Go Back  R/C Tech Forums > General Forums > Electric On-Road
Spec-R Gear diff review >

Spec-R Gear diff review

Spec-R Gear diff review

Reply

Old 05-31-2010, 01:58 AM
  #1  
Tech Regular
Thread Starter
iTrader: (14)
 
P.I.M.P's Avatar
 
Join Date: Jul 2009
Posts: 464
Trader Rating: 14 (100%+)
Default Spec-R Gear/3 racing diff review

hi guys lets talk about any problems good and bad where having with the Spec-R diff and what other aftermarket parts can be fitted in replace of standard parts and what oils work the best for brands of cars.

Last edited by P.I.M.P; 08-24-2010 at 02:13 PM.
P.I.M.P is offline  
Reply With Quote
Old 05-31-2010, 02:04 AM
  #2  
Tech Regular
Thread Starter
iTrader: (14)
 
P.I.M.P's Avatar
 
Join Date: Jul 2009
Posts: 464
Trader Rating: 14 (100%+)
Default

OK ill start there is a problem with the geared diff it looks like the shim in behind the crown gear compresses into the o-ring slot and then the pin comes out of the crown gear and strips the crown gear pin slot any ideas what to do as this has happen 3 out of 5 races.
P.I.M.P is offline  
Reply With Quote
Old 05-31-2010, 02:38 AM
  #3  
Tech Champion
iTrader: (12)
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,180
Trader Rating: 12 (100%+)
Default

HK many peoples same your case !
so they keep to use NT1 Rear gear diff !
RC MARKET is offline  
Reply With Quote
Old 05-31-2010, 02:43 AM
  #4  
Tech Champion
iTrader: (9)
 
Join Date: Sep 2001
Location: Mongville
Posts: 6,982
Trader Rating: 9 (100%+)
Default

Make sure that the crown gear sits fully into the slot, when building one of mine the gear wouldnt sit down fully.

I had about 6 runs in a T3, small very high grip track running 10.5 no problems so far. I have a 416 version fitted in a 3Racing Sakura, only had about 3 runs, but no problems.

In the Sakura i used 3000wt oil, this is silky smooth, but a bit too tight
In the T3 i mixed 1000 and 3000 (need to get some 2000) and it was very good, lots of drive out of the corner, a touch more steering than the ball diff, and felt like it did not unload as much through fast on power corners.

Thanks for the heads up on the pin issue though, i will keep an eye on them.
Besercoe is offline  
Reply With Quote
Old 05-31-2010, 02:54 AM
  #5  
Tech Regular
Thread Starter
iTrader: (14)
 
P.I.M.P's Avatar
 
Join Date: Jul 2009
Posts: 464
Trader Rating: 14 (100%+)
Default

Originally Posted by Besercoe View Post
Make sure that the crown gear sits fully into the slot, when building one of mine the gear wouldnt sit down fully.

I had about 6 runs in a T3, small very high grip track running 10.5 no problems so far. I have a 416 version fitted in a 3Racing Sakura, only had about 3 runs, but no problems.

In the Sakura i used 3000wt oil, this is silky smooth, but a bit too tight
In the T3 i mixed 1000 and 3000 (need to get some 2000) and it was very good, lots of drive out of the corner, a touch more steering than the ball diff, and felt like it did not unload as much through fast on power corners.

Thanks for the heads up on the pin issue though, i will keep an eye on them.
i think to fix this a larger shim is needed to be used the same size as the crown gear because the smaller shim can easily collapse into the o-ring slot but its only a short term fix i think with larger shim.
P.I.M.P is offline  
Reply With Quote
Old 05-31-2010, 03:00 AM
  #6  
Tech Elite
iTrader: (10)
 
jonest's Avatar
 
Join Date: May 2005
Location: Johor, Malaysia
Posts: 3,137
Trader Rating: 10 (100%+)
Default

Originally Posted by RC MARKET View Post
HK many peoples same your case !
so they keep to use NT1 Rear gear diff !
They use NT1 gear diff on the TRF416? Or is it just the gear?
jonest is offline  
Reply With Quote
Old 05-31-2010, 04:51 AM
  #7  
Tech Champion
iTrader: (38)
 
Join Date: Oct 2005
Location: Cincinnati, OH
Posts: 5,360
Trader Rating: 38 (100%+)
Default

Originally Posted by jonest View Post
They use NT1 gear diff on the TRF416? Or is it just the gear?
t3
or8ital is offline  
Reply With Quote
Old 05-31-2010, 05:56 AM
  #8  
Tech Fanatic
 
Team-RTR's Avatar
 
Join Date: Jan 2004
Location: sydney
Posts: 917
Default

as the NT1 diff mod fits the T3, i assume it fits the 009 aswell? if so can someone post any necessary mods or is it a direct fit?
Team-RTR is offline  
Reply With Quote
Old 05-31-2010, 06:30 AM
  #9  
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

Can someone post part numbers for the Xray parts needed to make up the gear diff !!
razzor is offline  
Reply With Quote
Old 05-31-2010, 07:15 AM
  #10  
Tech Fanatic
iTrader: (2)
 
jammincrtjames's Avatar
 
Join Date: Mar 2007
Location: GA
Posts: 969
Trader Rating: 2 (100%+)
Default

haven't gear diffs been tried before in Elec TC? If they were better than a standard ball diff, wouldn't the manufacturers already be using them?
jammincrtjames is offline  
Reply With Quote
Old 05-31-2010, 07:35 AM
  #11  
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

They work a treat in mod and faster stock classes when running on asphalt.
Also no more diff rebuilds and failures.
Been trying to get a Serpent gear diff for a while now.
razzor is offline  
Reply With Quote
Old 05-31-2010, 07:39 AM
  #12  
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

Originally Posted by razzor View Post
Can someone post part numbers for the Xray parts needed to make up the gear diff !!
Found it p/n 535000 complete front gear diff.
razzor is offline  
Reply With Quote
Old 05-31-2010, 07:47 AM
  #13  
Tech Champion
iTrader: (12)
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,180
Trader Rating: 12 (100%+)
Default

Originally Posted by jonest View Post
They use NT1 gear diff on the TRF416? Or is it just the gear?
yes use 416 pulley mod. !
& next week have new for tamiya diff cup in NT1 rear gear diff to use .
RC MARKET is offline  
Reply With Quote
Old 05-31-2010, 07:47 AM
  #14  
Tech Champion
iTrader: (12)
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,180
Trader Rating: 12 (100%+)
Default

Originally Posted by Team-RTR View Post
as the NT1 diff mod fits the T3, i assume it fits the 009 aswell? if so can someone post any necessary mods or is it a direct fit?
Yes fit !
u can see T3 topic had posted some photo ago
RC MARKET is offline  
Reply With Quote
Old 05-31-2010, 08:13 AM
  #15  
Tech Champion
iTrader: (38)
 
Join Date: Oct 2005
Location: Cincinnati, OH
Posts: 5,360
Trader Rating: 38 (100%+)
Default

Parts in the post here. Pics a few posts further down. Looks like a total hack job.

http://www.rctech.net/forum/electric...ml#post7120864
or8ital is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Terms of Service