Author Topic: I rebuilt my rear end..  (Read 4323 times)

jethat

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I rebuilt my rear end..
« on: June 28, 2010, 11:56:08 PM »
Rear suspension converted to rear disk got a rebuilt traction loc rear with 370-1 gear.
I cant get the brakes to bleed up. Anybody ever do the rear disk  brake conversion? The whole deal was a kit. New housing axle splines and all. Its all ready to go if I can ever figure out how to bleed them..

Soaring

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Re: I rebuilt my rear end..
« Reply #1 on: June 29, 2010, 01:34:55 AM »
What have you tried so far? 

jethat

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Re: I rebuilt my rear end..
« Reply #2 on: June 29, 2010, 08:19:28 AM »
I've done the pump the brakes up hold open bleeder method. I used a pump and sucked the fluid out of the bleeder. I took the rear caliper off pumped it up and compressed it closed with a c-clamp. That actually made them better. I'm thinking I migt do that again only next time I'll open the bleeder and put the lid on the master cylinder....

66GTKFB

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Re: I rebuilt my rear end..
« Reply #3 on: June 29, 2010, 11:04:43 AM »
You may have a proportioning valve in the brake line if the car was originally front disc - rear drums. It's probably part of the distribution block.  I don't know if a valve is required in a four wheel disc setup like you have, but I do know that an adjustment to one is required for different combinations of drum and disc.
Jim

jethat

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Re: I rebuilt my rear end..
« Reply #4 on: June 29, 2010, 01:04:10 PM »
What I've found out is I need the distribution block with out the valve that maintains 10 lb of presure in the rear line. Mustangs unlimited has one but I'm not sure if its the right one.. Still thinking about it.

66GTKFB

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Re: I rebuilt my rear end..
« Reply #5 on: June 29, 2010, 02:14:34 PM »
Depending where you are located, you might consider finding some Mustang racing guys that have done and perfected what you are trying to do. Laguna Seca in California, Lime Rock in Connecticut come to mind.
Jim

jethat

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Re: I rebuilt my rear end..
« Reply #6 on: June 29, 2010, 02:33:53 PM »
I'm in Utah. I'm researching it before I do anything else. This has turned out to be a MAJOR project..

Jeff73Mach1

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Re: I rebuilt my rear end..
« Reply #7 on: June 29, 2010, 06:30:22 PM »
did you replace the master cylinder or use the existing one, and if you used the existing one did you remove the restictor to the rear?

You may need to bench bleed the master cylinder to get it as air free as possible.  With a master cylinder change, it is usually necessary to bleed the brakes multiple times to get all the air out.

Soaring

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Re: I rebuilt my rear end..
« Reply #8 on: June 29, 2010, 06:49:45 PM »
Good point.  When I replaced my single jelly jar MC with the two bowl, I had to bench bleed it.  I've never had a problem since then. 

jethat

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Re: I rebuilt my rear end..
« Reply #9 on: June 29, 2010, 08:33:05 PM »
The local mustang restoration joint, Mustang Ranch says I have to replace the master cylinder. Guy says it a $35 part just get one for a early ford or lincoln 4 wheel disc brake car. So thats the plan. Will see how that works out but the guys there say thats all I need.

Soaring

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Re: I rebuilt my rear end..
« Reply #10 on: June 29, 2010, 09:54:16 PM »
Yeah, if that MC hasn't been replaced in the process of upgrading, then that makes sense.  Get a 1967 Mustang two bowl.  Be sure to bench bleed it before putting it in.  Did you also replace the brake lines as well?  If not, I would do that as well.  We'll get you there brother.  Hang.....

