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81 Diff Fluid

Old Jul 3, 2006 | 07:01 AM
  #1  
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JustForFun
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Default 81 Diff Fluid

i am planning on serving the diff on my 81 tonight. Need couple ?`s answered.

1. is there a drain plug, or does it have to be sucked out?

2. what fluid should i use to go back?

3. Will i need the slip-additive?

4. How much fluid will i need?

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Old Jul 3, 2006 | 07:54 AM
  #2  
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1 - You'll need to suck it out.

2 - I'm running Schaeffer's 267. It's a climbing oil with the posi additive. Folks with AWD setups recommend it to lower gear noise. It has helped the vette a bit in that regard. http://www.schaefferoil.com/gear_oils/267.html

3 - Yes

4 - That I don't know because I had my mechanic change it while the car was in for other service. (The mechanic had trouble locating the Schaeffer's and needed to order it from out-of-state.)
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Old Jul 3, 2006 | 07:56 AM
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2 qts. GM axle lube,2 conntainers of GM posi additive(put the additive in first---start suckin -no plug
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