Doctor Diff Master Cylinder

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bobscuda67

bobscuda67

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I bought a Doctor Diff aluminum master cylinder some time ago and now it's getting wore out and was wondering if anyone knows of a place I could buy some new pressure seals?
I emailed Doctor Diff but got no reply and tried to start a conversion with him on here but his box is full.
Or do I just but a new master cylinder because there not rebuildable?
 
bobscuda67 said:
I bought a Doctor Diff aluminum master cylinder some time ago and now it's getting wore out and was wondering if anyone knows of a place I could buy some new pressure seals?
I emailed Doctor Diff but got no reply and tried to start a conversion with him on here but his box is full.
Or do I just but a new master cylinder because there not rebuildable?
Click to expand...



Great supplier!

I'd be very surprised if you didn't hear from him shortly.

He's a very reputable guy.
 
They are rebuildable, but in my experience it's much simpler to just buy a new one...
 
bobscuda67 said:
I bought a Doctor Diff aluminum master cylinder some time ago and now it's getting wore out and was wondering if anyone knows of a place I could buy some new pressure seals?
I emailed Doctor Diff but got no reply and tried to start a conversion with him on here but his box is full.
Or do I just but a new master cylinder because there not rebuildable?
Click to expand...
Have you tried calling him?
 
I've wondered about things like that. If he is selling these under his brand, they are most likely new and sourced from Asia. I dealt with Chinese-sourced parts in the last 15 years of my career and dealt with QC issues CONSTANTLY.

My opinion is they should last a pretty long time. I'm just spit balling here but the cylinder bores should be anodized at a minimum for wear resistance.
My old Direct Connection aluminum MC is still hanging in there. Knock on wood.
 
I took it apart and the seals look ok as far as there were no tears or cracks. But of course the outside edge of the seal is gonna have wear.
I looked down the bore and I couldn't tell if there were anodized or not.
 
Found my paper work and I bought it in June of 2014 and it has around 4500 miles on it.
I guess its just a wear item you throw away and replace.
 
Do you have an issue, or just preventive maint ?
None (?) of Toyota, Nissan, alum masters are anodized, and last for decades/mega miles .

Cass (DrDiff) asked me to email, as he was too busy for the phone .
 
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Got to text him today and he said that he didn't know of any pressure seals that fit.
Maybe try to find some that fit a Dakota but he said it might just be better to buy a new one.
So I ordered one today and I hope I get it quick.
 
inertia said:
Do you have an issue, or just preventive maint ?
None (?) of Toyota, Nissan, alum masters are anodized, and last for decades/mega miles .

Cass (DrDiff) asked me to email, as he was too busy for the phone.
Click to expand...
My pedal went to the floor when I drove for the first time this year on Tuesday.
But if I pump it five five times then I had some braking.
I could feel the drop down like when you have a blown out brake line, but there were no leaks on the ground when I pulled over and looked.
 
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