Brake calipers and axles...

[Maverik]

I have a "older" style narrow radius arm front axel, and I want to get a new set of calipers. there are heaps on fleebay.

Now a question; are all front calipers interchangable with the verious models of disc front axels? i.e. can i put some TD5 vented calipers on a 1984yr front disc axel?

I know you have to match vented type to vented discs, but is there a difference in the foundation points?

And is there a difference between 90 calipers and 110 calipers??

Cheers

Mav

[jbs]

There is a difference between the two types of calipers ie: 90 and 110 however I have a 90 but I have 110 vented calipers on the front of my truck

[jad]

you also get two different types of threads on the bolts, 12mm and something imperial but i cannot quite remember what it is... yours assuming it is original should be the imperial size

[Paul Woodward]

The bolt sizes are 12mm or 7/16 UNF. The bolt spacings are the same though.

If you want to fit calipers with 12mm bolts on a 7/16 UNF hub then you'll need to have some special bolts made.

There are a variety of different piston sizes depending on year and if it's 90 or 110.

[Mo Murphy]

Ok, so if I wanted to fit vented discs to my 1984 90 with an original unvented disc axle, which calipers would I need assuming, as I am, that the hubs would be imperial ? Perhaps they'd be metric by 1984 ?

Lets use Paddocks front brake page as a common reference point for simplicitys sake

Mo

[Maverik]

The bolt sizes are 12mm or 7/16 UNF. The bolt spacings are the same though.

If you want to fit calipers with 12mm bolts on a 7/16 UNF hub then you'll need to have some special bolts made.

There are a variety of different piston sizes depending on year and if it's 90 or 110.

Could you clarify something. why if the bolt pattern is the same cound I not just fit a new caliper (metric later one) using the original UNF bolts?

cheers

[jad]

you can do. there is a small amoutn of play in the holes but nothing major. mines has been like it for a year or so with no problems

[jad]

actually i cant remember which way roung i did it. obviously the smaller bolt went through the bigger hole!. I put a H reg disco axle on a G reg defender

[Paul Woodward]

you can do. there is a small amoutn of play in the holes but nothing major. mines has been like it for a year or so with no problems

In my opinion this is not safe. Please dont do it. This is the brakes!!

I used These discs..

With These calipers. ST1266 & ST1267.

[Mo Murphy]

What year are the axle components on your 90, Paul ?

Mo

[Paul Woodward]

Mo,

The case and hubs are Range Rover 3.9, 1990 with abs. The swivels are Disco (taper bearings top and bottom). The stub axles, wheel hubs and cv's are from a 1984 90.

My hubs have the 7/16 UNF caliper bolts so I have made stepped bolts to suit the 12mm caliper holes.

You could use the RR calipers of course but they have 2 inlet pipes. The pistons and pads are also smaller than the 110/130 calipers.

Paul.