Square body brake upgrade

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btfelker

Junior Member
Joined
Sep 5, 2026
Posts
2
Reaction score
0
Location
NC
First Name
Bobby
Truck Year
1990
Truck Model
1500 suburban
Engine Size
5.7
I love my classic Suburban but the newer autos brake systems have spoiled me. After some research I installed an OBS master cylinder and 3/4 ton rear wheel cylinders. Massive differance. However, with the master cylinder tank was to tall and hit the hood. More research lead to swaping out the tank with a 2000 S10 reservoir. Everything was a direct fit and easy upgrade for my 4,450 lb burb.
 

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
10,589
Reaction score
20,675
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
Look up the possible consequences before performing this modification. The GMT 400 uses a quick take up master cylinder designed for use with low drag calipers. Squares use conventional calipers.
 

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