17LikesTekno SCT410 Thread
10-03-2013 | 03:45 AM
Tech Master
iTrader: (41)
Joined: Nov 2011
Posts: 1,236
From: Coral Gables
I have a question regarding my front and rear diffs. Now that I'm about half way into the build, I'm second guessing the shim placement on my front and rear diffs. Both diffs turn smoothly if I turn either side of the outdrive, on both front and rear. There's no binding or spots that it's not smooth. They both turn easily.
What I'm second guessing is how noisy both the front and rear diffs are. There is a little "growl" to them as I spin the diffs.
Is this normal since they are new?
Will they become less noisy as they are getting broken in?
Should I disassemble the diffs and try re-shimming them?
Like I said, they both spin smoothly and easily with no binding! Just a little worried about how noisy they are. I don't recall if my diffs were that noisy on other kits I've assembled.
Thanks in advance for your input and help!
What I'm second guessing is how noisy both the front and rear diffs are. There is a little "growl" to them as I spin the diffs.
Is this normal since they are new?
Will they become less noisy as they are getting broken in?
Should I disassemble the diffs and try re-shimming them?
Like I said, they both spin smoothly and easily with no binding! Just a little worried about how noisy they are. I don't recall if my diffs were that noisy on other kits I've assembled.
Thanks in advance for your input and help!
sounds like a freight train coming down the straight!
10-03-2013 | 04:09 AM
10-03-2013 | 06:23 AM
I agree with the other guys it is loud but without hearing the exact noise its difficult to tell whether its the optimal meshing but I suggest starting with 0 shims and see how it spins and then add 1 and soon but you need to screw the housing together each time you add because this effects the mesh. you probably need atleast 1 shim but the new kits have a lot better tolerances, I didnt use any on my eb48.2 but I have 1 on each side on my SCT. Chances are you are fine but you can make it a little "less" loud ha
10-03-2013 | 07:00 AM
Tech Elite
Joined: Oct 2011
Posts: 2,069
What would be the consequences of using no shims even if it needed say 2 of them? Other than getting them lined up you can do a diff removal and re assembly in a few mins. Say if you want to make a change during race day would it be cool to leave it unshimmed for the remainder of the race day?
10-03-2013 | 07:54 AM
What would be the consequences of using no shims even if it needed say 2 of them? Other than getting them lined up you can do a diff removal and re assembly in a few mins. Say if you want to make a change during race day would it be cool to leave it unshimmed for the remainder of the race day?
Depending on how off the tolerances are in the diff case you could have enough play that the ring and pinion will wear faster , or in extreme cases they could skip after they wear some more ......
10-03-2013 | 08:17 AM
Does the sharp angle of the rear diff wear the drive line pins faster than the new one with less angle? I bought my truck as a roller and it came with worn pins. I replaced them and had lots of wear on them in one weekend.... Front has no problems since it is straight
10-03-2013 | 08:46 AM
Does the sharp angle of the rear diff wear the drive line pins faster than the new one with less angle? I bought my truck as a roller and it came with worn pins. I replaced them and had lots of wear on them in one weekend.... Front has no problems since it is straight
Yes. The angle rear diff case is much better for pin and outdrive wear.
10-03-2013 | 08:52 AM
Does the sharp angle of the rear diff wear the drive line pins faster than the new one with less angle? I bought my truck as a roller and it came with worn pins. I replaced them and had lots of wear on them in one weekend.... Front has no problems since it is straight
10-03-2013 | 09:06 AM
What would be the consequences of using no shims even if it needed say 2 of them? Other than getting them lined up you can do a diff removal and re assembly in a few mins. Say if you want to make a change during race day would it be cool to leave it unshimmed for the remainder of the race day?
Yea the new rear angled housing/bearings are amazing, well worth it.
10-03-2013 | 12:01 PM
What would be the consequences of using no shims even if it needed say 2 of them? Other than getting them lined up you can do a diff removal and re assembly in a few mins. Say if you want to make a change during race day would it be cool to leave it unshimmed for the remainder of the race day?
10-03-2013 | 01:07 PM
