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holden05 Offline
#1 Posted : Sunday, 18 October 2026 6:36:56 PM(UTC)
holden05

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Hi guys
Trying to work out the type of brake booster on a vc Brock. Is it a single or dual diaphragm
Smitty2 Offline
#2 Posted : Monday, 19 October 2026 1:36:26 PM(UTC)
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Originally Posted by: holden05 Go to Quoted Post
Hi guys
Trying to work out the type of brake booster on a vc Brock. Is it a single or dual diaphragm


VC Brocks used the standard GMH 4 wheel disk brake system which had tandem (dual) diaphragm booster

HTH

Club circuit racing...the best fun you can have with your pants on
holden05 Offline
#3 Posted : Thursday, 22 October 2026 3:56:54 PM(UTC)
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Copy. The brakes are doing my head in
I’ve bled what I reckon is all the air out of the master, pretty much a bottle per corner.
The pedal feel i get is good, not soft, good travel
Thinking it may of been the booster, I’ve done the test where I turn the car off, pump up the pedal till it’s firm then turn car on. Pedal sinks about 5cm
Issue I’m having is the feedback is crap, I’m having to bury the foot to stop and the brakes feel really “wooden
Is this as good as it gets or have I a problem?
Car has been in storage for a while so would it be pads?
HK1837 Offline
#4 Posted : Friday, 23 October 2026 11:59:42 AM(UTC)
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Did you remove the master cylinder? Sometimes with these the reaction pad falls off and into the booster, giving you a terrible pedal once the master is re-fitted.
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holden05 Offline
#5 Posted : Friday, 23 October 2026 12:36:14 PM(UTC)
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Yes I did to get resleeved
HK1837 Offline
#6 Posted : Friday, 23 October 2026 12:38:39 PM(UTC)
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This might be your problem. I have had this issue with a later UC in the past, same cylinder and style of booster.
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If we all had the same (good) taste, who would buy all the Fords?
 1 user thanked HK1837 for this useful post.
Smitty2 on 23/10/2026(UTC)
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