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George Davis Posted on Jun 10, 2014
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02 Silverado G80 differential is not locking according to the g code in my glove box I have a G80 differential but I have had my truck spining tires on road and off road my differential dose not lock in like it is supposed to what other way is there to tell if I have the right differential or not cause im assuming I dnt

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Dan Jacobs

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  • Cars & Trucks Master 808 Answers
  • Posted on Jun 11, 2014
Dan Jacobs
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Joined: Nov 05, 2013
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Remove differential cover and rotate carrier look in the area around the axle gear small teeth can be seen with little gears that come to a flywheel weight governor (g80) that spins and tightens the axle gears against the carrier creating posi. works only under power

5 Related Answers

Curt Downs

  • 1779 Answers
  • Posted on Nov 02, 2008

SOURCE: 2000 Toyota Corolla VE -- Glove Box Stuck

The most common cause is something inside the glove box jammed in the latch. Push glove box door release , and GENTLY insert a flat putty knife, plastic knife, or similar type tool in the groove of door, GENTLY try to pry open the door. U will probably (hopefully) find a napkin, map, or glove (does anybody actually put gloves in the glove box?) jammed in the inside latch. Let me know how u make out.

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Anonymous

  • 2 Answers
  • Posted on Jan 02, 2009

SOURCE: Mitsubishi Galant 2000 Glove Box Lock

First off you will need your key to the lock and a 1/8" flat blade screw driver.  Notice that your lock only turns 1/4 rotation, after doing this procedure you will be able to turn the lock an extra 1/4 turn counter clock-wise (when viewed from the front of the latch).

Turn the lock so it is vertical (perpendicular to the latch itself (counter clock-wise)).  Turn the latch around so you can view the back and the lock is to your left.  Above the lock there is a slot that you can put your screw driver into (not the indention in the metal).  You need to insert your screw driver and listen very closely, you should hear your screw driver hitting the metal latch.  Once you push the latch down with your screw driver, turn the lock another 1/4 turn with your key from the front (counter clock-wise looking from the front).

Once the lock has been turn a full 1/2 turn, you should be able to push the lock out from the back of the latch.

To put the lock in the new latch, you have to have your key in the lock.  Put the lock in the latch with the one pesky keep latch facing the handle used to open the glove compartment.  Once the lock is in the new latch, turn clock-wise until you can't anymore (1/2 turn).

You're done my friend!

Anonymous

  • 1 Answer
  • Posted on Feb 20, 2009

SOURCE: glove box, LOCK BROKEN IN LOCK POSITION

If the glove box is anything like mine it is a modular piece assembled with screws.... let them break the handle.. get a replacement first from a junk dealer and have the broken part swapped out. Its like a seat belt catch in my 97 deville. The glove box in mine flopped open and the catch had broken and fell down the door of the glovebox itself. The whole door is assembled with philips screws and should be easily removed and a new latch put in.. whoever does it should not cost more than 50.00 in labor MAYBE unless you have a friend that would do it for a beer. I saw a complete glove box on ebay for 40.00 shipping ontop of that .. i saw the latch for 20.00 +shipping.

Molson02536

Harvey N Tawatao

  • 3854 Answers
  • Posted on Jun 29, 2009

SOURCE: Safty lock for spare tire on 2003 chevy silverado

Check your owners manual .There is a saftey catch that will need to be realased by using your bottle jack and tire stops that come with your truck. If you dont have a owners manual. What you can try is taking a floor jack and a socket place it under the spairtire right in the center where the cable holds the tire in place. start jacking it up until the socket hits the square part in the center once the socket is aligned with the square part continue to jack up it should release it . Its a stupid system but it will work if the cable wont allow the tire to drop. good luck and keep me posted.

Anonymous

  • 11 Answers
  • Posted on Jul 15, 2009

SOURCE: How do you remove and replace the key lock cylinder in glove box

open box ull see 3 screws

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WHY DOES MY 2004 BUICK RAINIER'S REAR END GRAB WHEN TURNING ?

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NHTSA ID#10024345
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When my 02 silverado 2500hd is in 4x4 the tires are locked and the truck won't move until I shift back to 2hi. Differential or Encoder Motor?

You can take this with a grain of salt but I am a junior in high school taking auto mechanics and my teacher use to work for a chevrolet dealership where they had a geo tracker come in because it would drive fine until placed in 4 wheel drive. Once placed in 4 wheel it would not move because front and rear differentials were geared differently from factory causing the wheels to lock up. If it has never been able to go into 4 wheel since you have owned it I hope this will help...
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I have noticed a clunk type noise/feel in the rear end after taking off from a stop. Tonight a really bad grinding/clunking sound both in drive and reverse, ion gear or neutral. I've been reading...

if the diff is not leaking oil there should be no reason to be low. If you hear a noise in neutral with the truck not moving, its not in the rear end. it may be the trans or transfer case.
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What type of fluid do i need to put in the rear end and how do I know if it is a limited slip

Hi, you could use 75 weight synthetic fluid, and if you have limited slip, there will be a label in your glove box, with option codes stating G80. If you do not have G80, then you do not have limited slip. Thanks...Coop
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Rear differential diagram

my 2003 silverado z71 rear end is stamped 8.8 on the axle is a 8.8 or a 8.5 ? 5.3l 3.73 gears g80 locker
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Determine rear axle type (example 4:11)

the build sheet codes are affixed inside the glove box
It will have the letter G with two numbers after it as like G80. Some may have two letters and one number but unlikely so
The G code will determine the ratio of yours without ripping off the rear cover to count the teeth and divide what you have
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Want to change gears in rear end for posi traction in a 98 gmc25000 is this possible?

It is possible, you just have to know what gear ratio you have in your Sierra. I had issues with my son's rear differential and did the Salvage Yard and picked one up for $250.00 with less then 45,000 miles. Remember new cars end up at Salvage Yards also.

Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi

Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

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Can the gears be changed from 4.11 to 3.7 w/o changing rear end?

Yes, you can leave the axle housing installed, but you will have to pull the axle shafts. You will likely have to purchase a specialty tool to do this.

(If you have the massive drums found on the 3500s and some 2500's, this would also be a good time to re-grease your bearings and check your rear brake shoes and change them if worn beyond 50%, since you will have the axle ends taken apart. These drums are very heavy. Do not remove the trapped bearing from the drum.)

To go from 4:11 to 3:73, You only need to swap out the gears in the differential (including the pinion gear) Be sure to check for proper alignment and backlash. Re-install axle shafts. Replace, do not reuse any seals. You may also need to reprogram the trucks shift points for the new gear ratio to maximize efficiency results.

Note: By changing your gear ratio to 3:73 You may potentially decrease your trucks Towing/Hauling weight capacity. Many GM trucks are equipped with an Eaton mechanically locking rear (RPO code: G80). You can find out if yours is so equipped, by checking the label inside the glove box. Personally I prefer the G80.

(I have the 3:73s in My '97 C2500 and average around 10.5MPG city, but long freeway runs can hit 15+MPG. My GVW is 8600LBS, and 10,000LBS Towing capacity. "Stop & Go" driving is your worst enemy with these trucks.)

Consider if all the work involved is worth it in performance gains before going forward.
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96 chev s-10 rearend

This is normal for an open differential.The tire with the least resistance will spin. Check your glove box options code list and look for G80, this is the option for limited slip diff.
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Diff lock

look in the glove box there will be a white decal with a bunch of codes see if g80 is on there this is locking diff code
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