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Old 07-05-2012, 02:02 PM   #3076
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Originally Posted by Qwiglee View Post
OK so I will totally disassemble and take the o-rings out and then spray with motor spray. I'm glad I checked because I was going to just open up the two halves of the diff and spray it out. Thanks for the tips.

I noticed that the big o-ring between the two halves can't be reused because it swells up and won't fit back in its slot so I ordered replacements. I'm guessing this is normal?
It's normal and you actually don't need to use one. I've used down to 500cSt without any leakage.
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Old 07-05-2012, 04:16 PM   #3077
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It's normal and you actually don't need to use one. I've used down to 500cSt without any leakage.
Ive personally had an issue at 700 where it leaked. I usually tighten using an x pattern too.
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Old 07-05-2012, 04:57 PM   #3078
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glue the large o-ring to the opposite side of the diff with ca been doing this for a long time and have not replaced the o-ring since first build months ago 3 diffs no leaks ever
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Old 07-05-2012, 05:53 PM   #3079
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I've been trying to get at a 3.85ish fdr...my old spur gears from my tc6 don't fit this car and I cant seem to find a combination of spur and pinion available that will work. I bought a couple 84t/48p X-ray spur gears and a 43t/48p pinion gear, but the combo won't fit in the car, pinion too large.

Not even my 36t/48p pinion works with that spur.
Anyone get to an FDR of around 3.85-4.00 without having to hack a non xray brand spur gear?

I've looked at the gearchart from xrays site and I'm assuming it shows the only working combinations with X-ray spurs. Has anyone tried a combination that was a drop in fit not shown on the chart?
I've searched amainhobbies and couldn't find the 69t/48p I was looking for...

Either way, I race blinky at a track where the FDR's are around 3.85, I race at others where fdrs are 4.5 and
6. I want to just have one spur gear to cover this range and just have to change pinions.
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Old 07-05-2012, 06:23 PM   #3080
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Originally Posted by ChampRC View Post
I've been trying to get at a 3.85ish fdr...my old spur gears from my tc6 don't fit this car and I cant seem to find a combination of spur and pinion available that will work. I bought a couple 84t/48p X-ray spur gears and a 43t/48p pinion gear, but the combo won't fit in the car, pinion too large.

Not even my 36t/48p pinion works with that spur.
Anyone get to an FDR of around 3.85-4.00 without having to hack a non xray brand spur gear?

I've looked at the gearchart from xrays site and I'm assuming it shows the only working combinations with X-ray spurs. Has anyone tried a combination that was a drop in fit not shown on the chart?
I've searched amainhobbies and couldn't find the 69t/48p I was looking for...

Either way, I race blinky at a track where the FDR's are around 3.85, I race at others where fdrs are 4.5 and
6. I want to just have one spur gear to cover this range and just have to change pinions.
http://www.speedtechrc.com/store/ebp...nid=392&id=957
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Old 07-05-2012, 06:32 PM   #3081
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Originally Posted by ChampRC View Post
I've been trying to get at a 3.85ish fdr...my old spur gears from my tc6 don't fit this car and I cant seem to find a combination of spur and pinion available that will work. I bought a couple 84t/48p X-ray spur gears and a 43t/48p pinion gear, but the combo won't fit in the car, pinion too large.

Not even my 36t/48p pinion works with that spur.
Anyone get to an FDR of around 3.85-4.00 without having to hack a non xray brand spur gear?

I've looked at the gearchart from xrays site and I'm assuming it shows the only working combinations with X-ray spurs. Has anyone tried a combination that was a drop in fit not shown on the chart?
I've searched amainhobbies and couldn't find the 69t/48p I was looking for...

Either way, I race blinky at a track where the FDR's are around 3.85, I race at others where fdrs are 4.5 and
6. I want to just have one spur gear to cover this range and just have to change pinions.
Ive run a 92/60 in my car I know you can run bigger stuff you just stuck on running 48 pitch?
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Old 07-05-2012, 07:55 PM   #3082
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48dp pinion/spur , 38/72 will do the trick(3.8 i think). RW racing for both parts. Can be found on ebay
Not sure if you will ever have one spur to cover all scenarios, best to buy a couple.
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Old 07-05-2012, 08:56 PM   #3083
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Serpent spurs also have the correct 3 hole pattern.
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Old 07-05-2012, 09:32 PM   #3084
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Originally Posted by Qwiglee View Post
I noticed that the big o-ring between the two halves can't be reused because it swells up and won't fit back in its slot so I ordered replacements. I'm guessing this is normal?
It is. I've herd that quite a few guys skip fitting this o-ring and have not had a problem.
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Old 07-07-2012, 02:07 AM   #3085
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T3 lower deck advice please. Which would give more rear traction?

Smokem T3mx or Xray 2mm lower decks.
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Old 07-07-2012, 04:38 AM   #3086
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Before buying either try the mod on page 122
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Old 07-07-2012, 06:35 AM   #3087
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Before buying either try the mod on page 122
What's the mod? Page numbers depend on your settings and aren't the same or everyone.
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Old 07-07-2012, 06:42 AM   #3088
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The euro has hit a two year low versus the USD. Will we see some more reasonable prices soon on xray parts?
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Old 07-07-2012, 07:04 AM   #3089
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What's the mod? Page numbers depend on your settings and aren't the same or everyone.
Hagberg mod narrowing rear track width
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Old 07-07-2012, 07:35 AM   #3090
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Hagberg mod narrowing rear track width
that would give you less rear traction, no?
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