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rear end

Old 04-19-2013, 08:57 PM
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Hi All: Just read an article in the latest issue of Popular Mechanics re: changing rear differential fluid. I've had many cars over my 60+ yrs of driving.I don't remember ever changing fluid in any of them,and never had a problem. Maybe it's me or have I just been lax in the maint. dept and been very lucky? I've always maintained my vehicles by my self (must admit at 75 it's getting a little more difficult). My question to you all,do you change rear end lubes and /or front diff.? thanks for your input,jerrops
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Old 04-19-2013, 09:05 PM
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If it's a posi axle I change the fluid every other year and replace the additive. If it's an open diff, I'm a bit lax with them. I've changed the fluid in my Cherokee axles twice. Once at 100K, again at 200K. Seems to have been sufficient.
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Old 04-19-2013, 09:24 PM
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Only changed my rear diff fluid when I did a disc brake conversion. Had to drain it so I figured for $20 or so I might as well put new stuff in.
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Old 04-20-2013, 12:37 AM
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I bought my jeep with 260k and beat the ever living crap out of my rear diff. Then changed the oil and it was black, I figured it had never been changed but it didn't seem to make a difference when I changed it
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Old 04-20-2013, 01:24 AM
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Kind of depends if it see mostly road you can be pretty relaxed with it. If you are going threw deep water a lot you need to change it often
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Old 04-20-2013, 06:56 AM
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Factory recommendation is every 30K miles.
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Old 04-20-2013, 08:15 AM
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Originally Posted by cruiser54 View Post
Factory recommendation is every 30K miles.
Really?
I'm like the OP.
I've only changed it when I had it open for some reason. EVER.
I can only remember breaking a rear end once. And I'm pretty sure it was fubared before I got it.
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Old 04-20-2013, 09:14 AM
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Anytime I buy used vehicle I change all the fluids in it (except auto trans) so I know they HAVE been changed and also to get a look at the fluids that come out of it. Then I'll change the t-case/axles again every couple years or so.

If it was an off-road rig (deep mud / hard playing) then yes, I'd change them all much more frequently.

...
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Old 04-20-2013, 09:35 AM
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I do it every 4th oil change. Usually the mid-summer oil change. Full synthetic in the rear 8.25 and semi-syn in the front.

I gotta regear now due to my 31s. lol
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