XJ disc conversion options

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Oct 14, 2013 | 10:04 PM

#31

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by AVjeeper

FYI...
About 6 or 7 months ago:
I converted my 89 XJ Dana 44 to the Tera-Flex rear disc brake conversion.
After the install, I really didn't feel a difference in stopping ability.
The last month or two my brakes have squeeled and the brake pedal pulsed and felt soft.
I got furloughed with the gov't shutdown (Vote out all the democrats) so I've been doing maintenance on the XJ.
I changed the front brakes and the front rotors were really scored bad.
I went to do the back brakes and they looked like they were installed yesterday. No visible wear.
I bled the brakes but no change in stopping or feel.
I then took off the o-ring from the piston in the proprtion valve and bled the brakes again.
Holy stopping power Bat Man! Significant change for the better. I would guess my stopping distance is now half of what it was.
I'll have to get around to doing the brake booster upgrade and really experience some stopping power.
Cheers,
Jason

Sorry about the loss of your job. What a crock of **** in Washington.

Installing the "guts" of a 94 to 98 ZJ prop valve into your 89's prop valve will really help on a disc conversion also.

Oct 14, 2013 | 10:21 PM

#32

AVjeeper

Seasoned Member

Joined: Sep 2009

Posts: 299

Likes: 12

From: Whittier, Ca

Year: 1989

Model: Cherokee

Engine: 4.0L

Installing the "guts" of a 94 to 98 ZJ prop valve into your 89's prop valve will really help on a disc conversion also.[/QUOTE]

Thanks Cruiser. Are the internal parts for the prop valve sold anywhere, or do I have to find the whole unit at the junk yard?

Oct 14, 2013 | 10:51 PM

#33

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Get the guts at the JY. Requires a 3/4" wrench/socket. Be careful. They're somewhat spring loaded.

Oct 15, 2013 | 06:07 PM

#34

Big David

CF Veteran

Joined: Jun 2011

Posts: 2,720

Likes: 44

From: Gainesville GA

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0

This is the "guts" you need from the proportioning valve.

The silver one is from a I-6 & the red one is from a V-8.

Oct 15, 2013 | 06:46 PM

#35

AVjeeper

Seasoned Member

Joined: Sep 2009

Posts: 299

Likes: 12

From: Whittier, Ca

Year: 1989

Model: Cherokee

Engine: 4.0L

Quote:

Originally Posted by Big David

This is the "guts" you need from the proportioning valve.

The silver one is from a I-6 & the red one is from a V-8.

Big David,
Is the piston different or is the spring tension different?

I've been hoping I could just order the guts somewhere but can't find it. I think the whole manifold has to be purchased.

Oct 15, 2013 | 06:55 PM

#36

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by AVjeeper

Big David,
Is the piston different or is the spring tension different?

I've been hoping I could just order the guts somewhere but can't find it. I think the whole manifold has to be purchased.

Must get guts from JY.

Oct 17, 2013 | 07:56 PM

#37

Serenity

Junior Member

Joined: Sep 2010

Posts: 79

Likes: 0

From: Ottawa, On Canada

Year: 1994

Model: Cherokee

Engine: AMC 242 I6 4.0 H.O

Can't you just use the proportioning valve from a ZJ? Why just the guts? Aren't they the same with the exception that the guts from the ZJ allow more fluid?

Oct 17, 2013 | 08:16 PM

#38

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Serenity

Can't you just use the proportioning valve from a ZJ? Why just the guts? Aren't they the same with the exception that the guts from the ZJ allow more fluid?

Sure you can. If you want to screw around with 4 possibly rusted brake line fittings, wrestling it into place, and getting the lines started, bleeding the complete system. Go for it.

But why? One plug removed from the prop valve and swap the guts. Your choice.

Oct 17, 2013 | 08:26 PM

#39

Serenity

Junior Member

Joined: Sep 2010

Posts: 79

Likes: 0

From: Ottawa, On Canada

Year: 1994

Model: Cherokee

Engine: AMC 242 I6 4.0 H.O

Quote:

Originally Posted by cruiser54

Wow....didn't realize I'd get so much attitude for a simple question. Thanks for the info but not the tone it was delivered in.

Oct 17, 2013 | 08:32 PM

#40

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Serenity

Wow....didn't realize I'd get so much attitude for a simple question. Thanks for the info but not the tone it was delivered in.

Facts, not attitude. Put your big boy pants on.

Oct 17, 2013 | 08:38 PM

#41

Serenity

Junior Member

Joined: Sep 2010

Posts: 79

Likes: 0

From: Ottawa, On Canada

Year: 1994

Model: Cherokee

Engine: AMC 242 I6 4.0 H.O

Quote:

Originally Posted by cruiser54

Facts, not attitude. Put your big boy pants on.

You think I would have asked if I knew these facts? Not everyone is born with a lifetime of knowledge as you seem to have been. And really dude? Big boy pants? That's pretty childish if you ask me. And as for this this little squabble, I'm done.

Oct 17, 2013 | 08:41 PM

#42

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Asking is fine. Reading attitude that is not, and was not intended into my answer is nuts.

I think you're being too sensitive.

Oct 17, 2013 | 08:48 PM

#43

Serenity

Junior Member

Joined: Sep 2010

Posts: 79

Likes: 0

From: Ottawa, On Canada

Year: 1994

Model: Cherokee

Engine: AMC 242 I6 4.0 H.O

Quote:

Originally Posted by cruiser54

Asking is fine. Reading attitude that is not, and was not intended into my answer is nuts.

I think you're being too sensitive.

Your right. If no attitude was intended, then I apologize. It was the way your answer was delivered that led me to believe there was. Either way, I do appreciate the facts. Saves me a lot of headache for when I do my conversation.