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02-19-2010, 04:52 PM
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#1 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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2000 sierra 4wd rear posi question
so yesterday i was pullin away from the curb in 2wd and the right side rear was sittin in a buch a snow, and it just sat there spinnin. Trucks got about 87k on it i think, do these posi units give out or somethin? couldnt get the truck to move, had to put it in 4 wheel. any thoughts?
Brad
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2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-19-2010, 05:07 PM
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#2 |
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Registered User
Join Date: Sep 2008
Location: wyoming pennsylvania
Posts: 88
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Re: 2000 sierra 4wd rear posi question
First off does it have the G80 option. Check the sticker in the glove box. Or if you got it used maybe the rear was changed at some time. It is possible that it needs a fluid change to "clean out" the clutch packs. The Eaton type of diffrential does have clutch packs and a lot of little parts that can get "gummed up"
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02-19-2010, 06:46 PM
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#3 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
Ok thanks, ill check the code, and my dad bought it new and then i bought it off him, so i kno the diff has never been touched. Ill check the code and get back.....
thanks again brad
__________________
2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-20-2010, 02:11 AM
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#4 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
So i do have the G80 option, so im gonna try and see if its the fluid. Whats the easiest way to change it? do i have to remove the pumkin cover like on the older trucks?
Brad
__________________
2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-20-2010, 08:06 AM
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#5 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: 2000 sierra 4wd rear posi question
yes. but remember just because you have posi doesn't mean your not going to get stuck. if you change the fuild please go to gm and get the fuild and special additave for the posi rear ends
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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02-20-2010, 09:13 AM
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#6 |
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Senior Member
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
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Re: 2000 sierra 4wd rear posi question
Doesn't sound right for a failure at 87k. You have a locker rear axle....should have gotten the traction to both wheels equally, was the other wheel on dry pavement?
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Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. |
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02-20-2010, 04:02 PM
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#7 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
Well im not saying i wont get stuck, but like gray ghost asked, yes the other tire was on dry pavement, and was not moving at all, i was watching it while the other was just sitting there spinning....I would most likely get the service done at the dealer as i have never really done anything on rear ends before...
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2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-20-2010, 04:07 PM
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#8 |
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Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: 2000 sierra 4wd rear posi question
It's easy to change the fluid...pull the cover, use black RTV for a new seal... there will be one fill plug that gets removed and filled back up to that line...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
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02-20-2010, 05:23 PM
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#9 |
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Senior Member
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
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Re: 2000 sierra 4wd rear posi question
I just thought about the fact that your G80 might be a limited slip. You can tell the difference...the locker makes a noise and a clunk when it locks up, limited slip is usually very quiet. If you had a limited slip there's probably nothing wrong with it....you were just stuck.
__________________
Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. |
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02-20-2010, 05:54 PM
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#10 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
Hm weird, i also tried it in my driveway quick, which had snow on both rear tires, and still only one went, but it did switch sides in the beginning, so i guess it is still kinda workin, haha.
Brad
__________________
2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-21-2010, 08:49 PM
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#11 |
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Watchin the rust grow
 
Join Date: Oct 2008
Location: Western Nebraska
Posts: 950
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Re: 2000 sierra 4wd rear posi question
Sounds like a limited slip if it changed.
__________________
1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done  2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold
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02-22-2010, 02:00 PM
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#12 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
ok cool, so is there any other way i can tell if its a limited or a locker without takin off the diff cover?
__________________
2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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02-22-2010, 04:36 PM
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#13 |
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Senior Member
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: 2000 sierra 4wd rear posi question
call the delaer and have them run the vin number they should be able to tell you whats in there
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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02-22-2010, 05:10 PM
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#14 |
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Senior Member
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
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Re: 2000 sierra 4wd rear posi question
Let us know what you find out.
__________________
Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. |
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02-22-2010, 05:15 PM
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#15 |
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Registered User
Join Date: Oct 2006
Location: Elgin, IL
Posts: 658
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Re: 2000 sierra 4wd rear posi question
Will do, thanks guys.
__________________
2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______|_|__\____ ..-..~.|_(O)__|_|__|_(O)] |
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