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Old 09-27-2013, 03:17 PM
  #11746  
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Originally Posted by jeff jenkins
If b44 diffs work in the car then we might have a short wait as the guys at the worlds are running gear diffs in there b44.2 buggys.
B44 transmission case is huge compared to a TC3/4, slim chance a gear diff made for a B44 will fit the TC3/4

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Old 09-27-2013, 03:27 PM
  #11747  
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If it has the right dimensions to make the gears mesh, then fear not the dremel tool. It doesn't need to be sealed if it's a sealed diff.
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Old 09-27-2013, 03:37 PM
  #11748  
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Originally Posted by Rojna
B44 transmission case is huge compared to a TC3/4, slim chance a gear diff made for a B44 will fit the TC3/4

they dont look too different to me.
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Old 09-27-2013, 03:41 PM
  #11749  
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Originally Posted by jeff jenkins
By the pic it looks to only have different mount holes and is beefed up but i dont see too big of a difference.
the big difference is the inside of the case, in the b44 you can install the diff either way and will fit, the TC3/4 case does not have room for that. Durango gear diffs are used in B44's but there is no way they will fit a TC3/4 case.

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Old 09-27-2013, 04:41 PM
  #11750  
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The Sweep qts 32 Tires have deep wheel hexes, and will allow lots of track width adjusting spacers between the wheel hexes and axle hexes... Other wheels might not allow such an adjustment....
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Old 09-27-2013, 05:00 PM
  #11751  
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Sweep qts 32 hex depth: 4.28mm
Sweep exp 40 hex depth: 2.85mm
The exp40 Tires fit on the front only, if you want 190mm track width.... Happy Racing....
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Old 09-27-2013, 05:12 PM
  #11752  
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anyone know for sure out of the box which degree caster blocks the TC4 Club Racer comes with?

the instruction manual accompanying it is for the factory car so not sure if the one mentioned there is correct.
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Old 09-27-2013, 08:14 PM
  #11753  
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The club racer comes with four degree castor blocks....
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Old 09-27-2013, 09:36 PM
  #11754  
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As far as gear diff for the tc4 is concerned, I think the $30 Spec-R gear diff for the Tamiya TB03 (#: SPR009TB) is the best bet here, eventhough it should only be used in stock spec classes... It looks to be a fairly direct fit, and might be using the same pinion and ring gear as a tc4.... It might need some slight bearing fitment mods, but I think it's the best solution out there... I am still sticking to my ball diffs though, as you already know, but would definitely like to see what it would take to fit a gear diff in a tc4... Check it out !!!
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Old 09-27-2013, 10:26 PM
  #11755  
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Here is the final tally:
Tc4 ring gear(40teeth), and pinion(16teeth): 2.5 ratio...
Tb03 ring gear(39teeth), pinion(16teeth): 2.4375 ratio...
I guess you guys can run two tb03 gear diffs or a rear tb03 gear diff and a front tc4 spool to create a slight underdrive system... Have fun guys, and happy Racing....
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Old 09-27-2013, 10:30 PM
  #11756  
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That would be a 2.5% underdrive to be correct....
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Old 09-28-2013, 01:26 AM
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The tb03 geardiff will not work. I tried that two years ago it has the ring gear in a position that won't work in our gear boxes.and they are too wide
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Old 09-28-2013, 03:01 PM
  #11758  
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The tb03 gear diff can be a starting point, and a machinist can grind , shorten the whole unit, and relocate the ring gear to get it right.... Maybe a cnc machine can carve a new gear diff case with the new correct dimensions...
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Old 09-28-2013, 09:35 PM
  #11759  
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I am a machinist haha. But yes you can look at the tb03 for ideas. Has anyone tried the geardiff f on the apex tc?
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Old 09-28-2013, 11:10 PM
  #11760  
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The apex design is huge compared to the tb03.... I think a new cnc machined aluminum tb03 type gear diff with set screws to attach the tc4 ring gear(just like the spools) is the way to go....
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