Losi xxx-4

Old 11-19-2007, 07:05 PM
  #1471  
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The old one never loosened itself up with the brushless and back then it was being run with a 4.5. It has a 5.5 in it now.

I did have to add an extra shim on the tensioner side to keep the arm from touching but I can't see how this would cause an issue.
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Old 11-19-2007, 07:13 PM
  #1472  
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the slipper will loosen as the friction pegs wear..
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Old 11-19-2007, 08:18 PM
  #1473  
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No shit.

I am talking about it loosening up in the course of about 3 good romps on the throttle - not over the course of time.
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Old 11-19-2007, 09:00 PM
  #1474  
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calm down turbo...
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Old 11-20-2007, 03:45 AM
  #1475  
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I end up lock-tighting the slipper nut on when I was running a 3.5 in my XXX-4. I tried to do without it, but even when I would really sinch it down, within a lap or two it would loosen up again.
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Old 11-20-2007, 12:21 PM
  #1476  
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Originally Posted by chewiefttc4
calm down turbo...
I am calm dude.

Hoagie - How did you get it loctited where it needed to be.

I have no issue with doing so but I'm not sure I know how to get it where I want it, pull it apart to add the threadlock and then get it back together where I want it.

Did you just put it on and then slap it together real quick, run it and adjust it while the Loctite was still wet or did you pull it out and just run a bead around the outer mating edge?
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Old 11-21-2007, 04:07 AM
  #1477  
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When I ran 4 Wheel, I ran my slipper locked. Especially with the 3.5R! I was able to tune the low end enough with my radio and in the ESC that my car wouldn't break loose when I got on the throttle, unless I cracked it wide open, so I really had no need for a slipper.

I guess you could try to get it set and then run a bead around the outside between the nut and hub, but keeping it from loosening up while trying to find the sweet spot could be a task. You'll just have to give it a try.

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Old 11-21-2007, 09:43 AM
  #1478  
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If I were to lock out the slipper anyway then why not just save a bunch of effort and switch over to the XXX-S spur gear/pulley unit? The drivetrain is sealed enough that I am not concerned about the 64 pitch gears getting chewed up.
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Old 11-21-2007, 10:48 AM
  #1479  
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Ok cool. I wasn't sure if there was another "less obvious" reason, like Losi had some 3rd world kids working 10 hours a day hand-grinding XXX-4 chassis' to accomidate a larger unit or something. :P

I have a rack of 64 pitch pinions from my pan car days.
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Old 11-21-2007, 10:59 AM
  #1480  
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I didn't have 64 pitch pins, and I didn't want to buy any either. I guess you can call it a cheap "Spur" of the moment fix
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Old 11-21-2007, 11:04 AM
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I've actually looked at making a locker hub for the 48's as part of the "THD" product line, but I think there may already be something out there for that or maybe it was the XXX-S one that I had seen.

Last edited by Team Hoagie; 11-21-2007 at 12:37 PM.
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Old 11-21-2007, 11:49 AM
  #1482  
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I just did some research, and some thinking.

The B44s, BJ4s, TC3/4's and XXX-S all lack a slipper on the spur. All of them handle the power of low-turn brushless with no issues. The trick on them is setting the slip via the diffs. No reason why, if it works on an XXX-S it won't work on an XXX-4.

The parts needed to convert the XXX-4 slipper to the XXX-S are the spur gear(s) and 1 of these:

LOSA3238 - Top Shaft Set w/Hardware: XXX-S

NOW - the only part you need out of that is the little spacer. If you have replaced that shaft on your XXX-4 in the past you will have the part, since it comes with the shaft and it is the same bag for both cars.

Additionally - Losi makes 48 pitch spur/pulley combos for the XXX-S but I don't like the sizes. The biggest is a 90T and that would limit me to the larger 48 pitch pinions which will push the adjustability of the motor. Neither of the 118T and 128T 64 pitch options are ideal (the 94T 48 pitch works out to a 125T 64 pitch) but both are smack in the middle of the 64 pitch pinion size range.
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Old 11-21-2007, 12:20 PM
  #1483  
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Nice find!

Last edited by Team Hoagie; 11-21-2007 at 12:37 PM.
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Old 11-21-2007, 02:08 PM
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Originally Posted by Drew Manzella
I just did some research, and some thinking.

The B44s, BJ4s, TC3/4's and XXX-S all lack a slipper on the spur. All of them handle the power of low-turn brushless with no issues. The trick on them is setting the slip via the diffs. No reason why, if it works on an XXX-S it won't work on an XXX-4.
My slipper on my B44 is on the...spur. Guess I built it wrong.
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Old 11-21-2007, 03:01 PM
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Drew, are you going to be starting the 4 wheeler class with us @ coastal? I seen that you were on the coastal hobby link.
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