3/4 ton axles or not - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BUFFB · 02-25-2005, 01:34 PM

My blazer now has drums all around and I was looking to get discs in the front. I have axles from a 3/4 ton 77 chevy truck with discs in the front and 14bff in the back. My only question is can I find 8 hole 15" rims to fit my 33x12.5's. and the drums in the rear

. If so where. Thanks alot.

bouncytruck · 02-25-2005, 01:58 PM

You shouldn't have a problem finding the wheels. Just about every wheel dealer should be able to get wheels that fit. Some styles may need to be machined out to fit over the larger style hubs - but I'm not sure if that is relevant for the '77 axle. You'll probably have to move the spring perches.

Swapping disc brake setup from a '71 or '72 1/2 ton should be fairly easy too. Your '70 should have open knuckels. I think there are after market kits available too.

BUFFB · 02-25-2005, 02:04 PM

I've read that I shouldn't have to move the perches on any 3/4 ton axle from 69-78. Am I wrong.

bouncytruck · 02-25-2005, 02:48 PM

I am probably wrong. I thought that the frames on the later modeles were wider. There are a ton of K5's with 3/4 and 1 ton axels, so it is definately possible.

Scrubby · 02-25-2005, 06:16 PM

The front axle bolts right up. I have a '76 dana 44 in the front of mine.

I don't think the 14 bolt does though. I think you have to move the spring perches.

redz 1970 K5 · 02-25-2005, 06:34 PM

Go to Austink5.com - someone is making that conversion on that site on a daily basis. Also ColoradoK5.com.

BUFFB · 02-25-2005, 06:40 PM

You guys are right the front does but the 14bff doesn't, I just can't read

I just have to read more carefully thanks for the info

J.Lance · 02-25-2005, 09:13 PM

Quote:

Originally Posted by BUFFB

You guys are right the front does but the 14bff doesn't, I just can't read

I just have to read more carefully thanks for the info

If you can round up a 14 bolt out of a 1 ton, it will bolt right up, 3/4 will not. You'd just have to relocate the shock mounts. As long as your front end has the small hubs (it should), 15" wheels should go on no problem. Guys who swap in Dana 60s need to grind the caliper a bit to fit a 15" wheel. Like was mentioned before, 15" 8 lug wheels are readily available new and even came stock on some pre '71 special optioned 2wd 3/4 tons. Hard to find those though.

02-25-2005, 01:34 PM	#1
BUFFB Registered User Join Date: Feb 2005 Location: MONTANA Posts: 16	3/4 ton axles or not My blazer now has drums all around and I was looking to get discs in the front. I have axles from a 3/4 ton 77 chevy truck with discs in the front and 14bff in the back. My only question is can I find 8 hole 15" rims to fit my 33x12.5's. and the drums in the rear . If so where. Thanks alot. __________________ 1970 BLAZER STOCK 350 AND TH350 FIRST VEHICLE HAD FOR 10 YEARS STARTING REBUILD THIS YEAR

02-25-2005, 01:58 PM	#2
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	You shouldn't have a problem finding the wheels. Just about every wheel dealer should be able to get wheels that fit. Some styles may need to be machined out to fit over the larger style hubs - but I'm not sure if that is relevant for the '77 axle. You'll probably have to move the spring perches. Swapping disc brake setup from a '71 or '72 1/2 ton should be fairly easy too. Your '70 should have open knuckels. I think there are after market kits available too. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

02-25-2005, 02:04 PM	#3
BUFFB Registered User Join Date: Feb 2005 Location: MONTANA Posts: 16	I've read that I shouldn't have to move the perches on any 3/4 ton axle from 69-78. Am I wrong. __________________ 1970 BLAZER STOCK 350 AND TH350 FIRST VEHICLE HAD FOR 10 YEARS STARTING REBUILD THIS YEAR

02-25-2005, 02:48 PM	#4
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	I am probably wrong. I thought that the frames on the later modeles were wider. There are a ton of K5's with 3/4 and 1 ton axels, so it is definately possible. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

02-25-2005, 06:34 PM	#6
redz 1970 K5 OBS guy Join Date: Jun 2004 Location: SoCal Posts: 1,060	Go to Austink5.com - someone is making that conversion on that site on a daily basis. Also ColoradoK5.com. __________________ 88 Suburban Goodies- Alpine, Auto Meter, BDS, Bilstein, B&M, BFG, Borgeson, Bushwhacker, Cowl hood, Flowmaster, Genuine Gear, Holley, Infinity, JVC, K&N, MB Wheels, MSD, Pioneer, Skyjacker, Sony, Thorley, Walker + more

02-25-2005, 06:16 PM	#5
Scrubby Check out GMTrucks.org Join Date: Sep 2003 Location: Boise, Id Posts: 284	The front axle bolts right up. I have a '76 dana 44 in the front of mine. I don't think the 14 bolt does though. I think you have to move the spring perches.

02-25-2005, 06:40 PM	#7
BUFFB Registered User Join Date: Feb 2005 Location: MONTANA Posts: 16	You guys are right the front does but the 14bff doesn't, I just can't read I just have to read more carefully thanks for the info __________________ 1970 BLAZER STOCK 350 AND TH350 FIRST VEHICLE HAD FOR 10 YEARS STARTING REBUILD THIS YEAR



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