changing diff fluids in 87 front and rear is 89021671 gm fluid correct? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

weider1717 · 02-20-2013, 09:46 PM

I have heard it is correct but not for both front and rear this correct? and mine does not have the G80 limited lock option so I don't need the additive correct? thanks

BLE 'BURBAN · 02-21-2013, 01:38 AM

This past December I serviced both axles using GM's Synthetic 80w90 gear oil. Part # 88900401. It ain't cheap @ $35.00 a qt. and 3 qt's per axle but I figure since it's what GM recommends for the majority of their vehicles these days I might as well go ahead and upgrade to it.

Oh did I mention I work in the parts dept of a GM dealership?

02-20-2013, 09:46 PM	#1
weider1717 Registered User Join Date: Apr 2011 Location: greenville sc Posts: 558	changing diff fluids in 87 front and rear is 89021671 gm fluid correct? I have heard it is correct but not for both front and rear this correct? and mine does not have the G80 limited lock option so I don't need the additive correct? thanks

02-21-2013, 01:38 AM	#2
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: changing diff fluids in 87 front and rear is 89021671 gm fluid correct? This past December I serviced both axles using GM's Synthetic 80w90 gear oil. Part # 88900401. It ain't cheap @ $35.00 a qt. and 3 qt's per axle but I figure since it's what GM recommends for the majority of their vehicles these days I might as well go ahead and upgrade to it. Oh did I mention I work in the parts dept of a GM dealership? __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade



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