06-18-2011, 12:06 AM
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#1
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Join Date: Apr 2011
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Differential Fluid
So, my mom called me telling me that her 99 4runner was shifting hard when switching from park to reverse and drive. I checked the differential and has a major leak. To top it off, The filler plug is completly stripped. Tomorrow i'm heading to the stealership and pick up the filler plug and two crush washers. Now, what gear oil should i use? I'm going to get conventional but don't know what weight to get. Should i get 75-90 or go thicker? 4runner has 189k miles
Last edited by Mano1124; 06-18-2011 at 12:31 AM.
Reason: Forgot the mileage
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06-18-2011, 12:59 AM
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#3
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. -Kenny- (formerly icantsee) .
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06-18-2011, 03:22 AM
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#5
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Quote:
Originally Posted by Singtoe
If you want to keep your diffs alive, don't run synthetic...
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What's your rationale for that?
I've run Synthetic (Mobil 1 or Redline) in every diff I've owned or worked on for twenty years. No excess wear issues, or leaks with any of them.
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06-18-2011, 03:55 AM
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#6
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Join Date: Apr 2011
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Join Date: Apr 2011
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Real Name: Manolo Rodriguez
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Sorry guys. Just had time to check the thread. My mom told me she's looking into a 02 4runner right now. So i'm thinking of going conventional. Just wondering what weight. I too have a 99 4runner. Same color same model but with 155k miles. Im thinking of switching my trans, diff, and motor to synthetic. Just want to do a quick fix on my moms. The leak is actually on the filler plug.
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06-18-2011, 08:16 AM
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#7
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Quote:
Originally Posted by 02SE
What's your rationale for that?
I've run Synthetic (Mobil 1 or Redline) in every diff I've owned or worked on for twenty years. No excess wear issues, or leaks with any of them.
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There is no rationale for that, synthetic is far superior in every way.
If anything you would have less leaks and certainly less wear.
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Last edited by Nunyabiz; 06-18-2011 at 09:16 AM.
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06-18-2011, 08:19 AM
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#8
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Quote:
Originally Posted by Mano1124
Sorry guys. Just had time to check the thread. My mom told me she's looking into a 02 4runner right now. So i'm thinking of going conventional. Just wondering what weight. I too have a 99 4runner. Same color same model but with 155k miles. Im thinking of switching my trans, diff, and motor to synthetic. Just want to do a quick fix on my moms. The leak is actually on the filler plug.
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For what you are doing Singtoe is correct the 85W 140 would work very well for that purpose.
But definitely change the fluids on yours to full synthetic though.
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06-18-2011, 09:22 AM
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#9
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Alright, cool guys. So when it's time to drain and fill my differential, with no leaks, what weight of synthetic should i use and how many quarts does it take?
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06-18-2011, 10:18 AM
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#10
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Quote:
Originally Posted by Mano1124
So, my mom called me telling me that her 99 4runner was shifting hard when switching from park to reverse and drive. I checked the differential and has a major leak. To top it off, The filler plug is completly stripped. Tomorrow i'm heading to the stealership and pick up the filler plug and two crush washers. Now, what gear oil should i use? I'm going to get conventional but don't know what weight to get. Should i get 75-90 or go thicker? 4runner has 189k miles
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I'm curious why nobody has mentioned that your issue of hard shifting has nothing to do with the differential?? You need to check the transmission fluid and change THAT.
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06-18-2011, 10:27 AM
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#11
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Also grease the zerk fittings on the driveshaft, sometimes those joints get sloppy with no grease in them and can cause it to shift hard from park to drive and reverse.
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1985 4runner 22re solid axle 5 speed 5.29's
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06-18-2011, 12:09 PM
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#12
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Quote:
Originally Posted by K.C.
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Quote:
Originally Posted by Mano1124
Alright, cool guys. So when it's time to drain and fill my differential, with no leaks, what weight of synthetic should i use and how many quarts does it take?
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That post has all the information you need for amount required and torque. I run Mobil1 in my vehicle. However, I have seen a few post about Redline. But, it's not available locally so I didn't purchase it. Maybe I will later.
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06-18-2011, 01:04 PM
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#13
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Join Date: Apr 2011
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Member
Join Date: Apr 2011
Location: Brownsville, TX.
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Real Name: Manolo Rodriguez
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Cool. I'm off to the dealership. I'll check the tranny fluid too. Hopefully nothing expensive repairs are not in my future. Wish me luck!
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06-18-2011, 01:04 PM
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#14
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Unless you have a posi rear end I wouldn't waste the money on synthetic gear oil. If its that big a concern to you just change it more often. Chances are the fluid in your moms car has never been changed. Diff fluid is the most commonly ignored fluid. But rear ends are the longest lasting component of the drive train because they always have plenty of lubrication. I run conventional 85w-140, but its not that big a deal. Even my 38 Cadillac has an original rear end with conventional oil.
On my runner I changed it when I bought it at 113,000 miles. I now have 225,000 and haven't changed it yet.
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06-18-2011, 01:25 PM
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#15
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Join Date: Apr 2011
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Real Name: Manolo Rodriguez
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Join Date: Apr 2011
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Thank Tomsriv.
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