Heard grinding noise, thought it was from rear drive line

Tiny
RIKPHRED
  • MEMBER
  • 1980 JEEP CJ7
  • 5.7L
  • V8
  • 4WD
  • MANUAL
  • 290,000 MILES
Heard grinding noise and felt vibration, thought it was from rear driveline, thought it might have been my drive shaft. Wasn't continuous only occurs when jeep is in motion. Doesn't matter if clutch is engaged or not. No change accelerating or braking, turning makes no change. Changed both U-joints on rear drive line. Didn't help. Checked fluid level and verified ok on both dif's, transfer case and transmission. Local mechanic couldn't find anything wrong. Drove jeep to work, still makes noise still intermittently but more pronounced. While driving slowly with the window down I was able to hang my head out the window. Sounded like it might have been the front end. On a lark I engaged both wheel locks, noise and vibration went away. Any suggestions?
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Wednesday, July 15th, 2015 AT 4:28 PM

16 Replies

Tiny
CJ MEDEVAC
  • EXPERT
RECKON MAYBE THAT ONE OF YOUR HUBS WAS LOCKED IN?

MAYBE MR. TRANSFER CASE WAS NOT QUITE IN THE 2WD SLOT?

I'VE FOUND THAT FOLKS (GENERALLY JEALOUS ONES) WILL COME ACROSS YOUR RIG IN A PARKING LOT, AS AN AUTHORITY ON "YOUR JEEP" THEY'LL THEN DEMONSTRATE TO THEIR FRIENDS HOW TO TURN THE HUBS.

MONTHS LATER, THEIR COUNTERPARTS WILL COMMENCE TO SHIFTING BOTH STICKS INSIDE YOUR JEEP. AFTER THEY ENGAGE THE EMERGENCY BRAKE (IF YOU HADN'T ALREADY DONE IT) THEY WILL QUICKLY VACATE THE AREA. WHEN YOU GET IN, FIRE HIM UP, THEN LET OUT ON THE CLUTCH, IT WILL NOT MOVE IN ANY GEAR!

EITHER YOU WILL FIGGER IT OUT, OR YOU WILL SEND US ANOTHER QUESTION! THE ANSWER WILL BE: "YOUR TRANSFER CASE IS IN NEUTRAL!"

MY PAL HAS A SECURITY SYSTEM THAT WORKS WELL SEE PIC (THIS GUYS SHOULDER'S COME UP TO MY HIPS!) SEE 1st PIC

SO LIKE DOES THE RACKET COME BACK WHEN DISENGAGED AND BACK IN 2WD?

REST OF THE PICS ARE OF MY TWO

THE MEDIC
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Wednesday, July 15th, 2015 AT 6:51 PM
Tiny
RIKPHRED
  • MEMBER
Glad to see the Jeep Medic is still at this site. You've helped me a couple times before. I checked the transfer case, both shifters were in the correct position. I engaged them and returned them to their correct position earlier. When I engaged the wheel locks both appeared to be disengaged. They are quarter turn Superwinch wheel locks. I haven't disengaged them from yesterday. I'll disengage them tomorrow and let you know what sounds I get.

FYI: some background on my jeep: I do some DIY, some shop, engine was built by Precision Engine in Houston, 9: 1 compression 204/214 @.050 cam, Thorley tri-Y exhaust headers, 2" dual exhaust w/crossover no Cat, Edelbrock performer intake, Edelbrock Thunder series AVS 650 cfm carb with electric choke. Carb is still factory set and a little rich, true idle speed 800 rpm when warm. New mechanical fuel pump, diaphragm booster fuel pump by the tank (cured the vapor lock), recent fuel filter, new wires, plugs, cap rotor, high flow water pump and high flow thermostat, new belts, hoses, etc. Davis Unified Ignition, power steering, power brakes with dual diaphragm upgrade, four speed rebuilt Tremac 176 transmission, rebuilt Dana 300 w 4:1 low range w/ JB Custom split shifter, New U-joints on rear driveline, AMC 20 rear end with Summers brothers nickel chrome-moly axle & welded tubes 33x10.5-15 s on American Racing wheels. Hayes clutch and flywheel when rebuilt. Has ARB air lockers front and back, 4:11 dif, sway bar disconnects, 2 inch lift, etc . The vacuum advance is connected to the carb the PVC is still intact the rest of the pollution gear is gone, no pollution inspection required & none installed. PS: I'm the original owner.
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Wednesday, July 15th, 2015 AT 8:03 PM
Tiny
CJ MEDEVAC
  • EXPERT
YOU KNOW, MY PICS ARE NOT THE ONLY ONES THEY ALLOW ON HERE!

NOT BEING MR. CYBER GUY, I DO KNOW THEY CANNOT BE "TOO BIG" OR THEY WON'T POST. (I HAD TO RE-SIZE THE ONES I TOOK WITH MY CANON REBEL, WHICH I COULD STAND SOME LESSONS ON USING IT TOO!)

