spider or side gear swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldsnakebite · 11-06-2012, 04:16 PM

Here's a strange one! are the side gears on my 64 12 bolt 3.73 rear end the same as in a 1969 12 bolt 3.08 rear end? I know the 64 is 17 spline and the 69 in 30 spline, but are the teeth the same. The reason I ask, I plan to install the 69 rearend 3.08 in my 64 truck, but my 64 rear end already has redrilled axles and the 69 have 6 lug axles. If the side gears would swap out, all I do is swap the side gears and axles to the 69 and I'm ready to go! Maybe? Or if not, redrill the 6 lug axles to 5 lug, but have not found anyone that can do it. Or just buy new 5 lug axles at $125 each. Thanks Marty

sigshooter · 11-06-2012, 11:04 PM

Yes they are the same except the 17 spline part.... I have changed them out several times

oldsnakebite · 11-06-2012, 11:36 PM

Thanks Sigshooter, I will give it a shot. Marty

oldsnakebite · 11-13-2012, 04:10 PM

Seems the side gears will swap from a 69 model to a 64 12 bolt easily. I needed the redrilled five lug axles from my 64 3.73 rearend to fit into a 69 model 3.08 rearend. Both the same width, but the difference being the number of splines on the axles. So I changes the side gears and it worked great. Thanks Guys

11-06-2012, 04:16 PM	#1
oldsnakebite Registered User Join Date: Apr 2012 Location: Rockwall Texas Posts: 38	spider or side gear swap Here's a strange one! are the side gears on my 64 12 bolt 3.73 rear end the same as in a 1969 12 bolt 3.08 rear end? I know the 64 is 17 spline and the 69 in 30 spline, but are the teeth the same. The reason I ask, I plan to install the 69 rearend 3.08 in my 64 truck, but my 64 rear end already has redrilled axles and the 69 have 6 lug axles. If the side gears would swap out, all I do is swap the side gears and axles to the 69 and I'm ready to go! Maybe? Or if not, redrill the 6 lug axles to 5 lug, but have not found anyone that can do it. Or just buy new 5 lug axles at $125 each. Thanks Marty __________________ I have not failed. I’ve just found 10,000 ways that won’t work. Last edited by oldsnakebite; 11-06-2012 at 04:22 PM.

11-06-2012, 11:04 PM	#2
sigshooter Registered User Join Date: Aug 2011 Location: Tahlequah, Ok Posts: 1,235	Re: spider or side gear swap Yes they are the same except the 17 spline part.... I have changed them out several times __________________ 1965 long bed ( grandpas old truck ) 1964 long bed BBW Custom Cab 1966 Short stepside 1964 long bed 1965 long bed Custom Cab, factory air, V-8, powerglide

11-06-2012, 11:36 PM	#3
oldsnakebite Registered User Join Date: Apr 2012 Location: Rockwall Texas Posts: 38	Re: spider or side gear swap Thanks Sigshooter, I will give it a shot. Marty __________________ I have not failed. I’ve just found 10,000 ways that won’t work.

11-13-2012, 04:10 PM	#4
oldsnakebite Registered User Join Date: Apr 2012 Location: Rockwall Texas Posts: 38	Re: spider or side gear swap Seems the side gears will swap from a 69 model to a 64 12 bolt easily. I needed the redrilled five lug axles from my 64 3.73 rearend to fit into a 69 model 3.08 rearend. Both the same width, but the difference being the number of splines on the axles. So I changes the side gears and it worked great. Thanks Guys __________________ I have not failed. I’ve just found 10,000 ways that won’t work.



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