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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: Destro on June 15, 2006, 03:40:00 am

Title: NP 203...additive in axles?
Post by: Destro on June 15, 2006, 03:40:00 am

Hello, Since I have the full time 4 wheel drive,do the axles require the GM additive when replacing the diff fluid??
Thanks

Title: Re: NP 203...additive in axles?
Post by: roundedline on June 15, 2006, 01:07:00 pm

Transfer case doesn't determine additive, the prescense of a limited slip does.

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project

Title: Re: NP 203...additive in axles?
Post by: Destro on June 16, 2006, 01:15:00 am

Does the NP203[full-time] system use limited slip axles?
That's what I was wondering

Title: Re: NP 203...additive in axles?
Post by: Blazin on June 16, 2006, 04:47:00 am

Limited slips could have been ordered with full time or part time. The tranfer case dosn't determine open or limited slip diferentials. If you are changing the fluid you will be able to tell if it is open or limited slip by looking at it. If you are just topping it off I don't think a litle bit of strait 80/90 will hurt a limited slip. Limited slip additive wont hurt an open diferential either.