next to nothing REAR BRAKE PROBLEM

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MuddyMudSkipper

NAXJA Forum User

• Apr 3, 2005

• #1

89 XJ D44 front 8.8 rear
NEW master cylinder/brake lines/calipers/pads/rotors/drums/shoes/wheel cylinders
system bled 5 times, still have little to no rear braking power!!!
changed the master twice and the proportioning valve with junk jeep that the brakes were working on, still little to no rear brakes!!!
what the heLL is wrong!
help please

 

XJ_ranger

NAXJA Member

NAXJA Member

Location

Port Orchard, WA

• Apr 3, 2005

• #2

what master cylender?

the stock XJ MC might not be moving enough fluid to push the new calipers... they are HUGE compared to the stock caliper pistons...

 

Eagle

Lifetime NAXJA Member

NAXJA Member

Location

Terra Firma

• Apr 3, 2005

• #3

New drums?

Is the 8.8 disc brake, or drum?

 

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Bmxpunk1369

NAXJA Forum User

Location

Bridgewater, NJ

• Apr 3, 2005

• #4

he said new calipers/pads/rotors so i tihnk its a disc. It is true about the bigger brakes but it still should respond to some degree. Maybe the brake lines are shot. Could try some new lines in the rear.

 

XJ_ranger

NAXJA Member

NAXJA Member

Location

Port Orchard, WA

• Apr 3, 2005

• #5

Bmxpunk1369 said:

he said new calipers/pads/rotors so i tihnk its a disc. It is true about the bigger brakes but it still should respond to some degree. Maybe the brake lines are shot. Could try some new lines in the rear.

Click to expand...

good call - did you check your hard lines?

 

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Iminocca

NAXJA Forum User

Location

Orange

• Apr 3, 2005

• #6

I had that problem after I installed my 8.8. Turns out the calipers were installed upside down (reversed right to left). This allows an air pocket to remain in the caliper that cannot be bled out. If that's your problem it's an easy fix.

 

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BUCKYXJ

NAXJA Forum User

Location

Tulsa, OK

• Apr 3, 2005

• #7

yup probably the calipers are upside down that is the problem I see 8 out of 10 times. make sure the bleeder valve is at the top. If thats not are u running the stock prop valve and booster? If its the stock valve it will not move enough fluid to work the rear brakes very much at all. might try removing the oring in the prop valve and see if that helps.

 

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MuddyMudSkipper

NAXJA Forum User

• Apr 4, 2005

• #8

this is a problem with the REAR DRUMS fullsize axles, D44 front has new caliper/pads/rotors
I will try the proportioning valve thing as that is what it seems like, the rear isnt getting enough fluid pressure

 

B

BUCKYXJ

NAXJA Forum User

Location

Tulsa, OK

• Apr 4, 2005

• #9

drums suck in general probably just need adjusted though

 

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Iminocca

NAXJA Forum User

Location

Orange

• Apr 4, 2005

• #10

MuddyMudSkipper said:

this is a problem with the REAR DRUMS fullsize axles, D44 front has new caliper/pads/rotors
I will try the proportioning valve thing as that is what it seems like, the rear isnt getting enough fluid pressure

Click to expand...

Drums, yeah, I knew that....