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Old 08-16-2001, 08:40 PM   #1 (permalink)
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Post Rear Disk brakes for 1994 K Blazer?

Does anyone know of an inexpensive way to convert the rear ABS drums to rear disks while keeping the ABS and E brake functioning? I had thought of doing this on my 1994 K Blazer. Would the newer (2000) rear disk brakes bolt on as a complete set? Maybe the whole rear end with MC and proportioning valve would need to be swapped in? I had done this easy enough to the rear D60 in my Jeep, now I want to help out my Blazer.
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Old 08-17-2001, 03:19 AM   #2 (permalink)
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The 99-up rear ends aren't a direct bolt-in. A 94 K-Blazer does not have wheel sensors, so swap away <IMG SRC="smilies/smile.gif" border="0">

Use a front rotor, along with the Cadillac calipers, and 71-87 K10 caliper brackets. Perhaps use an ABS unit & prop valve from a 3500HD (these have 4-wheel disc).

You could also experiment with mounting just the disc hardware from a 99-up Silverado on your read end.

This 68 Camaro 12-bolt has 98-up S10 rear disc hardware mounted on it. The square flanges on the sxle tube needed to be removed an re-welded about 1" inboard.

more pics

Here's the Silverado hardware you would be dealing with if you chose that route:

More pics

[ 08-17-2001: Message edited by: u2slow ]
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Old 08-17-2001, 06:13 AM   #3 (permalink)
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Thanks! BTW where are the wheel sensors, in the diff? I have never really looked ...yet! I would consider the 81-87 K10 caliper mounting brackets, front rotors, and the Cadillac calipers, and a prop valve from a 3500HD. This is exactly what I have done with my D60 rear except I used the 3/4T parts and the Caddy caliper. Would the 1979 Pontiac TransAm rear caliper fit the K10 brackets? Thanks again
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Old 08-17-2001, 11:23 AM   #4 (permalink)
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Quote:
Originally posted by cj8scrambld:
<STRONG>BTW where are the wheel sensors, in the diff? </STRONG>

There aren't any. They use the speed sensor in the tranny to measure rear wheel speed. Each front wheel usually has a sensor.

I don't know what size the Trans-Am rear calipers are. I know the front brakes are smaller than the Caddy, so perhaps the rear is too - I really don't know <IMG SRC="smilies/confused.gif" border="0">

[ 08-17-2001: Message edited by: u2slow ]
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Old 08-17-2001, 07:54 PM   #5 (permalink)
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Oh yeah, quick ?. What do the rotors mount to? The axle flange? I had seen a post (here I think) of someone doing a rear disk swap a a Scout D44. I can't find it now? I think they had flipped the rotor and mounted from the back of the axle flange, I think? What are the rest of the details? This sounds like it might be easy enough to do once I get it str8 in my head. Thanks.
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Old 08-18-2001, 10:37 PM   #6 (permalink)
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if you're using rotors off a solid-axle rig - like a Dana 44, only the front side of the rotor is machined, requiring you to mount them on the backside of the axle flange.

The rotors on GM IFS 4x4s mount on the outside of the hub - so you can do the same treatment when you put them on the rear.
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Old 08-20-2001, 03:48 PM   #7 (permalink)
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u2slow,
So let's see here...parts list? IFS front rotors, Caddy rear calipers, 71-87 caliper brackets. Rotors mounted on the over the wheel studs as in the IFS? Fab the brackets to bolt to the axle housing? Then maybe use an adjustable (like a Wilwood) proportioning valve on the rear line or would a 4wh dick master cyl. be better? Plus , yes, all the small parts like hoses and etc. Is there anything else that I am missing? Sorry, if this needs to be spelled out for me, I would want to get everything in one shot
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Old 08-20-2001, 04:25 PM   #8 (permalink)
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I would go with the adjustable proportioning valve or one from a 3500HD. I don't know off hand if a 99-up Silverado master fits your 94.

Otherwise your parts list looks complete.
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Old 08-20-2001, 05:39 PM   #9 (permalink)
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u2slow,
Thanks for all your info. I will give it a shot as it is almost as I have done with my FF D60 which turned out easy and very effective. Thanks again for your help, it is much appreciated. John
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