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Old 10-11-2007, 09:49 AM   #586
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Just a question...why are some considering replacing the orignal diff?

I think the only weak point on the original was the steel balls. I replaced them with the serpent ceramic ones and have had no problems with the diff running brushless motors.

Just curious??

Craig
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Old 10-11-2007, 10:08 AM   #587
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RW spur gears fit, but need you to drill 2 holes, but you could always run with just the 2 screws

Took mine out on tarmac for the first time on Sunday. Very stable, very fast, just still a little bit of learning for me to do to get it up on the pace. the car reacted well to changes made and also was very tough in any knocks it had.

Cannot fault the car
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Old 10-11-2007, 11:25 AM   #588
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Originally Posted by C.Fox View Post
Just a question...why are some considering replacing the orignal diff?

I think the only weak point on the original was the steel balls. I replaced them with the serpent ceramic ones and have had no problems with the diff running brushless motors.

Just curious??

Craig
There's really no need to use other diffs over the serpent diff...however, I do know for fact that the Yokomo BD diffs are really, really good. They are composite diffs, so are much lighter than the aluminum diffs, and that equals less weight, less rotational mass, quicker acceleration, etc...That's the edge I'm looking for...I practice alot against Yokomo BD's, and can attest to the diff's durability. Just CA glue the diff rings to the diff outdrives, lube, assemble, and tighten all the way and then loosen 1/2 turn and you can litterally run that diff for months w/ mod motors w/o having to change a thing. They are cheaper to replace and rebuild and needed, also...
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Old 10-11-2007, 11:27 AM   #589
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You can use the Yok BD diff internals and out drives but not the pulley. You would have to use the 415pulley they are 36 teeth the stock s400s are 35 teeth. If you want to use the 36 Pulley up front you will have to file the servo saver down a bit so it doesn’t hit the Pulley. And you do have to shim the front diff so it doesn’t move. I don’t know why the front and rear diff are not going to be the same..
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Last edited by THeGame; 10-11-2007 at 12:47 PM.
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Old 10-11-2007, 11:31 AM   #590
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You can use the Yok BD diff internals and out drives but not the pulley. You would have to use the 415 pulley they are 46 teeth the stock s400s are 45 teeth. If you want to use the 46 Pulley up front you will have to file the servo saver down a bit so it doest hit the Pulley. And you do have to shim the front diff so it doesn’t move. I don’t know why the front and rear diff are not going to be the same..
You mean 35 tooth pulleys for the S400 , and tamiya 36 teeth pulleys?

would you please provide some part numbers for those tamiya pulleys?
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Old 10-11-2007, 12:36 PM   #591
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You mean 35 tooth pulleys for the S400 , and tamiya 36 teeth pulleys?

would you please provide some part numbers for those tamiya pulleys?
TA04 is 35T Pulley !
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Old 10-11-2007, 12:50 PM   #592
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You mean 35 tooth pulleys for the S400 , and tamiya 36 teeth pulleys?

would you please provide some part numbers for those tamiya pulleys?
sorry it is 35, I dont know what the part number but they are tamiya black pulleys 36 teeth.
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Old 10-11-2007, 01:48 PM   #593
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sorry it is 35, I dont know what the part number but they are tamiya black pulleys 36 teeth.
Black Tamiya pulleys are 35t, the only one that are 36t are the machine white delrin ones.

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Old 10-11-2007, 02:24 PM   #594
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Black Tamiya pulleys are 35t, the only one that are 36t are the machine white delrin ones.

Ed
Thanks for the help...one more thing on the tamiya pulleys: the white tamiya 36T pulleys- there's one on tower that says its 36t but its actually 18t for less friction, etc...

http://www3.towerhobbies.com/cgi-bin...?&I=LXNUH0&P=7

Will this work? Anyone test and see if this type of pulley actually frees up the car? If we were to use this on the Serpent S400, for internal ratio calculations, we look at it as a 36T or 18T?
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Old 10-11-2007, 02:48 PM   #595
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To make this a bit more intersting...

horizon hobbies has a 35T diff pulley for the TA05 #TAM51212, and another 35t diff pulley for the TRF 415, part#TAM51055 ...are these the same pulley or which is the one to try on the S400?

Has any one checked in Xray 34T Diff pulleys will work on the S400? I sure hope so...
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Old 10-11-2007, 07:36 PM   #596
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To make this a bit more intersting...

horizon hobbies has a 35T diff pulley for the TA05 #TAM51212, and another 35t diff pulley for the TRF 415, part#TAM51055 ...are these the same pulley or which is the one to try on the S400?

Has any one checked in Xray 34T Diff pulleys will work on the S400? I sure hope so...
(#TAM51212) of ta05 it's 36T not like 35T (#TAM51055) of MSX, don't confuse!
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Old 10-11-2007, 07:51 PM   #597
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is any one checking to see if the pulleys are the right pitch.
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Old 10-11-2007, 08:19 PM   #598
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is any one checking to see if the pulleys are the right pitch.
99.9999% sure that they are all 3MR pitch
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Old 10-11-2007, 08:31 PM   #599
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99.9999% sure that they are all 3MR pitch
You rolling w/ Serpents, too? You know your waiting 4 the Team Majic E4
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Old 10-11-2007, 08:38 PM   #600
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You rolling w/ Serpents, too? You know your waiting 4 the Team Majic E4
serpent is on the shelf looking at his twin brother no E4, well not for a while
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