MGB-GT GT vs roadster rear brake slave cylinders

[drooartz]

It's my understanding that the GT used different slave cylinders in the back compared to the roadster. The axle I'm getting has new slave cylinders in it, but it is from a '70 roadster. Can I use the new brake bits, or do I need to swap the stuff over from my GT?

 

[Mickey Richaud]

I believe the later GT's ('68 on) used larger bore wheel cylinders, but before that they were the same as on the Tourer. Yours is a '67, so it may have the smaller ones anyway. Since you have new ones on the axle you're swapping in, you may want to try them to see how they do.

 

[drooartz]

Thanks for the top, Mickey. I just looked it up in the Moss catalog and a 67 GT (mk1) would have had the smaller bore. One less thing to have to mess with, that helps.

 

[DrEntropy]

:thumbsup:

 

[bob67bgt]

Its hard to say what has been changed on these cars over the years. The roll pin that locates the cylinder is in a different location on the small vs large bore cylinders. Just a FYI. Bob

 

[drooartz]

Thanks, Bob. I'm going to run the brakes that are on the donor axle, as they've been redone recently. Hopefully all will work out.

Out of curiosity I will check the pin locations on both axles, just to see which I have on my car.