Other master cylinders in the GT?

[Wolf Spyder]

Is there any other master cylinder that will fit the GT?

[Phoenix]

Geo Master Cylinder

Since Juan's write-up, the Geo MC is rebuild and return only, just like the GT MC. They discontinued rebuild kits. I'd go with the Honda one, I doubt that they'll disco those kits.

[blancojp]

Originally Posted by Wolf Spyder Is there any other master cylinder that will fit the GT?

There are several that you can use depending on what you want and the combination you are running. You can use a BMW E30, Geo Metro, Honda Civic (non abs), pre '95 S-10 (4-wheel disk) and so on. I have posted several ways to upgrade and replace the original master cylinder with the above. In essence you can use just about any master cylinder that has a piston size of 3/4" or 13/16", that you can adapt to the brake booster.

The Geo unit is the best that I tried so far on the Opel. I use the Geo master/booster combination on most '64 through '68 Fords, when I change the brakes from drums to disk.

[opelwasp]

Originally Posted by Wolf Spyder Is there any other master cylinder that will fit the GT?

OGTS has brand new master cylinders for $99. They are larger bore so they have better pedal response. OGTS will credit you for a rebuildable core too.

[RallyBob]

Originally Posted by opelwasp OGTS has brand new master cylinders for $99. They are larger bore so they have better pedal response. OGTS will credit you for a rebuildable core too.

Yep, they should have new ones and rebuilt ones in stock. I sent them a sheetload of rebuildable cores earlier this year when I heard they had run out. You gotta love these guys for tracking stuff down and having the resources to have new stuff made.