?'s about 79 front end. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mark540 · 03-14-2003, 02:11 PM

Are the brakes, ie knuckles out the same on a 79 as a 70 with drum brakes? I can get a 79, but it has a different ratio than the one I would replace it with. Trying to see if I could use the knucles out for the swap.

Thanks

Mark

ljbear · 03-16-2003, 01:11 PM

There are a few differences on the front ends, but most of the parts will interchange. The 79 should have disc brakes, the larger axles and spindles. The knuckles will interchange without a problem. To change axles, spindles, and swap to the disc brakes should not be a problem.

Larry

Blazer1970 · 03-17-2003, 09:23 AM

The '79 will most likely be a 10 bolt, although it could still be a Dana 44. The '70 axle will have the smaller 260-X steering u-joints, which means that if you want to swap to the bigger joints, you would have to swap the inner shafts also. The inner shafts from a 10 bolt are 28 spline, and they will not swap with the 30 spline Dana 44 shafts. If you just swap the spindles, hubs, rotors, brake backing plates, calipers, and lockouts, and leave the shafts alone, everything should work.

ljbear · 03-17-2003, 09:33 AM

Tim is correct on the axle spline differences. I should have noted that both need to be 44's to swap the parts. I assumed (a bad thing to do) we were talking about two 44's here.

Larry

Mark540 · 03-17-2003, 10:14 AM

Thanks for your help guys, I think I will try and find a 73 thru 78 Dana 44 for the swap.

03-14-2003, 02:11 PM	#1
Mark540 Registered User Join Date: Feb 2003 Location: Fairborn,OH Posts: 203	?'s about 79 front end. Are the brakes, ie knuckles out the same on a 79 as a 70 with drum brakes? I can get a 79, but it has a different ratio than the one I would replace it with. Trying to see if I could use the knucles out for the swap. Thanks Mark __________________ 1970 GMC Burb 4x4 - 68 Chevy Front, FI LT1, 4L60E 1970 Chevy Impala 47,000 miles 2001 BMW 540i 6-speed 2002 Dodge Ram 1500 4x4 w/20's

03-16-2003, 01:11 PM	#2
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	There are a few differences on the front ends, but most of the parts will interchange. The 79 should have disc brakes, the larger axles and spindles. The knuckles will interchange without a problem. To change axles, spindles, and swap to the disc brakes should not be a problem. Larry __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

03-17-2003, 09:23 AM	#3
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	The '79 will most likely be a 10 bolt, although it could still be a Dana 44. The '70 axle will have the smaller 260-X steering u-joints, which means that if you want to swap to the bigger joints, you would have to swap the inner shafts also. The inner shafts from a 10 bolt are 28 spline, and they will not swap with the 30 spline Dana 44 shafts. If you just swap the spindles, hubs, rotors, brake backing plates, calipers, and lockouts, and leave the shafts alone, everything should work. __________________ Tim

03-17-2003, 09:33 AM	#4
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	Tim is correct on the axle spline differences. I should have noted that both need to be 44's to swap the parts. I assumed (a bad thing to do) we were talking about two 44's here. Larry __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

03-17-2003, 10:14 AM	#5
Mark540 Registered User Join Date: Feb 2003 Location: Fairborn,OH Posts: 203	Thanks for your help guys, I think I will try and find a 73 thru 78 Dana 44 for the swap. __________________ 1970 GMC Burb 4x4 - 68 Chevy Front, FI LT1, 4L60E 1970 Chevy Impala 47,000 miles 2001 BMW 540i 6-speed 2002 Dodge Ram 1500 4x4 w/20's



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