I HOPE WE GET YOU ALL FIGGERED OUT, WITHOUT SPENDING THE $$$

I'M NOT A GREAT WRITER, BUT SOMETHING BELOW MAY SPARK AN INTEREST

LOOK THIS ONE OVER - THEN LOOK AT THE LINK AT THE END OF IT. YOU MIGHT GET MAX EFFICIENCY OUT OF YOUR CARB

http://www.2carpros.com/questions/1993-ford-f-350-f350-351w-standard-trans-had-edelbrock-fuel-injection-24lbs

WAITING FOR THE RACKET NEWS TOMORROW AFTER WORK

THE MEDIC
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Wednesday, July 15th, 2015 AT 8:51 PM
Tiny
RIKPHRED
  • MEMBER
By the way, when I said wheel locks I meant that I was engaging my locking hubs
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Thursday, July 16th, 2015 AT 5:19 AM
Tiny
CJ MEDEVAC
  • EXPERT
I KNEW WHAT YOU MEANT!

ONCE YOU UNLOCK 'EM AND DO YOUR RACKET TEST

LET'S SEE IF THEY REALLY UNLOCKED

GO TO EACH SIDE AND SEE IF THE U-JOINTS WILL TURN WITH YOUR FINGERS

SEE MY AWESOME PIC 1! YES, THOSE ARE MY REAL STUD-LIKE, BEAT UP FINGERS!

WHILE YOU ARE DOING THAT, MIGHT AS WELL MOVE 'EM BACK AND FORTH JUST A LITTLE SO YOU CAN MAYBE IDENTIFY ANY SLOP IN THE YOKES OF THOSE U-JOINTS.

I BOUGHT NEW ONES FOR MINE 3 YEARS AGO - I SORTA NEED TO PUT 'EM ON!

THE MEDIC
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Thursday, July 16th, 2015 AT 3:12 PM
Tiny
RIKPHRED
  • MEMBER
I unlocked the hubs, drove 1 mile, small undulation in the road and the noise and minor vibration came back. Noise is there when steering, straight line, accelerating and deaccelerating. I tried locking just the left locking hub and the noise quit. Then my wife got mad that I wasn't taking care of the yard work so I changed focus. I did try to rock the wheels side to side, they don't. U-joints on the front are as tight as the new ones on the rear drive shaft. Then I got another visit from my wife. I'll check more tonight.
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Friday, July 17th, 2015 AT 5:56 AM
Tiny
CJ MEDEVAC
  • EXPERT
ALL RIGHTY THEN

I WAS SPEAKING OF THE U-JOINTS IN THE MIDDLE OF THE STEERING KNUCKLE

(CHECKING THE FRONT DRIVE SHAFT DIDN'T HURT EITHER)

WHAT ABOUT HUBS UNLOCKED, TURNING THE LEFT AND RIGHT AXLES (AT THE U-JOINTS IN THE KNUCKLES) WITH YOUR FANGERS, WILL THEY TURN, OR IS ONE (OR BOTH) STILL LOCKED TO THE WHEEL?

(TURNING THE FRONT DRIVE SHAFT AIN'T GONNA TELL YOU)

THE MEDIC
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Friday, July 17th, 2015 AT 3:23 PM
Tiny
RIKPHRED
  • MEMBER
Figured you meant the steering U-joints, as the others shouldn't have been turning if the wheel locks disengage; but I was there. Its screaming hot outside, its a Texas thing. I put the jeep on jack stands first thing in the morning, check for disengagement and looseness. I'll send out a note first thing in the morning. I'll post a picture as well.
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Friday, July 17th, 2015 AT 7:04 PM
Tiny
CJ MEDEVAC
  • EXPERT
AIRBORNE!

THE MEDIC
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Friday, July 17th, 2015 AT 7:19 PM
Tiny
RIKPHRED
  • MEMBER
Jeep is up on the jack stands, hubs unlocked. Drivers side steering U-joint doesn't turn with the wheel, conversely wheel doesn't turn when manually turning the steering U-joint. Oddly enough the passenger side steering U-joint turns with the wheel in either direction as well as the wheel turns with the U-joint.
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Saturday, July 18th, 2015 AT 7:16 AM
Tiny
CJ MEDEVAC
  • EXPERT
NEAT RIMS!

THIS MEANS THAT "MOST" OF YOUR FRONT END STUFF HAS BEEN TURNING (INCLUDING THE DIFF). DEFEATING THE REASON FOR LOCKING THEN IN THE "OFF POSITION" (FRONT END AXLE PARTS WEAR AND FUEL MILEAGE)

GONNA HAVE TO TAKE THE HUB APART, CLEAN IT WITH BRAKE CLEANER/ OTHER

PAY SPECIAL ATTENTION FOR DAMAGES. SPRINGS/ CRACKS OR BREAKAGES/ EVEN A "SMEAR" OR BURR IN A MATTING SURFACE

OR

REPLACE 'EM

I HAVE INSTALLED SELECTRO HUBS ON MY '77 AND '46 (AND A FEW PREVIOUS OTHER CJ-5s).

