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Old 02-15-2013, 10:21 AM   #2761
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Originally Posted by Slapstick10 View Post
I was interested in adding a fifth body post to my t4. I am planning on using the hole that was pre drilled in the front of the top deck. My question would be will adding the post stiffen the chassis or effect the cars rotation. I can reem the hole in the body a little larger to allow a bit of flex but is it needed?
I'd suggest if you do want to add it, why not add it as a one sided support without the use of the body clip outside of the body and the need to make a hole in the body. You can shim it with shims between the body post and the upper deck.
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Old 02-15-2013, 10:46 AM   #2762
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Originally Posted by jlfx car audio View Post
I put mine on top of the steering post (the side is outside of sweeper just in case I want to run a crap body ) works great and don't seam to tweak chassis like the top deck would (possibly cracking top deck also)
Thanks for your reply. Can you post a picture please?
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Old 02-15-2013, 01:27 PM   #2763
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can anyone tell me what a hard rear hub will do over a medium ? thanks
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Old 02-15-2013, 11:27 PM   #2764
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can anyone tell me what a hard rear hub will do over a medium ? thanks
A medium will give you a little more rear bite.
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Old 02-16-2013, 08:06 PM   #2765
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Any tips for a leak free diff?

1st time I build it, I admit the thin O-ring got out of place and it was leaking when sitting on the shelf.

So I rebuilt it with a new O-ring. Let the car sit a few days, didn't see any leaks. Then when I raced my car today, it started leaking all out again. When I build the diffs, I make sure to lightly sand the mating surfaces on a flat surface, and add plenty of green slime to help it seal a bit better. Also I have not overtorqued the 4 screws. I've built other diffs like this with no real issues but just seem to have problems with the Xray diff.

Thinking about just trying out a ball diff in the rear...
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Old 02-16-2013, 08:39 PM   #2766
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Any tips for a leak free diff?

1st time I build it, I admit the thin O-ring got out of place and it was leaking when sitting on the shelf.

So I rebuilt it with a new O-ring. Let the car sit a few days, didn't see any leaks. Then when I raced my car today, it started leaking all out again. When I build the diffs, I make sure to lightly sand the mating surfaces on a flat surface, and add plenty of green slime to help it seal a bit better. Also I have not overtorqued the 4 screws. I've built other diffs like this with no real issues but just seem to have problems with the Xray diff.

Thinking about just trying out a ball diff in the rear...
I've built 4 gear diffs and none have leaked, I never sanded or added grease to the o rings.
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Old 02-16-2013, 08:45 PM   #2767
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I've built 4 gear diffs and none have leaked, I never sanded or added grease to the o rings.
Gee...thanks for the tip...
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Old 02-16-2013, 08:54 PM   #2768
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The o-ring has been found to be not needed. You should be ok with just the paper gasket.
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Old 02-16-2013, 08:56 PM   #2769
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Originally Posted by Dan View Post
Any tips for a leak free diff?

1st time I build it, I admit the thin O-ring got out of place and it was leaking when sitting on the shelf.

So I rebuilt it with a new O-ring. Let the car sit a few days, didn't see any leaks. Then when I raced my car today, it started leaking all out again. When I build the diffs, I make sure to lightly sand the mating surfaces on a flat surface, and add plenty of green slime to help it seal a bit better. Also I have not overtorqued the 4 screws. I've built other diffs like this with no real issues but just seem to have problems with the Xray diff.

Thinking about just trying out a ball diff in the rear...
I use much more shock o ring slime on the o rings. Add a small amount of shock oil into the paper gasket and I do not use the big rubber o ring usually. No issues.
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Old 02-16-2013, 09:06 PM   #2770
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Originally Posted by Adam B View Post
The o-ring has been found to be not needed. You should be ok with just the paper gasket.
+1
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Old 02-16-2013, 09:06 PM   #2771
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Originally Posted by Adam B View Post
The o-ring has been found to be not needed. You should be ok with just the paper gasket.
+1
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Old 02-16-2013, 09:20 PM   #2772
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Thanks guys, I'll give it another go. BTW, whats good for removing silicon oil/grime off the rear belt?
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Old 02-16-2013, 10:09 PM   #2773
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[QUOTE=Dan;11824452]Thanks guys, I'll give it another go. BTW, whats good for removing silicon oil/grime off the rear

Ive used motor spray and a tooth brush.
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Old 02-16-2013, 10:38 PM   #2774
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Quote:
Originally Posted by Dan View Post
Any tips for a leak free diff?

1st time I build it, I admit the thin O-ring got out of place and it was leaking when sitting on the shelf.

So I rebuilt it with a new O-ring. Let the car sit a few days, didn't see any leaks. Then when I raced my car today, it started leaking all out again. When I build the diffs, I make sure to lightly sand the mating surfaces on a flat surface, and add plenty of green slime to help it seal a bit better. Also I have not overtorqued the 4 screws. I've built other diffs like this with no real issues but just seem to have problems with the Xray diff.

Thinking about just trying out a ball diff in the rear...
how much fluid are you putting in the diff? I thought I had a leaky diff when I built my first few, only eyeballing the amount of fluid I put in. Once I put the empty diff on a scale and added the fluid by weight like the directions suggest haven't had a leak since. Leads me to believe it was more of an overflow problem than a leaking problem.

Hope that helps!!
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Old 02-16-2013, 11:21 PM   #2775
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Quote:
Originally Posted by Dan View Post
Any tips for a leak free diff?

1st time I build it, I admit the thin O-ring got out of place and it was leaking when sitting on the shelf.

So I rebuilt it with a new O-ring. Let the car sit a few days, didn't see any leaks. Then when I raced my car today, it started leaking all out again. When I build the diffs, I make sure to lightly sand the mating surfaces on a flat surface, and add plenty of green slime to help it seal a bit better. Also I have not overtorqued the 4 screws. I've built other diffs like this with no real issues but just seem to have problems with the Xray diff.

Thinking about just trying out a ball diff in the rear...
Hi,

I've built 6 different diff exactly like the manual says, just using greenslim on all O ring, no one leaks.
=> I put exactly 1,3 g of oil ( you can find tool to measure that for 10 USD)
=> I change each time I rebuilt the diff the big Oring because it swells with my X ceed silicone oil.

I had Yokomo before and X ray diff are lovely and leaks never, I can' t say the same for Yokomo diff.

hope that helps too...

Nico'
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