Changing Diff oil, cheap easy trick
Thread Starter
Drifting
Joined: Jun 2005
Posts: 1,950
Likes: 498
From: Chino Hills CA
Changing Diff oil, cheap easy trick
After reading several threads about changing to Royal Purple in the differential to reduce gear, I put in on my mental list. While shopping with the wife at Smart and Final last week, I ran across a plastic pump dispenser that's used for flavored syrups. It would normally screw into the top of a bottle of syrup. Since that stuff's pretty thick, I went ahead and bought one for $2.99. It worked like a charm for removing diff oil through the fill hole. I just attached about 2 feet of 3/8" rubber hose to the pickup of the pump dispenser, and after jacking up the right rear and removing the wheel and fill plug, I was able to pump out 1 1/2 quarts from the diff. After the change, gear whine was reduced 50%.
Instructor
Joined: Dec 2004
Posts: 216
Likes: 1
From: Lapeer Michigan
I use Royal Purple oil & lube on every car & motor I have.
It doe's take away the gear noise from the rearend where as it don't bother anymore.
I just warmed the bottle up, put a long hose on it put it thru the plug to the rear of the housing and squeezed it in and the old lube came out the side of the plug hole into a pan. The old lube floats on top of the Royal lube so you don't have to try to drain it first.
I done 6 Vettes the same way and everyone was glad to get rid of the gear noise. It's well worth the $$ for the lube.
Sorry I had to put in my .2005 cents worth in, but it doe's work.
It doe's take away the gear noise from the rearend where as it don't bother anymore.
I just warmed the bottle up, put a long hose on it put it thru the plug to the rear of the housing and squeezed it in and the old lube came out the side of the plug hole into a pan. The old lube floats on top of the Royal lube so you don't have to try to drain it first.
I done 6 Vettes the same way and everyone was glad to get rid of the gear noise. It's well worth the $$ for the lube.
Sorry I had to put in my .2005 cents worth in, but it doe's work.
Instructor
Joined: Dec 2004
Posts: 216
Likes: 1
From: Lapeer Michigan
The vac would work but with the rearend lube warmed up a little it comes right out like oil on top of water thru the plug hole.
Use a long hose, the bottle should fit just above the rear tire or close.
I used a 3/8" hose, just squeeze it in slow& make sure the hose is at the rear of the gears.
Very easy to do, just takes time being carefull letting it flow out.
You would be supprised on the motor with the R P oil they advertise a 5% improvement in HP and have the dyno results to prove it.
I tried it and now IM hooked on it.
Same with Marvel Mystery Oil in the gas, and I add 1/2 qt to the oil when changing it.
Also a Ac PF 932 2 qt oil filter, it fits 1" above the oil pan and easier to install.
Puralator & Dusch make a 2 qt also.
My Dyna 44 took 1 1/2qts to fill.
http://www.royalpurple.com/index.html
Use a long hose, the bottle should fit just above the rear tire or close.
I used a 3/8" hose, just squeeze it in slow& make sure the hose is at the rear of the gears.
Very easy to do, just takes time being carefull letting it flow out.
You would be supprised on the motor with the R P oil they advertise a 5% improvement in HP and have the dyno results to prove it.
I tried it and now IM hooked on it.
Same with Marvel Mystery Oil in the gas, and I add 1/2 qt to the oil when changing it.
Also a Ac PF 932 2 qt oil filter, it fits 1" above the oil pan and easier to install.
Puralator & Dusch make a 2 qt also.
My Dyna 44 took 1 1/2qts to fill.
http://www.royalpurple.com/index.html
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Originally Posted by Tonys96
Cool idea...wonder if the 'ol Mighty Vac hand vacuum pump would work.
Yep. Works fine.
I would question whether some other product that is designed to pump edible fluids will stand up to something that is designed to pump petroleum products.
Gary
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Not to send in the black cloud, but the engineers at Eaton "strongly recommends" the use on conventional/mineral lubricants with their posi carriers.
Might want to reconsider the use of synthetics if you're running Eaton.
Might want to reconsider the use of synthetics if you're running Eaton.
Last edited by 73, Dark Blue 454; Mar 26, 2006 at 05:04 AM.
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