Mechanics

REAR DIFF QUESTION

2002 Chevrolet Silverado • 130,000 miles

Hey,

I am going to be doing a rear diff fluid change on my 2002 Chevy Silverado 1500 4wd. I know that the ring gears come in 10 1/2" and 9 1/2" sizes. How do I find out which one I have?

Also, if I have a posi rear end is there anything special I have to do when I put in the new fluid?

I am not sure if I have a posi rear end. How will I find out?

Thanks I appreciate your help
Avatar
OnEaglesWings
April 2, 2012.




Remove the cover and you can measure the ring gear.

Make sure you use the correct fluid in the diff with the correct additive for positraction.

Roy

IF I INSTALLED YOU INFO IN THIS SITE CORRECTLY (CHECK ME OR RE-INSTALL)

IF YOU CLICK INTO EACH ONE OF THESE AND VIEW "DETAILS"---MOST TELL WHAT RING GEAR (RG) SIZE IS IN THE DIFFMERELY LOOKING AT THE GASKET SHAPE AND COUNTING BOLT HOLES MAY GET THE INFO YOU WANT WITHOUT DIS-ASSEMBLY

AS FAR AS "DO I HAVE" OR "NOT HAVE" POSI?

THIS COULD VARY FRONT AND REAR (AT LEAST ON JEEPS AND TRUCKS I KNOW) CHECK BOTH ENDS!

JACK THE FRONT UP AND/ OR BACK UP--OR ONE AT A TIME

INSURE YOU ARE IN NEUTRAL--E-BRAKE IS OFF. BE SAFE!

SPIN A WHEEL---IF THE OPPOSITE WHEEL SPINS THE OPPOSITE DIRECTION. YOU HAVE A STANDARD DIFFERENTIAL

IF THE OPPOSITE WHEEL SPINS THE SAME DIRECTION AS YOU ARE TURNING THIS ONE---YOU HAVE POSI. CORRECT ADDITIVE AND VOLUME MUST BE USED

BEING THIS IS 4X4--YOUR HUBS (IF APPLICABLE ON THIS RIG) WILL NEED TO BE LOCKED IN IN ORDER TO MAKE THE OPPOSITE WHEEL MOVE

SORRY--I'M A JEEP CJ KINDA GUY, I DON'T KNOW YOUR SYSTEMS EXACT OPERATION

IF YOU DO HAVE POSI--AFTER YOUR FLUID CHANGE

IF ALL IS GOOD IN THE FLUID DEPARTMENT, SOMETHING THAT WILL AID IN LUBRICATING THE CLUTCHES (KEEPS POPPING NOISES DOWN) IS: FIND AN ABANDONED PARKING LOT,

DRIVE IN REALLY TIGHT FIGURE "8s"

OVER AND OVER (ON A PREVIOUS CJ I HAD, IT TOOK MAYBE 10 "8s")

YOU DO NOT HAVE TO GO FAST. JUST WHAT YOU ARE DOING, WILL DRAW PLENTY ENOUGH ATTENTION. YOU MAY BE EXPLAINING "THE DEAL", TO AN OFFICER, AS I HAD TO DO!

DOING THIS AT NIGHT SORTA MAKES IT LOOK LIKE YOU ARE RECKLESS!--YOUR HEADLIGHTS SORTA MAKE IT LOOK WORSE THAN IT IS!

LET US KNOW HOW IT GOES

THE MEDIC

CJ MEDEVAC
Apr 3, 2012.
Check you RPO codes located on your glovebox and it should tell you what you have G80 for locking diff a G80 does not require a friction modifier so a good synthetic gear oil of correct wt. Should do. As far as ring size a 1500 should have a 8an3/4" ring gear. Doing the figure eights sound much more fun though.
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Tiny
Gascap
Jul 19, 2012.

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