Chapel 5 Posted December 19, 2014 I was wondering if there's any upgrades to the gearbox on the SRB that would make it stronger? Share this post Link to post Share on other sites
kontemax 1725 Posted December 19, 2014 There's a ball diff from Tamiya. There are also vintage Thorp parts but very rare and very expensives. Max Share this post Link to post Share on other sites
Meakz1973 36 Posted December 19, 2014 The SRB gearbox is pretty bombproof. Not sure you're going to find a stronger one. I have always used a brass middle gear for an all metal gear set up. What problem are you having that you want to solve? Share this post Link to post Share on other sites
Chapel 5 Posted December 19, 2014 well, my concern is the original 30+ year old nylon gears are going to shatter eventually. I wanted to get the most robust replacements. Share this post Link to post Share on other sites
Shodog 1835 Posted December 19, 2014 If you can find them, there are vintage brass gears to hop it up. Both MIP and CRP had middle brass gears. Both RCH and CRP had brass spool gears. MIP and Thorp and recently Tamiya made ball diffs for the SRB tranny. Share this post Link to post Share on other sites
bromvw 744 Posted December 19, 2014 IMO the Tamiya ball diff is a piece of junk . Hard to keep adjusted correctly and even when done is a total waste of money . All metal gears would be good but i would just buy a set of new plastic gears as their strong and reliable as is . 1 Share this post Link to post Share on other sites
yellowcat 117 Posted December 19, 2014 I heard really bad things for the Tamiya ball diff. If you can find and afford a Thorp diff. or else those nylon gears are cheap to replace. Share this post Link to post Share on other sites
Chapel 5 Posted December 19, 2014 I'd be fine getting new nylon ones. where's the best place to get them? Share this post Link to post Share on other sites
Backlash 481 Posted December 20, 2014 Chapel, The gears for the re-release Buggy Champ (Rough Rider), Sand Scorcher 2010 and now Fighting buggy (Super Champ) are the same as those found in the original SRB vehicles from the 70's/80's.. The only exception to this is that the re-releases have aluminium pinion gears whereas the originals had brass pinion gears.. I would suggest upgrading to a STEEL pinion gear for any of the SRB models.. The gear sets could possibly be ordered from your local hobby shop, or failing that try Stella Models in Hong Kong or eBay.. Share this post Link to post Share on other sites
Backlash 481 Posted December 20, 2014 Chapel, Here are the internal gears... http://www.ebay.com/itm/NEW-TAMIYA-SAND-SCORCHER-Diff-Gears-ROUGH-RIDER-BUGGY-CHAMP-1-10-TA11-/141484905575?pt=Radio_Control_Parts_Accessories&hash=item20f1285467 And the spurs and pinion gears.. http://www.ebay.com/itm/NEW-TAMIYA-SAND-SCORCHER-Spur-Gears-ROUGH-RIDER-BUGGY-CHAMP-1-10-TA25-/141484905913?pt=Radio_Control_Parts_Accessories&hash=item20f12855b9 Just look at getting some steel pinion gears as the aluminium ones wont last very long, and you could damage the new plastic spur gears.. Share this post Link to post Share on other sites
redzone 212 Posted December 20, 2014 I disagree that the tamiya ball diffs are junk, I assembled mine once and once only when building my buggy champ/scorcher and it has been bulletproof. Extra threadlock on the adjusting screw is the key I feel. 2 Share this post Link to post Share on other sites
bromvw 744 Posted December 20, 2014 I disagree that the tamiya ball diffs are junk, I assembled mine once and once only when building my buggy champ/scorcher and it has been bulletproof. Extra threadlock on the adjusting screw is the key I feel. maybe i just got a bad one - maybe not . I have tried everything , cleaned it , new balls , tread lock ect ect but it still don't work to my satisfaction . Only my personal opinion obviously but i still think its a rubbish piece of overpriced tat . Share this post Link to post Share on other sites
redzone 212 Posted December 22, 2014 Hmm. One thing I did with mine was tension it up but not detension it (back the screw off) like the instructions said. This reverse movement I feel would break the threadlocker's bond on the parts as it sets very quickly when in the absence of air ie under tension.. Result is a diff that is very tight but thats what I wanted anyways so I could still succesfully run it at the beach. Most of it's running has been at Boondall though. Share this post Link to post Share on other sites
Chapel 5 Posted December 22, 2014 what are the benefits of the ball diff? I know how regular car differentials work... here's one I rebuilt and installed this past year in my BMW: but what's going on with the Tamiya one? I assume the standard differential is simply a spool diff (both wheels turn at the same rate) 1 Share this post Link to post Share on other sites
njmlondon 570 Posted December 22, 2014 what are the benefits of the ball diff? I know how regular car differentials work... here's one I rebuilt and installed this past year in my BMW: Nice work. What BMW is that for? Just bought myself a 1989 E30 model 320 which I hope to do some work on myself. Share this post Link to post Share on other sites
bromvw 744 Posted December 22, 2014 Looks like a E36 to me . Total car geek alert Share this post Link to post Share on other sites
Chapel 5 Posted December 22, 2014 Looks like a E36 to me . Total car geek alert that it is. - http://imgur.com/a/sln8d#0 E30s are cake to work on. Share this post Link to post Share on other sites
bromvw 744 Posted December 22, 2014 gold star to me then lol . BTW a ball diff is in effect a LSD . No real advantage on a Scorcher unless your mostly running it on tarmac . For the beach best left as stock . Share this post Link to post Share on other sites
Chapel 5 Posted December 23, 2014 yeah, beach, dirt, etc... 1 Share this post Link to post Share on other sites
bromvw 744 Posted December 23, 2014 yeah, beach, dirt, etc... leave it stock then in that case . Share this post Link to post Share on other sites
Cooltoys 129 Posted December 27, 2014 I have a front spoiler/lip for that model sitting in the garage.. I forgot what brand it was. One of those popular names i could not remember at the moment... Zenderi or something else. For the srb I have both the thorp & new ball bearings both are great.. that it is. - http://imgur.com/a/sln8d#0 E30s are cake to work on. Share this post Link to post Share on other sites
Chapel 5 Posted December 27, 2014 Zender PM me. I love Zender stuff Share this post Link to post Share on other sites