Rear drum conversion from drum to disc
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Trailering
Joined: Mar 2026
Posts: 18
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Rear drum conversion from drum to disc
I have a 1986 f150 xl 4x4 manual with the 302 and I have been searching for a kit to convert the rear from drum to disc to save a lot of headache and modernize the truck a little bit. Can’t find anything out there for less than 800 that seems to be a reputable brand and has a parking brake. Just wondering if there are any cheaper solutions out there that are plug and play for the most part and fits in the stock 15 inch rim.
Thread Starter
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Trailering
Joined: Mar 2026
Posts: 18
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there aren’t any kits out there that are compatible with generic pads/rotors? What kind of headaches come with those non oem parts?
Lead Driver
Joined: Apr 2002
Posts: 5,317
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The point being made is that drum brakes are fine. Most of the braking power comes from the front regardless of whether it's disk or drum
Some have done the swap but many swapped the whole rear end
You will be up against many mods, E brake for starters...
Some have done the swap but many swapped the whole rear end
You will be up against many mods, E brake for starters...
Moderator
Joined: Jan 2001
Posts: 56,984
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From: Virginia
Do the kits come with modified proportioning valves or adjustable valves?
Logistics Pro
Joined: Jun 2017
Posts: 3,963
Likes: 512
From: Edmond, OK
Did the F150s come with the brake load sensing valve?
https://www.ford-trucks.com/forums/1...-lift-kit.html
That would be another hurdle to overcome if you tried to go to rear disc.
https://www.ford-trucks.com/forums/1...-lift-kit.html
That would be another hurdle to overcome if you tried to go to rear disc.
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Lead Driver
Joined: Jun 2013
Posts: 5,667
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From: Tolland, CT
Last Fall I finally got around to replacing the rusty/frozen parking brake rear cables on my 86 F150 302EFI. Easy job with parts from NAPA.
Keep it OEM style and stay happy.
Is there something wrong with your rear brakes that is causing you to want to make a expensive change ?
Keep it OEM style and stay happy.
Is there something wrong with your rear brakes that is causing you to want to make a expensive change ?
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Thread Starter
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Trailering
Joined: Mar 2026
Posts: 18
Likes: 0
Last Fall I finally got around to replacing the rusty/frozen parking brake rear cables on my 86 F150 302EFI. Easy job with parts from NAPA.
Keep it OEM style and stay happy.
Is there something wrong with your rear brakes that is causing you to want to make a expensive change ?
Keep it OEM style and stay happy.
Is there something wrong with your rear brakes that is causing you to want to make a expensive change ?
Thread Starter
|
Trailering
Joined: Mar 2026
Posts: 18
Likes: 0
ill have to check mine
Tuned
Joined: Dec 2024
Posts: 445
Likes: 94
From: Texas, near Houston
The primary issue i ran into with the drums is that our system is plumbed to actuate all 4 brakes together. My rear drums were not initially adjusted tight enough. So when i applied the brakes the fronts lagged until the pressure fed back from the rear. I had plenty of brake at the bottom of the pedal but none on top. Once i adjusted the drums out nice and tight, i had good brakes all the way thru the pedal.