K10 SWB-Red, hopped up 305,4/S LOTS of Cummins trucks.