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Old 06-01-2018, 07:36 PM   #1
Macdaddy1
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Cleaning Rear Differential

Is it ok to spray brake cleaner on my rear diff to clean them before installing the cover and new gasket?
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Old 06-01-2018, 08:16 PM   #2
mongocanfly
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Re: Cleaning Rear Differential

are you talking about the carrier and r&p?or just the diff cover?....I use brake cleaner as a parts cleaner all the time....evaporates quickly
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Old 06-01-2018, 08:21 PM   #3
Killer Bee
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Re: Cleaning Rear Differential

you can wipe the flange and inch or so of the inner housing with brakleen on a lint free cloth, it will dry quickly..

or spraying just the flange and blowing a little low pressure shop air will work..

I wouldn't sweat a little overspray but I wouldn't deluge it where any elastomers like pinion seals or air/elec locker components could be affected..

make sure to clean bolt holes really good, leftover oil in there can squeeze out across seal area when tightening bolts..

If you're having trouble keeping oil from dribbling down the lower edge, you can jack up the rear end so the oil stays up forward until cover is set and secured..

you can also spread a small bead of grease along the low places to hold oil back..

good luck!

now, waiting for gasket vs rtv argument to start in 3... 2.. 1.
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Old 06-01-2018, 08:32 PM   #4
Macdaddy1
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Re: Cleaning Rear Differential

I was talking about the carrier and R & P. I am ordering a new cover and gasket. Just wanted to clean the inside before assembling but did not want to damage anything with the brake cleaner.
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Old 06-01-2018, 08:59 PM   #5
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Re: Cleaning Rear Differential

Also where is the silly fill hole?
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Old 06-01-2018, 09:12 PM   #6
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Re: Cleaning Rear Differential

On the right side about half way up and about 5 inches behind the pinion. I don't spray a bunch up inside.
Jimmy
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Old 06-01-2018, 10:32 PM   #7
Macdaddy1
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Re: Cleaning Rear Differential

OK located it thanks. The passenger side axle has a code HA 216 W does anybody know what that refers to. I can't find anything on the web.
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Old 06-01-2018, 11:04 PM   #8
Killer Bee
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Re: Cleaning Rear Differential

what's your question? what axle you have? or just what those numbers mean?

can you post a picture(s)? either way it'd be a lot easier if we all knew what axle it is..

I posted some Dana stuff here http://67-72chevytrucks.com/vboard/s...48&postcount=8

there's a chart in there and many other places on the interwebs to help you identify it..
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Old 06-02-2018, 10:23 AM   #9
Macdaddy1
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Re: Cleaning Rear Differential

Killer bee

I was trying to ask what axle this has and whether it might be posi. I will take some pics later today.

Thanks
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Old 06-02-2018, 12:25 PM   #10
mongocanfly
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Re: Cleaning Rear Differential

the codes on the outside of the axle won't dictate what's in the housing ir what's been swapped over the yrs....pics would be best...but if you look in the carrier and can see the side gears ,cross pin, and bevel gears its a open diff......this is a open diff...
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1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
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Old 06-02-2018, 12:34 PM   #11
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Re: Cleaning Rear Differential

this is a g80 locker.....
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Mongo...aka Greg

1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
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Old 06-02-2018, 07:20 PM   #12
Macdaddy1
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Re: Cleaning Rear Differential

Thanks Greg

I took the rear diff cover off and found out it has 3.73 gears and no posi. I needed to replace the pinion seal and had a beast of a time trying to break it loose but I finally got it. I think I better order a new pinion nut though. Hey Greg, When you get time you you please take a pic of your zbar linkage. I just got the bracket from advanced adapter but I am not sure it will be long enough. If i could see yours it would really help.

Thanks
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