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Lube, or no lube?

Lube, or no lube?

Old 02-07-2022, 10:03 AM
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Default Lube, or no lube?

I had to replace my rear bulkhead (broke it) last week. When I was at the shop getting parts, the guy told me to be sure to make sure I lube the rear differential - as it will be exposed during the repair process.

OK, fine, that makes sense to me.

But a few days earlier, when I was there getting a center diff to replace the broken slipper clutch, I asked if I needed to lube the pinion and spur gears (guessing at these names, but the one spun by the engine and the driveline gear it meshes with), and was told no. This is interesting to me, because they are ALSO metal on metal.

So what's your verdict? Should these gears be lubed too?
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Old 02-07-2022, 10:56 AM
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Originally Posted by AlaskaGuy View Post
I had to replace my rear bulkhead (broke it) last week. When I was at the shop getting parts, the guy told me to be sure to make sure I lube the rear differential - as it will be exposed during the repair process.

OK, fine, that makes sense to me.

But a few days earlier, when I was there getting a center diff to replace the broken slipper clutch, I asked if I needed to lube the pinion and spur gears (guessing at these names, but the one spun by the engine and the driveline gear it meshes with), and was told no. This is interesting to me, because they are ALSO metal on metal.

So what's your verdict? Should these gears be lubed too?
On the center No. It's open to the elements and will get gooped up quickly. The FR/RR Diffs yes a mild amount not doused
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Old 02-07-2022, 10:59 AM
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Originally Posted by Vtwnpwr View Post
On the center No. It's open to the elements and will get gooped up quickly. The FR/RR Diffs yes a mild amount not doused
I would post a picture if I could - but this center diff is enclosed. It's a Slash 4x4.
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Old 02-07-2022, 11:50 AM
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the pinion and spur usually dont get lube ive seen others lube those gears with some type of lube dry or eve a micro lubricant. the spur n pinion are considered open.and replaceable
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Old 02-07-2022, 12:10 PM
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Originally Posted by the rc guy View Post
the pinion and spur usually dont get lube ive seen others lube those gears with some type of lube dry or eve a micro lubricant. the spur n pinion are considered open.and replaceable
I could do some dry graphite lube. I have some of that here.

I did spray some WD-40 on it though - it's all rusty.
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Old 02-16-2022, 09:58 PM
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Originally Posted by AlaskaGuy View Post
I would post a picture if I could - but this center diff is enclosed. It's a Slash 4x4.
I remember on my old slash Id get a ton of debris in there including stones so its not truly inclosed like the front and rear. I would not put any lube on the center but just make sure to have a good gear mesh. On 8th scale a lot of vehicles are metal on metal and never seen one with lube on those gears.
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