Rear end oil
#3
Team Owner
If the car is used for street or occasional "spirited" driving, then something like every 50K miles should be OK.
As mentioned, it will have to be pumped out (get a cheap fluid pump from Harbor Freight) and the new oil will need to be pumped back in. Some parts stores sell gear oil with a pump already in the bottle.
Use a good grade of 80W-90 GL5 gear oil and a couple bottles of the GM posi additive. Some people like brands like Royal Purple or Amsoil, but for the most part, there is not need for anything special. I would not use a synthetic in the diff.
As mentioned, it will have to be pumped out (get a cheap fluid pump from Harbor Freight) and the new oil will need to be pumped back in. Some parts stores sell gear oil with a pump already in the bottle.
Use a good grade of 80W-90 GL5 gear oil and a couple bottles of the GM posi additive. Some people like brands like Royal Purple or Amsoil, but for the most part, there is not need for anything special. I would not use a synthetic in the diff.
#4
Slingshot
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wolfie1961 (10-07-2016)
#8
Slingshot
You can also get a kit for $80 which will allow you to drill and install a drain hole & plug on the lower portion of the differential. But even if you install the plug, you will need a way to inject the new oil into the differential. (see attached Word document).
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#10
I just pulled that pic from Autozone.com
But that thing is kinda small. Would probably be better to try and find a larger one.
Though, it would probably be a good idea to call the company first to see if it could pump gear oil. It just says an oil pump. So not sure what oil they are referring to.
But that thing is kinda small. Would probably be better to try and find a larger one.
Though, it would probably be a good idea to call the company first to see if it could pump gear oil. It just says an oil pump. So not sure what oil they are referring to.
#11
Safety Car
I used ramps and this hand pump to extract the old oil and inject the new oil. (see attached write-up)
You can also get a kit for $80 which will allow you to drill and install a drain hole & plug on the lower portion of the differential. But even if you install the plug, you will need a way to inject the new oil into the differential. (see attached Word document).
You can also get a kit for $80 which will allow you to drill and install a drain hole & plug on the lower portion of the differential. But even if you install the plug, you will need a way to inject the new oil into the differential. (see attached Word document).
#13
Instructor
Great article thank you very much for posting the PDF. I was wondering how to change the fluid. There is no drain plug like my truck has. I thought the whole cover needed to come off.
Thank you!!!!!
Thank you!!!!!
#14
Instructor
Member Since: Apr 2013
Location: NW Arkansas - usually winter in FL
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I use a garden sprayer to fill transmissions and final drives. Purchased it years ago from Tractor Supply for about ten bucks. Might be a couple of bucks more now.
Remove the spray nozzle, put the hypoid lube in it, pump it up a little and squeeze the handle. Works great. Way easier than a "thumb type" pump. Cost is not much more than a "bottle type" pump either.
Also use it to spray mineral spirits to clean areas that otherwise are inaccessible.
Clean it after each use to prevent deterioration to the plastic container. Better yet, get an older metal piece at a garage sale.
It's an excellent investment. Buy it now and it will last a lifetime - you'll thank yourself in the years ahead. LOL!.
Remove the spray nozzle, put the hypoid lube in it, pump it up a little and squeeze the handle. Works great. Way easier than a "thumb type" pump. Cost is not much more than a "bottle type" pump either.
Also use it to spray mineral spirits to clean areas that otherwise are inaccessible.
Clean it after each use to prevent deterioration to the plastic container. Better yet, get an older metal piece at a garage sale.
It's an excellent investment. Buy it now and it will last a lifetime - you'll thank yourself in the years ahead. LOL!.
Last edited by jake corvette; 04-06-2014 at 10:41 PM.
#17
Melting Slicks
Member Since: Jan 2014
Location: Downers Grove Illinois
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http://www.royalpurpleconsumer.com/products/max-gear/
Max Gear is formulated with a friction modifier additive – no additional additives are necessary.
Last edited by JimLentz; 10-03-2016 at 04:33 PM.
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JrRifleCoach (01-22-2018)
#19
Instructor