View Full Version : Need help on MC purchase

04-12-2007, 06:35 PM
I have a line on a 73 LC Master cylinder for my 4Runner. Plan is to go to IFS calipers and eventually rear discs. Will the MC work on my 85 4runner or should I get another model? I can get it for $25 but that is not the deciding factor, I want something that will do the job.

So far I have the IFS style discs and Bill M showed me how to get new calipers for a fair price. I am piecing the rest together and once all the parts are on the shelf I will convert.

Any comments and or suggestions are wanted and mostly needed:p:


04-12-2007, 08:41 PM
80 Series or some later Taco or T100 MCs are the hot setup. You want a 1" bore ideally, with a V6 vacuum assist, for the most powerful brakes. 13/16" will stop you but it gets eerily close to max travel on the MC. NOT fun holding a hill in a spooky 4x4 situation. If you go 1" only, using your I4 vacuum assist, your foot won't be happy. But you will stop. DAMHIK

Trip to the Yota Yard for the vacuum assist, and Napa for the MC, will make you and your wallet the happiest long term IMHO. Lifetime warranty on the nicer NAPA MC that costs a tad more. Aisin is stock but will set you back (and no warranty), although I believe Allpro and TG sell an aftermarket version that should work OK. You don't care about the 'residual valve' they talk so much about.

04-13-2007, 12:34 PM
Will have to price a new one at Napa, thanks for the info.

04-16-2007, 08:19 PM
I used a M/C for a 76 FJ40 application on my daughter's 85 4runner, bolted right up, worked great.

04-17-2007, 12:50 AM
Good to hear, as funds are running low I like the less expensive rout but we'll see.

04-17-2007, 07:42 AM
Tom, you will want a 1" bore if you will use IFS calipers though.

04-17-2007, 08:47 AM
I take it the LC does not have that? In that case the LC is out and the waiting game begins. I am trying to get this done before Moab but .............we'll see.

04-17-2007, 07:08 PM
Tom, you will want a 1" bore if you will use IFS calipers though.FYI, the non-USA M/C for a late-model (1977-1983) *J45 all drum is 1-1/8". It moves more fluid but takes more leg pressure (duh - physics!). It has the same bolt pattern as any booster-equpped LC and would thus fit the 1st gen runner. And cheaper than the USA version from $OR!