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Old 04-01-2011, 11:31 AM   #1
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Default How long will diff's last...

...untouched!? I did a full season without refilling last year (I do minimal 8th as I mainly do 10th elec), I checked one of the diffs at seasons end and it wasn't leaking at all, so will the oil inside still be ok? Or at least still there even if may the viscosity has changed? Or am I probably murdering the gears??
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Old 04-01-2011, 11:45 AM   #2
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The oil will be bad. Clean, inspect, refill.
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Old 04-01-2011, 02:08 PM   #3
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I usually change mine every 4 races.
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Old 04-01-2011, 02:10 PM   #4
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Ive heard that the rule of thumb is every 2 hours of driving on them so I go with that.
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Old 04-01-2011, 02:12 PM   #5
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I do mine every gallon and there nasty. I'd hate to see a whole season.
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Old 04-01-2011, 02:13 PM   #6
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Quote:
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I usually change mine every 4 races.

+1 mine are usually pretty black by then
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Old 04-01-2011, 03:23 PM   #7
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So if they aren't black or have specs from the metal on metal the oil should still be good then, right? I refill only when the outdrives are getting a not as tight feel to them. I also check the fluid by opening the diffs up and taking a sample of it out to inspect the diff fluid for anything that would require a change. I can go for a couple of months without changing them out unless a seal or o ring goes on it. How much does a silicon based diff fluid actually break down or does it?
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Old 04-01-2011, 03:35 PM   #8
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I do mine every gallon and there nasty. I'd hate to see a whole season.
good rule of thumb every gallon for me sometimes more for tuning.
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Old 04-01-2011, 04:11 PM   #9
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Cheers all, should clarify, it's all being done after this next meeting anyway, I have a new chassis/drivetrain etc for Neo so will have to get all the diffs out then anyway! I'm not fussed getting through this meeting with not ideal handling, it's whether I'm likely tomchew gears or actually break anything I'm worried about?
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Old 04-01-2011, 06:33 PM   #10
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So if they aren't black or have specs from the metal on metal the oil should still be good then, right? I refill only when the outdrives are getting a not as tight feel to them. I also check the fluid by opening the diffs up and taking a sample of it out to inspect the diff fluid for anything that would require a change. I can go for a couple of months without changing them out unless a seal or o ring goes on it. How much does a silicon based diff fluid actually break down or does it?
Dumb question, but if you are going through all the trouble to take the diffs out and check them why not just replace the fluid at that point. Just curious...
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Old 04-01-2011, 07:43 PM   #11
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Why would I replace the fluid if it's still in good condition? I do a tear down of my vehicles after practice and race days to clean and check everything over, if the diff fluid is clean and not a brown or black color I see no reason to have to replace. If it runs great with the fluid I have in there why would I need to waste money replacing it, I'm not cheap but if you don't have the money to replace the fluid after each practice day or race day why bother unless you absolutley have too. I do check for leaks and clean them up before removing the gear and to just check them and if it needs replacing I do that.
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Old 04-01-2011, 10:32 PM   #12
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Why would I replace the fluid if it's still in good condition? I do a tear down of my vehicles after practice and race days to clean and check everything over, if the diff fluid is clean and not a brown or black color I see no reason to have to replace. If it runs great with the fluid I have in there why would I need to waste money replacing it, I'm not cheap but if you don't have the money to replace the fluid after each practice day or race day why bother unless you absolutley have too. I do check for leaks and clean them up before removing the gear and to just check them and if it needs replacing I do that.
That makes sense, I was just wondering. I am the lazy wencher...lol If I go through that much work (which it really isn't that much work) then I just go ahead and replace the fluid.
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Old 04-01-2011, 11:44 PM   #13
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No problem I love wrenching on my buggy and truggy. I also check everything over and if it's good I bolt it back up and keep it. I could see changing it all the time but if it's good to go I put it back together and spend the little bit of money on tires if I need them. I also race on the same track all the time, if I had the money to travel to different tracks I would just buy a bunch of new diffs and fill them up with different viscosities of oil and change them as I need them or just back ups. Everyone has there own ways or secrets.
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Old 04-01-2011, 11:46 PM   #14
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That makes sense, I was just wondering. I am the lazy wencher...lol If I go through that much work (which it really isn't that much work) then I just go ahead and replace the fluid.
+1 on that
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Old 04-02-2011, 12:48 AM   #15
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I like to fully break down my whole car every three outings or race weekends. Clean and inspect things for cracks. Although I do pretty good visual inspections during those three outings. It just seems when you break down the car,clean everything,check and lube bearings and refresh oils that it's kind of like having a new car againor as close to it as you can get.
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