Brakes not working in 4WD low

Tiny
KEVINYJ
  • MEMBER
  • 1995 JEEP WRANGLER
  • 2.4L
  • 4 CYL
  • 4WD
  • MANUAL
  • 213,000 MILES
I go camping and/or off-roading fairly regularly in my 95 Wrangler YJ. Last time I was out for a day drive I noticed going downhill in 1st gear, 4wd low that my brake pedal was doing virtually nothing to stop or even slow my Jeep. The pedal didn't go all the way to the floor, so I don't suspect that it is a problem with air in the lines. It is my everyday driver, and I have no problems while in 2wd. For that matter, I haven't noticed the brake problem at all except for the downhill in 4wd low. I park it in 4wd if I'm on a hill because my parking brake pedal is busted, and when I pull up to the curb in 4wd I am able to stop fine. I have found nothing specific to this issue online or in any Jeep forums. Thank you for any help you can give me.
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Monday, May 4th, 2015 AT 1:03 PM

3 Replies

Tiny
CJ MEDEVAC
  • EXPERT
I RECKON YOU SHOULD FEEL SOME "SLOW DOWN" IN 4WL

HOW IS IT WHEN IN 4WL AND YOU PUSH THE CLUTCH IN AND BRAKE?

I HAVE A '77 CJ-5 AND A '46 WILLYS (I'VE HAD 5 OTHER CJ-5s IN THE PAST- AND NEVER HAD ANYTHING ELSE FOR A DAILY DRIVER SINCE I WAS ALLOWED ON THE ASPHALT IN 1981)

I DON'T KNOW YOUR MAINTENANCE HABITS OR ABILITIES

MY PRESENT '77 (AND THE '46 TOO) HAS DRUM BRAKES ALL THE WAY AROUND

UNLESS YOU REPLACE/ CLEAN AND LUBRICATE THE SELF ADJUSTING HARDWARE, LIKE YEARLY.,.,.,.,.,.,IT WON'T CONTINUE TO ADJUST.,.,.,.,.THE PEDAL WON'T STAY HIGH, AND WORST OF ALL, THE FRONT BRAKES WILL START GRABBING ONE SIDE OR THE OTHER AND MAKE THE STEERING JERK ONE WAY OR ANOTHER.

LUCKILY, I'M REALLY UP ON THE CJs AND AM ABLE TO KEEP 'EM GOOD TO GO! (I ALSO ANSWER MOST OF THE CJs THAT COME HERE)

DO YOU KNOW HOW TO ADJUST YOUR REAR BRAKES?

HERE'S THE WAY I BLEED

SEE "MY ANSWER" ON "JULY 4" IN THIS LINK

http://www.2carpros.com/questions/1999-ford-f-150-brakes--3

AIR IN THE LINES, FRONT OR REAR MAY STILL GIVE YOU "BRAKES", NO AIR AND NOTHING BUT FULL HYDRAULIC PRESSURE WILL GIVE YOU THE BEST-US OF BRAKES!

I'M HERE TO HELP- YOUR TURN WITH YOUR THOUGHTS?

THE MEDIC

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Monday, May 4th, 2015 AT 4:10 PM
Tiny
KEVINYJ
  • MEMBER
Hello, and thank you for your response!

I have limited maintenance abilities, but am improving with each thing that happens to my Jeep, ha! I have had it for about 4 years and try to do everything myself - except when I had the transmission rebuilt and the clutch replaced. Everything I know about cars has come from doing things myself to the Jeep out of necessity and watching videos and reading Jeep forums to get tips and tutorials.

To answer your first question the brakes DO work in 4wd if I have the clutch pushed in, but not without. I feel confident that I could bleed the brakes properly with the help of a buddy. I have discs in front and drums in rear. I have never adjusted the rears, but have been meaning to do an overhaul of them; it just looks like a lot of intimidating steps for me to take on without ever having done it before! But I hate the idea of taking it to a shop if it's something I can do myself. I've never touched them in the time I've owned the Jeep but have done pads and rotors in front twice now.

A buddy also told me to replace the master cylinder and booster, and I found both for $150. Would you recommend doing all of these things? Booster, master cylinder, bleed and rear brake overhaul? I have an off-roading trip planned later this month and would love to be able to make it there and back alive, ha!

