Rear end whine

Truckedup

Weekend Racer
Dec 15, 2008
64
0
0
Western NY state
The Posi carrier came from a Buick Regal,I have no idea what type it is.Probably be a good idea for me to pull the cover and check the back lash and gear wear pattern.Then fill it with non synthetic gear oil .
 

Truckedup

Weekend Racer
Dec 15, 2008
64
0
0
Western NY state
Ok,I got little else to do today so I pulled the rear cover.I wiped the oil off the gears and checked the backlash.it's .008,so it might be .001 more on really dry gears,that's reasonable.It's hard to see the wear pattern from the photo......it's postioned more towards the inside of the tooth and doesn't run off the tooth in any direction. That also seems good.I'm sure the pinion and carrier preload are ok as I took a lot of care setting it up as best I could being an amatuer at rear gears.
I suppose it's all ok and just button it up with new gear oil.
You can see the Posi, what kind is it besides adequate for the 240 HP 305 in the El Camino?
2228271810028817115S600x600Q85.jpg
 

LS6 Tommy

MalibuRacing Junkie
May 15, 2004
15,847
1
38
North Jersey
Truckedup said:
The Posi carrier came from a Buick Regal,I have no idea what type it is.Probably be a good idea for me to pull the cover and check the back lash and gear wear pattern.Then fill it with non synthetic gear oil .

If it's a stock diff, AFAIK synthetic is fine if you're not getting any posi clutch chatter, but if you are I personally would go with non-synthetic with the 3 oz. of friction modifier added per quart.

Tommy
 

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