14 Bolt rear end fluid??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hoodup · 04-04-2010, 09:50 PM

Hey guys, want to change the Lub in my 14 bolt 4:10 rear but not sure if I need the limited slip additive? It's a 68 gmc short with mid 70's running gear. What do ya think?

Jacfourteen · 04-04-2010, 10:01 PM

does it have posi? If so it needs the additive, if not no.

hoodup · 04-04-2010, 10:09 PM

This may sound dumb but I'm not sure if its posi or not!!

Blazer1970 · 04-05-2010, 06:02 AM

No, AFAIK there is no such thing as a posi for the 14 bolt. You never use limited slip additive in that axle. You do not use the additive with an Eaton Automatic Locker (gov-lock).

cdowns · 04-05-2010, 06:52 AM

synthetic gear oil is good

04-04-2010, 09:50 PM	#1
hoodup Registered User Join Date: Mar 2010 Location: bozeman, mt Posts: 88	14 Bolt rear end fluid??? Hey guys, want to change the Lub in my 14 bolt 4:10 rear but not sure if I need the limited slip additive? It's a 68 gmc short with mid 70's running gear. What do ya think? __________________ Just cause my Hood is up every weekend doesn't mean its broke down!!

04-04-2010, 10:01 PM	#2
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: 14 Bolt rear end fluid??? does it have posi? If so it needs the additive, if not no. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

04-04-2010, 10:09 PM	#3
hoodup Registered User Join Date: Mar 2010 Location: bozeman, mt Posts: 88	Re: 14 Bolt rear end fluid??? This may sound dumb but I'm not sure if its posi or not!! __________________ Just cause my Hood is up every weekend doesn't mean its broke down!!

04-05-2010, 06:02 AM	#4
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: 14 Bolt rear end fluid??? No, AFAIK there is no such thing as a posi for the 14 bolt. You never use limited slip additive in that axle. You do not use the additive with an Eaton Automatic Locker (gov-lock). __________________ Tim

04-05-2010, 06:52 AM	#5
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: 14 Bolt rear end fluid??? synthetic gear oil is good __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY



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