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Old 05-23-2007, 06:03 AM   #4051
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Quote:
Originally Posted by ctn226
anyone can help me? I have a diff problem with this type R. all of the pulley which is have a ball bearing are melted, although I have tighten the front diff and a bit loose at the back. I am using GTB with 4.5R with 9.56 final ratio. I build the diff as per manual, is there anything wrong with my setup or something wrong with the diff?
It sounds like it wasn't tight enough and was slipping, causing incredible friction and heat, melting the pulley.
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Old 05-23-2007, 07:36 AM   #4052
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Originally Posted by BlueBird-sr
It sounds like it wasn't tight enough and was slipping, causing incredible friction and heat, melting the pulley.
yeah you missed a step or spmething to have that happen to your diff , i run a 3.5 brushless with no problems at all,just pay close attention when building your diff
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Old 05-23-2007, 08:06 AM   #4053
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Originally Posted by Ali Graham
And whose track record is that Good to hear it's going well Christoff That truly used and abused JRXS of yours can be retired!
Sorry to dissapoint you Ali but its Chris Clarke's, he beat yours not so long ago!
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Old 05-23-2007, 03:34 PM   #4054
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i did some minor changes to a set up that i posted a few pages ago, i changed the front long arms to the short arms and raised the roll center front and rear, and wow what a difference , i ran it earlier today at my local track (with a un-prepped track) and was really good!! cant wait to try it again this weekend on a prepped track.
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Old 05-23-2007, 08:12 PM   #4055
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marcos: what did raising the roll centers do in terms of handling?
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Old 05-23-2007, 08:51 PM   #4056
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Adding more traction by making the car roll more.

oops - I was thinking of the the upper arm, my bad.

Last edited by Sean R; 05-23-2007 at 09:04 PM.
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Old 05-23-2007, 08:55 PM   #4057
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Adding more traction by making the car roll more.
High roll center = car will lean less, react faster, and provide more over all traction.
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Old 05-23-2007, 09:02 PM   #4058
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Blue/RBLove: I know thats what it will "technically" do. I just wanted to confirm if thats what Marcos also observed when he did the change. But thanks, I appreciate all the help everyone provides in these threads.
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Old 05-23-2007, 09:44 PM   #4059
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Blue/RBLove: I know thats what it will "technically" do. I just wanted to confirm if thats what Marcos also observed when he did the change. But thanks, I appreciate all the help everyone provides in these threads.
Got ya. Sorry about that. I am anxious to hear his thoughts as well..
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Old 05-23-2007, 10:38 PM   #4060
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Quote:
Originally Posted by RBLove
High roll center = car will lean less, react faster, and provide more over all traction.
ditto
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Old 05-23-2007, 10:39 PM   #4061
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also with the short front arms you are not able to use the lower shock mounting hole on the front shock tower the left shock's collar will rub against the front diff pulley
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Old 05-24-2007, 01:18 AM   #4062
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Quote:
Originally Posted by Marcos.J
yeah you missed a step or spmething to have that happen to your diff , i run a 3.5 brushless with no problems at all,just pay close attention when building your diff
Thanks Bluebird-sr and Marcos.J for your help, for your info, I already tightened them quite tight and just a bit loose at the back, after the race I disassembled the diff and I found that the thrust bearing ( F/R ) were broken too. Marcos may I know how tight is the diff to use a brushless motor? thanks
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Old 05-24-2007, 01:49 AM   #4063
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RBLove: as mentioned i appreciate all the inputs .... so its all good!

Marcos: good to hear! im actually planning to run the high roll set up this weekend as well.
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Old 05-24-2007, 05:48 AM   #4064
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Quote:
Originally Posted by ctn226
Thanks Bluebird-sr and Marcos.J for your help, for your info, I already tightened them quite tight and just a bit loose at the back, after the race I disassembled the diff and I found that the thrust bearing ( F/R ) were broken too. Marcos may I know how tight is the diff to use a brushless motor? thanks
i build it like i build every diff using AdrianM method,
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Old 05-24-2007, 06:32 AM   #4065
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Quote:
Originally Posted by ctn226
Thanks Bluebird-sr and Marcos.J for your help, for your info, I already tightened them quite tight and just a bit loose at the back, after the race I disassembled the diff and I found that the thrust bearing ( F/R ) were broken too. Marcos may I know how tight is the diff to use a brushless motor? thanks
Are you using the thrust race that comes with the 'R' kit, if so you may find that the balls in that particular thrust race some times come dislodged and lock up the diff spiradically, there are other thrust races avaliable which the balls sit in a solid washes and not a hollow one, these work far better.
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