Really appreciate your help and advice!
Best,
Kevin
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Monday, May 4th, 2015 AT 9:16 PM
Tiny
CJ MEDEVAC
  • EXPERT
AS FAR AS 4 LOW, IT'S A TOUGH REALLY GEARED DOWN SPEED, IT IS HARD TO BOG IT DOWN

IN FACT, I TAUGHT MY DAUGHTER HOW TO DRIVE "WILLY", STARTING WHEN SHE WAS 7 YEARS OLD, 100% PROFICIENT AT AGE 10, THIS INCLUDED BASIC TROUBLESHOOTING, HAND CRANKING, CHANGING THE OIL (DOING OTHER MAINTENANCE PROCEDURES)

SHE LEARNED IN 4 LOW, THIS SAVED MY STARTER FROM MEGA CRANKINGS, GETTING PAST "DUMPING THE CLUTCH" AND THE ENGINE DYING IS ALMOST NON-EXISTENT IN 4 LOW, THIS MADE IT EZier AND LESS STRESSFUL ON HER TILL SHE MASTERED EASING THE CLUTCH OUT

PICS OF HER AT 10 (SHE LIKED THE HAND CRANK OVER THE STARTER SO SHE COULD SHOW OUT)

HER BIRTH DATE IS THE HOOD NUMBERS- WHICH MEANS SHE'S GONNA INHERIT HIM! 'SPECIALLY SINCE SHE "HELPED" RESTORE HIM AT AGES 3 AND 4

IT'S YOUR CALL!

I TEND TO "OVER MAINTAIN MY TWO TOO"

IF THE MASTER AND BOOSTER AIN'T LEAKING AND SEEM TO BE OK - I'D PROBABLY LEAVE 'EM ALONE!

YOU GOTTA MAKE FRIENDS WITH SOME "AUTO EXPERIENCED FELLERS" (ONES THAT ACTUALLY "KNOW", NOT "EXPERIMENTERS")

YOU NEEDTA LEARN, EVEN IF YOU PAY THE KNOWLEDGEABLE AUTO PARTS STORE "GENIUS" TO COME TO YOUR HOUSE AFTER HOURS TO SHOW YOU HOW!

. AND YOU CAN FIND A FELLER LIKE THIS, IF YOU HAVE A TRADE-ABLE SKILL, IT'S EVEN BETTER TO BARTER!

"YOU TUBE" GIVE YOU SOME HELP - AT LEAST IN HOW THE TOOLS WORK - EVEN IF YOU WATCH ANOTHER CAR'S REAR BRAKES

"ERIC THE CAR GUY" IS VERY INFORMATIVE ON TOOL USAGE AND INSPECTIONS/ CLEANING/ TIPS (LOOK FOR HIS VIDEO ON DRUM BRAKES - IF HE HAS ONE FOR FORDS, EVEN BETTER)

UNTIL YOU ARE SKILLED W/ THIS

ALWAYS ONLY DISASSEMBLE ONE SIDE

TILL YOU GET THE OTHER DONE

- IT WILL BE A "MIRRORED IMAGE" TO GO BY WHEN YOU START SCRATCHING YOUR HEAD

PRIMARY AND SECONDARY SHOE PLACEMENT IS CRITICAL- EVEN ON MINE, DRUMS ALL THE WAY AROUND, THE SHORTER SHOE LINING GOES "FORWARD" OR CLOSEST TO THE FRONT OF THE VEHICLE

THE LONGER SHOE LINING GOES TO THE REAR

THIS APPLIES TO BOTH SIDES AND BOTH AXLES

(NOT 2 SHORT ON ONE SIDE- AND NOT 2 LONG ON THE OTHER SIDE) THIS IS SORTA IMPORTANT!

SEE MY SO VERY SIMPLE BRAKE SYSTEM ON MY '46 WILLYS SHOES IN THE 1st PIC - FRONT OF JEEP IS TO THE RIGHT- NOTICE SHOE LINING LENGTHS

AGAIN IN 2ND PIC- FRONT OF JEEP IS TO THE RIGHT

SORTA WHAT STATE ARE YOU IN? I HAVE SOME POSSIBLE WAYS TO SAVE MEGA BUCKS!

YOUR TURN

THE MEDIC
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Tuesday, May 5th, 2015 AT 5:23 PM

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