MAINLY BECAUSE (WHEN I USED TO SUBJECT MY JEEPS TO HELL DAMAGE) THAT GOOD OLE RED CAROLINA MUD/ CLAY WOULD CAKE UP IN THE FINGER HOLES AND ALSO WOULD SORTA BIND THE PLASTIC WITH THE METAL. WITH THE SELECTRO HUBS, YOU GRAB THE WHOLE BODY AND TURN IT. IF IT MATTERS, THEY STICK OUT A LITTLE MORE THAN THE OTHERS.

WANT ME TO SEE HOW INEXPENSIVE I CAN FIND YOU A SET? I'M GOOD AT SURFING FOR THE BEST PRICES!

GOTTA HATE THESE CRAPPY LUG NUTS THAT RUST SO FAST AND EX - I ALSO HATE THEM STAINLESS STEEL ONES WITH A PERTTY SLEEVE THAT SEVERAL FALL OFF, LEAVING YOU WITH A DIFFERENT SIZE LUG NUTS!

THE MEDIC
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Saturday, July 18th, 2015 AT 8:30 AM
Tiny
RIKPHRED
  • MEMBER
I've looked on line for rebuild parts for the superwinch locking hubs. Couldn't find any. They were a replacement for the plastic warn hubs that were OEM. I'll probably just replace the hubs. Never heard of Selectro locking hubs, I'll have to look them up, I get a discount with 4WD, I'll see what they and Summit Racing have. Thanks for your help.

Never noticed the gas mileage drop, aerodynamics of a brick, lift kit, large tires, 4.11 gears, and a V8, hmmm.
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Saturday, July 18th, 2015 AT 9:18 AM
Tiny
RIKPHRED
  • MEMBER
Seems they, Mile Maker, doesn't make the Selectro for the Dana 30 on a 1980 CJ7. I can find the Warn Premium, Mile Marker 457, Rugged Ridge and Crown. I've never had anything from Crown that fit without modification so they are out. Any preferences with the others?
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Saturday, July 18th, 2015 AT 9:57 AM
Tiny
CJ MEDEVAC
  • EXPERT
WAS THERE ANY SLOP IN THOSE U-JOINT ASSEMBLIES?

YEP, A 27 SPLINE SELECTRO JUST AIN'T-A-HAPPENING! (2 HOURS OF OFF AND ON SEARCHING)

SO IT'S UP TO YOU AS FAR AS BRAND AND SUCH

I DO HAVE YOU A "CHEAP GUY" WAY OUT, FOR THE HUBS (OR ANYTHING ELSE). ONE YEAR WARRANTY AND FROM A REPUTABLE COMPANY. I JUST DON'T THINK YOU COULD CHEAP OUT ANY BETTER THAN THIS METHOD!

http://shop.advanceautoparts.com/p/rugged-ridge-manual-locking-hubs-jeep-cj5-cj7-cj7-72-80-jeepster-72-73-international-s-15001.02/10179614-P?searchTerm=locking+hubs

YOU'LL UNDERSTAND THIS SOON! THIS WOULD BE "A" ORDER ALL BY ITSELF, AS IT'S ALREADY OVER $110 (START A NEW ONE IF YOU NEED MORE STUFF). "A124" IS STILL ALIVE!

READ AND FULLY UNDERSTAND THIS LINK BELOW, IT MAY BE LOCAL FOR YOU TOO. MEANING ORDER ONLINE, PICK UP AT THE STORE AFTER A 30 MINUTE WAIT, BUT IT WILL ALSO WORK BEING SHIPPED. WEIGH OUT SHIPPING CHARGES (BEING DEDUCTED) AS OPPOSED TO SAVING THE $40) ANY SAVINGS MIGHT BE BETTER THAN NONE! IF YOU AIN'T CATCHING SOMETHING, JUST ASK ME!

http://www.2carpros.com/questions/2001-dodge-neon-milage-just-want-put-fliuds-their-locations

YOUR TAKE ON ALL OF THIS?

THE MEDIC

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Saturday, July 18th, 2015 AT 4:29 PM
Tiny
RIKPHRED
  • MEMBER
I'll check them out, thanks for the help. By the way, I love your Willy's, sweet.
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Saturday, July 18th, 2015 AT 7:34 PM
Tiny
CJ MEDEVAC
  • EXPERT
THANK YOU!

WHEN YOU START "KICKING BACK" A LITTLE, YOU OUGHTTA GET YOU ONE, HE'S SIMPLE, SLOWER, GEARED JUST RIGHT, ALMOST UNSTOPPABLE!

HE'S NOT QUITE A DAILY DRIVER, BUT CLOSE!

I DON'T STICK HIM IN SHOWS, I SHOW HIM RIGHT WHERE HE BELONGS, ON THE ROAD!

KEEP ME POSTED

THE MEDIC
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Saturday, July 18th, 2015 AT 7:53 PM

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