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Old 03-25-2014, 11:11 PM   #3916
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Where can I find an English bd7 manual?
From Yokomo
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Old 03-26-2014, 06:44 AM   #3917
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Are you using the kit orings? If so, try the Kyosho P5 orings. For me it took out the binding/tight feel of the outdrives. My diff has had a few months on them and run every weekend with no problems at all. Nice and much smoother than kit built.
Thanks I will try that
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Old 03-27-2014, 01:12 AM   #3918
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My diffs feel terrible with the p5 orings - really grabby. I'm hoping the new yoke ones are a better fit, till then I'm just letting them leak
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Old 03-27-2014, 01:56 AM   #3919
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My diffs feel terrible with the p5 orings - really grabby. I'm hoping the new yoke ones are a better fit, till then I'm just letting them leak
Umm must be your weather because they feel fine to me and everyone else around here.

I also put the updated diff rebuild kit in and they are the exact same P5 orings from Kyosho...
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Old 03-27-2014, 07:43 AM   #3920
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I just used the standard o-rings on the diff, and have so far had no leakage issues. I did spend quite a bit of time sanding the back of the gears down as the diff was very tight, even for a new diff, I also ran an arm reamer through the crown gears as these were very tight on the shaft
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Old 03-29-2014, 12:06 AM   #3921
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Default BD7 gear diff

I'm currently building my BD7 and read most of the tips on here, but the gear diff. The instructions appear to say fill it to about 80%. I've only ever built xray gear duffs before and that seems a lot of oil. Are people putting that much oil in the Yokomo diffs or going just below the top of the gears.

It is very tight... Feels more than 2000. I'm thinking it has too much oil in it or I should had sanded the back of the gears a little...

Any advice?
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Old 03-29-2014, 12:28 AM   #3922
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Originally Posted by jsr555 View Post
I'm currently building my BD7 and read most of the tips on here, but the gear diff. The instructions appear to say fill it to about 80%. I've only ever built xray gear duffs before and that seems a lot of oil. Are people putting that much oil in the Yokomo diffs or going just below the top of the gears.

It is very tight... Feels more than 2000. I'm thinking it has too much oil in it or I should had sanded the back of the gears a little...

Any advice?
If you can find Craig M's diff build on facebook, its a big help,

They work best when you sand the gears so there is non on the mould dimples on the back of the gears, 2 gaskets also help for some reason,
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Old 03-29-2014, 01:27 AM   #3923
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Originally Posted by evochick View Post
If you can find Craig M's diff build on facebook, its a big help,

They work best when you sand the gears so there is non on the mould dimples on the back of the gears, 2 gaskets also help for some reason,
Thanks. Dimples gone. I'll put it back together and see how it goes this time.
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Old 03-29-2014, 09:11 AM   #3924
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If anyone want winning RS setup there is a link:
Any questions PM or fb

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Old 03-31-2014, 11:15 PM   #3925
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Has anyone else had diff leakage issues that were not fixed by using P5 orings?

As after 16/17 runs one of the P5 orings started to leak.

I used green slime liberally applied possibly why the original orings and the P5 orings didn’t leak immediately.
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Old 04-01-2014, 08:34 AM   #3926
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I've yet to have any diff leakage with original BD7 diffs, standard o-rings, or P5
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Old 04-01-2014, 12:41 PM   #3927
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Quote:
Originally Posted by jsr555 View Post
I'm currently building my BD7 and read most of the tips on here, but the gear diff. The instructions appear to say fill it to about 80%. I've only ever built xray gear duffs before and that seems a lot of oil. Are people putting that much oil in the Yokomo diffs or going just below the top of the gears.

It is very tight... Feels more than 2000. I'm thinking it has too much oil in it or I should had sanded the back of the gears a little...

Any advice?
I have 3 yokomo diffs all with OEM seals and none leak.
I only fill the diff to the middle of the cross pins. Think of these gear diffs as little gear pumps. If there is too much oil in them the pressure will make them leak out the seals.
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Old 04-02-2014, 03:04 AM   #3928
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YOKOMO was update gear diff O-Ring is Red color .
1st lot was sold out,
second lot coming friday arrive.
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YOKOMO Touring Car BD-7-yo-bd-500gm-1.jpg  
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Old 04-02-2014, 03:36 AM   #3929
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Originally Posted by RedBullFiXX View Post
I've yet to have any diff leakage with original BD7 diffs, standard o-rings, or P5
Either your lucky or doing something different perhaps you might want to share.
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Old 04-02-2014, 08:25 AM   #3930
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Originally Posted by frozenpod View Post
Either your lucky or doing something different perhaps you might want to share.
As far as leaking from the diff output seals, I don't think I've done anything special, built per the instructions mostly

Checking axial play, and sanding oversize gears if necessary

World Champion, Jilles Groskamp has a pro-tip video here, you may find it useful
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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