6-lug to 5-lug axle swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FuelCellGuy · 05-29-2005, 07:10 PM

I bought a pair of 5-lug axles from a board member that was supposed to be a direct swap with the 6-lug axles. They didn't work. The splines on the 5-lug were smaller than the 6-lug splines. Could the 5-lug be 73-up axles?? Later, FCG

Longhorn Man · 05-29-2005, 07:15 PM

That's odd. The only differance I was aware of was the length. The 73 & up ones (so I've been told) are the same as the 71/72.
I wonder if they were out of something other than a 12 bolt?

Rod · 05-29-2005, 09:27 PM

Should be 30 spline by 31 15/32 length...same axle 1971-1980 from a 12 bolt truck or 2wd blazer/ Jimmy.

**uncle** · 05-29-2005, 09:31 PM

Some early (63-64)? trucks came with coarse spline axles.

05-29-2005, 07:10 PM	#1
FuelCellGuy FUEL CELL GURU Join Date: Aug 2003 Location: Mineola, Texas Posts: 993	6-lug to 5-lug axle swap I bought a pair of 5-lug axles from a board member that was supposed to be a direct swap with the 6-lug axles. They didn't work. The splines on the 5-lug were smaller than the 6-lug splines. Could the 5-lug be 73-up axles?? Later, FCG

05-29-2005, 09:27 PM	#3
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Should be 30 spline by 31 15/32 length...same axle 1971-1980 from a 12 bolt truck or 2wd blazer/ Jimmy. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

05-29-2005, 09:31 PM	#4
uncle Senior Member Join Date: Aug 2003 Location: Conyers,Ga. Posts: 7,288	Axles Some early (63-64)? trucks came with coarse spline axles.

05-29-2005, 07:15 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	That's odd. The only differance I was aware of was the length. The 73 & up ones (so I've been told) are the same as the 71/72. I wonder if they were out of something other than a 12 bolt?



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