jethat

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Re: I rebuilt my rear end..
« Reply #11 on: June 29, 2010, 10:44:43 PM »
I've replaced most of them. The only ones that remain are the master to dist block steel ones and the steel fronts. I'm gonna go ahead and replace the master to dist block ones but the front steel lines I'm really not to hot on replacing because they are hard to get to and frozen on and all. All rubber lines are new. Now I have replaced every single suspension and brake part on the car.
What I've read is I could use the Disc/Drum master if I removed that residual pressure valve from the rear brake line fitting on the master. Have to take the master out to do that so I might as well get a new one.
I think if I had just kept bleeding it sooner or later it would have blead up and worked. I've been told it can take a gallon or more of brake fluid by the guy who sold me the kit to bleed them up (I've never used that much to bleed any brake and I've done this sort of crap a few times) That guy also said the residual valve is in the distribution box and from what I've been told and read its in the master. I'll pick up the cylinder tomorrow and if I have time i'll install it.
What this bench bleeding? I've been told I shoulda done that to the calipers to. How do you do that?

Soaring

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Re: I rebuilt my rear end..
« Reply #12 on: June 30, 2010, 05:47:42 AM »
When you buy a new MC, put it in a vice on the bench, and get the kit when you buy your fluid.  The kit has two soft plastic hoses that connect the system together.  Fill up the bowls, and using a blunt end of a tool, pump up the MC.  That gets all the air out of the MC and keeps it full while you put it on the car. 

jethat

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Re: I rebuilt my rear end..
« Reply #13 on: July 01, 2010, 10:59:12 PM »
So after searching the local parts joints and not finding a master that excited me at all I search the NPD book and found a stock looking one they say is calibrated for 4 wheel disc. While I was at it I bought the combination valve or distribution block they had one also calibrated for 4wheel disc. then I bought the rest of the brake lines the ones I havent changed might as well I'm into it this deep..
So when I'm finished I will have replaced every brake and suspension part in the whole car.
I'll le you all know how it works out. should get the parts next week..

66GTKFB

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Re: I rebuilt my rear end..
« Reply #14 on: July 02, 2010, 01:53:24 PM »
Try Mustang's Plus in Stockton, CA for performance parts - http://www.mustangsplus.com/
Jim

jethat

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Re: I rebuilt my rear end..
« Reply #15 on: August 01, 2010, 09:31:05 PM »
so it turned out.. The calipers on this kit the way I mounted them the bleeder is low. I ended up taking them off holding the bleeder upright and they bled instantly.
Now my next project is looking to be the transmission. Think I might swap in a TKO 600..

Jeff73Mach1

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Re: I rebuilt my rear end..
« Reply #16 on: August 05, 2010, 10:54:51 AM »
I am out of town, but got a set of Baer Iron Sport rear disc brakes for my steed.  I'll delve into the installation in the next few weeks.  Your thread has been a good reminder of what to expect.

Thanks

jethat

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Re: I rebuilt my rear end..
« Reply #17 on: August 05, 2010, 10:56:45 PM »
I ordered a TKO 600 from Keisler today. Had them do the modification that improves the shifting from 2nd to third in high RPM's. Got a hurst shifter and all. Should be interesting. The car should be totally different when I get it up and running again.
The only real thing you have to do the the brake system when converting to 4 wheel disc if remove the ridual pressure valve from the distribution block. I got a master calibrated for 4wheel disc out of the NPD book for $50 but it probably would have worked with the stock one.
Baer should be better the bleeder in the right spot and all..

Jeff73Mach1

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Re: I rebuilt my rear end..
« Reply #18 on: August 09, 2010, 03:20:32 PM »
cool!  Glad you got the TKO upgrades.  Now you need to build a monster engine to take advantage of it.

jethat

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Re: I rebuilt my rear end..
« Reply #19 on: August 10, 2010, 08:10:06 AM »
After all this has cost me any more is going to have to wait at least a couple of years.. I do have a spare virgin block and a extra set of 4v closed chambered heads.. might buy a stroker kit.. Have to see how it goes. I've had this car for along time. I've actually thought of selling it. Thats not going to happen now for at least a couple more years..

 

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