I just helped with a crazy brake redo on my buddys 1986 22R 4cyl lifted yota truck.
We went with a 1996 T100 dual booster and master cyl from a clean junkyard donor (eventually).
The reason for the brake redo was a bad original 86 single booster plus other misc. junk.
We got another bad booster from a parts truck of his.....same kind of failure mode where pedal dropped to the floor easily.
Not the hard pedal you normally get!
One big symptom was the engine dying/leaning out massively when he hit the brake pedal.
Then a bad "new" master cyl from Autozone right out of the box was next.
Total confusing suckage for a couple days. Much wasted brake fluid.
Once we got the T100 booster and matching master in there all was fixed. Nice brakes that can lock the 33" tires on pavement.
We kept the stock 86 front calipers and used Autozone 1986 4cyl replacement rear wheel cylinders (kinda gross).
He called it "Going to Toyota brake school for a week".
Anyway...
I just rebuilt the OEM Aisin rear wheel cylinders on my 1988 4Runner.
It is super easy when they are rust free and all boots are intact (New Mexico truck).
I used 1000 grit sandpaper to gently clean all internal parts and the bores, then blasted it all out with CRC LectraMotive cleaner.
Lubed all parts with thin coat of white lithium per factory service manual.
Perfect function no leaks. Autozone rear cylinders look trashy compared to the original parts on the truck.
I'd learn to rebuild the front calipers/rear cylinders on these trucks.
If somebody replaced the parts with reman parts, I'd find clean junkyard parts to rebuild.
All the reman stuff looks crappy to me. Plus reman calipers etc. are starting to get pricey.
There is video of a barefoot Aussie girl rebuilding Landcruiser 60 calipers in the dirt on YT.
If she can do it...you can too.
We went with a 1996 T100 dual booster and master cyl from a clean junkyard donor (eventually).
The reason for the brake redo was a bad original 86 single booster plus other misc. junk.
We got another bad booster from a parts truck of his.....same kind of failure mode where pedal dropped to the floor easily.
Not the hard pedal you normally get!
One big symptom was the engine dying/leaning out massively when he hit the brake pedal.
Then a bad "new" master cyl from Autozone right out of the box was next.
Total confusing suckage for a couple days. Much wasted brake fluid.
Once we got the T100 booster and matching master in there all was fixed. Nice brakes that can lock the 33" tires on pavement.
We kept the stock 86 front calipers and used Autozone 1986 4cyl replacement rear wheel cylinders (kinda gross).
He called it "Going to Toyota brake school for a week".
Anyway...
I just rebuilt the OEM Aisin rear wheel cylinders on my 1988 4Runner.
It is super easy when they are rust free and all boots are intact (New Mexico truck).
I used 1000 grit sandpaper to gently clean all internal parts and the bores, then blasted it all out with CRC LectraMotive cleaner.
Lubed all parts with thin coat of white lithium per factory service manual.
Perfect function no leaks. Autozone rear cylinders look trashy compared to the original parts on the truck.
I'd learn to rebuild the front calipers/rear cylinders on these trucks.
If somebody replaced the parts with reman parts, I'd find clean junkyard parts to rebuild.
All the reman stuff looks crappy to me. Plus reman calipers etc. are starting to get pricey.
There is video of a barefoot Aussie girl rebuilding Landcruiser 60 calipers in the dirt on YT.
If she can do it...you can too.
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