Anyone know why the 72 calipers do not work on the 73?

[database00]

Anyone know why the 72 calipers do not work on the 73?
does it go the other way?
73 work on 72?

I know there is a difference between the disc brake setup for the front on a bay window just not sure what the differences are.

Thanks in advance.

[CarlosZ]

I think the '73 uses a thicker brake pad so the distance between the brake pistons is a bit longer than the '72. Not sure if it'll bolt up though.

[SGKent]

71 and 72 are one size and 73 on are another. Then in 1980 the size was the same as 73 on but the brake fluid inlet location changed.
_________________
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George Carlin:
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Skills@EuroCarsPlus:
"never time to do it right but always time to do it twice"

1971 deluxe (sold)
1977 deluxe

[pioneer1]

You need to change the spindles with the year change
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"Always waiting for tomorrow ruined everything"

'85 Porsche 911 Targa

'76 Westfalia project

[Tcash]

Brake Caliper ID T2

Disc Brake Conversions

[database00]

Thanks guys.
Does anyone know if the spindles should have a part number on them and where it would be located?

[database00]

Did i read that right if i measure the hole diamater I could also determin which one i need?
1971 Small calipers & rotors 12mm mounting bolts. Two versions, one bleeder valve early and two bleeder valves late.
1972 Small calipers & rotors 12mm mounting bolts.
1973-79 Spindles the same. Large calipers & rotors 14mm mounting bolts.

[Tcash]