387k tahoe gets new diff - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**truckdude239** · 03-01-2021, 11:42 PM

Welp finally got tired of listening to the grinding ground of front diff on 387000 mile Tahoe. Picked up this beauty of a differential from local junkyard 22,000 documented miles on the truck will probably outlive the rest of the Tahoe looking forward to i stalling it ina few days

**Palf70Step** · 03-02-2021, 08:06 AM

richards72chevy · 03-02-2021, 11:14 AM

Was all them miles racked up on the original motor?

**truckdude239** · 03-02-2021, 04:10 PM

Quote:

Originally Posted by richards72chevy

Was all them miles racked up on the original motor?

it got a engine and transmission at 369k not suren if trans was orginal but engine was orginal trans was out of and egnine was leaking alot of oil and running poor so i just swaped both for a 150k units

**truckdude239** · 03-03-2021, 12:19 PM

Its in old had had alot of metal shards on drain plug also found my 15 mm swivel scoket I lost 3 year ago when I did engine swap can't believe it rode there that long

**hatzie** · 03-05-2021, 12:02 PM

That's never good to find on the drain plugs.

**biketopia** · 03-10-2021, 02:49 PM

Is your hoe a full time auto unit? The front diffs live and die by routine service on the full auto units. You can draw out the 2x4 units a little on fluid changes though. I had co-worker I had to put one in an escalade that looked even worse at 105k because he never changed the fluid.

**truckdude239** · 03-10-2021, 02:52 PM

Quote:

Originally Posted by biketopia

Is your hoe a full time auto unit? The front diffs live and die by routine service on the full auto units. You can draw out the 2x4 units a little on fluid changes though. I had co-worker I had to put one in an escalade that looked even worse at 105k because he never changed the fluid.

Mine does have an auto 4x4 option but I leave it in 2x4 if I'm not in ice or snow I got the truck at 369k so I dont know how well it had been serviced in the past

**biketopia** · 03-10-2021, 02:54 PM

Quote:

Originally Posted by truckdude239

Mine does have an auto 4x4 option but I leave it in 2x4 if I'm not in ice or snow I got the truck at 369k so I dont know how well it had been serviced in the past

You're good to go now, fresh fluid every 75-100k, if it lives that long and you're golden!

**truckdude239** · 03-10-2021, 02:56 PM

Yup I also filled it with synthetic amsoil 75w90 gearoil

**hatzie** · 03-11-2021, 11:35 AM

I use a laundry soap pump and clear hose on bottles of gear, manual transmission, and transfer case oil but Amsoil really has a good gimmick with the bags.

Warrens69GMC · 03-11-2021, 11:43 AM

Quote:

Originally Posted by hatzie

I use a laundry soap pump and clear hose on bottles of gear, manual transmission, and transfer case oil but Amsoil really has a good gimmick with the bags.

Valvoline has went to them as well

**hatzie** · 03-11-2021, 12:41 PM

Quote:

Originally Posted by Warrens69GMC

Valvoline has went to them as well

It's a really good idea. The packaging is likely a heckuva lot cheaper and it's a lot easier for the consumer to use. Winner all the way around
Even with the soap dispenser and hose it's still a pain in the neck to fill the diffs and transfer case on my 05.

03-01-2021, 11:42 PM	#1
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	387k tahoe gets new diff Welp finally got tired of listening to the grinding ground of front diff on 387000 mile Tahoe. Picked up this beauty of a differential from local junkyard 22,000 documented miles on the truck will probably outlive the rest of the Tahoe looking forward to i stalling it ina few days Attached Images __________________ 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

03-02-2021, 08:06 AM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,608	Re: 387k tahoe gets new diff __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

03-02-2021, 11:14 AM	#3
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,645	Re: 387k tahoe gets new diff Was all them miles racked up on the original motor?

03-03-2021, 12:19 PM	#5
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: 387k tahoe gets new diff Its in old had had alot of metal shards on drain plug also found my 15 mm swivel scoket I lost 3 year ago when I did engine swap can't believe it rode there that long Attached Images __________________ 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

03-05-2021, 12:02 PM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,912	Re: 387k tahoe gets new diff That's never good to find on the drain plugs. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

03-10-2021, 02:49 PM	#7
biketopia Senior Member Join Date: Jul 2015 Location: Warrenton VA Posts: 1,008	Re: 387k tahoe gets new diff Is your hoe a full time auto unit? The front diffs live and die by routine service on the full auto units. You can draw out the 2x4 units a little on fluid changes though. I had co-worker I had to put one in an escalade that looked even worse at 105k because he never changed the fluid. __________________ 71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350

03-10-2021, 02:56 PM	#10
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: 387k tahoe gets new diff Yup I also filled it with synthetic amsoil 75w90 gearoil Attached Images __________________ 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

03-11-2021, 11:35 AM	#11
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,912	Re: 387k tahoe gets new diff I use a laundry soap pump and clear hose on bottles of gear, manual transmission, and transfer case oil but Amsoil really has a good gimmick with the bags. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

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