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lincpimp · 01.22.2011, 09:48 PM

Well, I have run a few different savage diff setups.

Old 21/25 savages had 2 spider gears, you could upgrade them to 4 spiders with a hpi kit. Composite cups usually wore out where the cross shafts slipped in. Not good enough for regular mt wheels/tires and a feigao xl.

So I went to the hpi al diff cups. Curred the cross shaft issue as the shafts were in al tracks instead of plastic. However the ring and pinions started to break.So I tried shimming them, seemed to help but the rear ring and pinion went again. Blamed the flexible stock plastic bulks for that. Never had bearing issues but I have a feeling I would had the diffs held up better.

I do have a set of gh bulks with bulletproof gears in them. Have not run them yet, but they are said to be the best out there.

I do agree that heavy diff fluid should help the spider gears. Landing on one tire with the throttle wide open transmits alot of shock to the spiders.

Wonder if the hot bodies hardened spiders for the lsp would fit in the savvy diff cups? I have a set somewhere, will have to try. I know they do not fit lst diffs, but the cups are smaller on those.

	(#3)
lincpimp Check out my huge box! Offline Posts: 11,935 Join Date: Aug 2007 Location: Slidell, LA	01.22.2011, 09:48 PM Well, I have run a few different savage diff setups. Old 21/25 savages had 2 spider gears, you could upgrade them to 4 spiders with a hpi kit. Composite cups usually wore out where the cross shafts slipped in. Not good enough for regular mt wheels/tires and a feigao xl. So I went to the hpi al diff cups. Curred the cross shaft issue as the shafts were in al tracks instead of plastic. However the ring and pinions started to break.So I tried shimming them, seemed to help but the rear ring and pinion went again. Blamed the flexible stock plastic bulks for that. Never had bearing issues but I have a feeling I would had the diffs held up better. I do have a set of gh bulks with bulletproof gears in them. Have not run them yet, but they are said to be the best out there. I do agree that heavy diff fluid should help the spider gears. Landing on one tire with the throttle wide open transmits alot of shock to the spiders. Wonder if the hot bodies hardened spiders for the lsp would fit in the savvy diff cups? I have a set somewhere, will have to try. I know they do not fit lst diffs, but the cups are smaller on those. Alot of Savage parts for sale!!!