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Spec-R Gear diff review

Spec-R Gear diff review

Old 09-28-2010, 06:51 AM
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Originally Posted by itchynads
You are running thicker oil so I'm not suprised it does not leak .
I'm running 1000cst in the rear which is more runny.
i'm running 900cst oil. no problem so far....but i'm using the latest gdiff (bd5) from spec-r which they come with x-ring and improved big shim..
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Old 09-28-2010, 09:34 AM
  #572  
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Originally Posted by kschu
i'm running 900cst oil. no problem so far....but i'm using the latest gdiff (bd5) from spec-r which they come with x-ring and improved big shim..
any chance you could measure the shim for us?

thanks
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Old 09-28-2010, 09:38 AM
  #573  
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Originally Posted by Marcos.J
i have been running gear diff front and rear for the last 2 months and it works very well , using 120,000 diff oil in the front and 10,000 in the rear
I've been running 100,000 ft and 20,ooo rear, I 'am going to 12,000 rear as it bites like hell when I touch the power, I want it to roll more around the corner. I like the diff up ft but going to 300,000, more like spool with a little slip in it- hope that helps
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Old 10-03-2010, 05:53 AM
  #574  
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any news on the size of the new improved bigger shim and is there a part number?
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Old 10-03-2010, 05:55 AM
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Originally Posted by 008-Racer
any news on the size of the new improved bigger shim and is there a part number?
I remember seeing somewhere it says 0.2mm shim instead of the 0.1mm.
Ran the bd5 one over the weekend around 50mins of run time and no sign of failure yet. Was run on carpet with a 4.5t smashing the throttle everywhere so a fair amount of load was applied to it. It seems to be leaking a little bit on the side further away from the pulley.
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Old 10-03-2010, 07:49 AM
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Hello,

I got a spec-r diff with new x ring for my tam416x .

I have a big problem, i dont know if it s a bearing issue or an outdrive issue but i have big vibration on the shaft left and right.

And my transmission isn't smoot at all!!

The bearing are been pushed in and outdrive seems to be inline with the diff..

Anyone have a simillar issue?
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Old 10-11-2010, 06:34 PM
  #577  
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Default Aluminum outdrives?

Just wondering if Spec R made has aluminum out drives for their gear diff? I'm considering one in the front for my T3'11 in VTA. It's about half the price of the Xray diff. It would have some give over a spool, but I'm just worried it's too heavy for 25t class?

Last edited by RCknight; 10-11-2010 at 07:17 PM.
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Old 10-16-2010, 09:39 PM
  #578  
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Could anybody tell me what brand of diff oil are you using, please?

Best regards
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Old 10-16-2010, 09:58 PM
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Originally Posted by RCknight
Just wondering if Spec R made has aluminum out drives for their gear diff? I'm considering one in the front for my T3'11 in VTA. It's about half the price of the Xray diff. It would have some give over a spool, but I'm just worried it's too heavy for 25t class?
The outdirves that come on it are alumn. It weighs 7 grams more than an xray diff as well.

EA
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Old 10-17-2010, 12:47 AM
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Originally Posted by EAMotorsports
The outdirves that come on it are alumn. It weighs 7 grams more than an xray diff as well.

EA
Anyone recommend what oil to start with for a front gear diff in the VTA class? I'll give it a try.
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Old 10-17-2010, 03:15 AM
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Originally Posted by RCknight
Anyone recommend what oil to start with for a front gear diff in the VTA class? I'll give it a try.
I've played with a few variations on carpet, The smoothest set up I ve found is a gear diff in the front, 100,000+ oil, I tend to like 100,000 but It works with heavier. And shock horror!!!, a ball diff in the back, this depends on track but I find if there lots of chicanes and not t many areas to really plant the power the ball diff is better for me. But remember I am still getting more turn in from the front diff and not loosing to much out the corners due to the gear rather ball diff in the front. If the track has lots of on/off throttle areas a gear diff could work best.

Just my thoughts but I think they are an option not the only thing you can use!!
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Old 10-17-2010, 03:29 AM
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Originally Posted by michael.branth
I've played with a few variations on carpet, The smoothest set up I ve found is a gear diff in the front, 100,000+ oil, I tend to like 100,000 but It works with heavier. And shock horror!!!, a ball diff in the back, this depends on track but I find if there lots of chicanes and not t many areas to really plant the power the ball diff is better for me. But remember I am still getting more turn in from the front diff and not loosing to much out the corners due to the gear rather ball diff in the front. If the track has lots of on/off throttle areas a gear diff could work best.

Just my thoughts but I think they are an option not the only thing you can use!!
Thanks that helps. I think I'll try it. It's half the cost of a diff. I hope the heavier gear diff won't dog me in VTA. lol
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Old 10-17-2010, 08:48 AM
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Originally Posted by mac853
Could anybody tell me what brand of diff oil are you using, please?

Best regards
Outdoors I was using XRay shock oil. I ran 350cst outdoors.
Indoors on carpet I'm now using Mugen diff oil because it is availabld in closer cst ranges. I'm currently testing with 3000cst.
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Old 10-17-2010, 09:07 AM
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I would like to see the set up shet from Eric Dankel from this weekends ETS race

He was running front and rear gear diffs

nice to see what oils he was using
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Old 10-17-2010, 09:30 AM
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Questions??

Originally Posted by hanulec
Outdoors I was using XRay shock oil. I ran 350cst outdoors.
Indoors on carpet I'm now using Mugen diff oil because it is availabld in closer cst ranges. I'm currently testing with 3000cst.
Could you tell me if these CST and WT are same unit, if comparing with Kyosho and Mugen ones, they are the same comparison?
And i think shock oil and 350 are so low, isn't it?

Best regards
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