type 3 rear brake swap

What do I need to order to fit T-3 rear brakes to my IRS T-1 pan. Naturally drums, shoes, and cylinders but will the hardware and backing plates work?

Any machine work required?

Maybe you can find out something on theSamba.com.

I seem to remember that you have to machine some off the surface behind the nut.

I looked into it at one time- there is an article in one of the VW Performance Magazines (Peterson?) that talks to it. As you pointed out the T3 drums are wider and larger diameter. I do recall that backing plates needed to be swapped. Even in states T3 parts are hard to come by.

Here's all I could find on quick internet search - Type 3 (Squareback, Notchback or Fastback) had 45mm wide brake shoes, giving a lining area of 69 square inches, with slightly larger drums at 248x46mm, rather than 230x40mm on 1968-or-later Beetles. The Type 3 already uses a 22mm rear brake cylinder as standard, which will give greater rear brake bias (good on light front end Speedsters and dune buggies).

Note: Using the larger Type 3 brakes on the rear will increase the track by about an inch (so sounds like machining of drum nut area or longer axels might be needed)

http://www.aircooledvwaddiction.com/modules.php?name=News&file=article&sid=42

My Type 3 upgrade was a direct bolt on. you do put a wider seal spacer under the drum I used the Type 1 seal spacers. and washers if needed. But I recall using any washers at all.

This is a bit of a problem for me as one needs the complete T-3 set up backing plates and all - not so easy to find in Thailand never mind in the States.

Thanks for all the help but even if it was all readily available, the cost must approach that of a bolt on rear disc set up at 320.00 c/w handbrake from CIP.

I looked up those articles in VW books - no real details except to say you need the longer axels used in 68 up bugs. So if yours is older you'd need a few more pieces too then. I wonder if the mentioned larger diameter wheel cylinders would benefit rear braking on a Speedster. I recall 914 owners were using 911 master cylinders with larger bore with good results. Adding more bias to rear brakes would be good thing.