R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 06-27-2009, 09:28 PM   #1
Tech Apprentice
 
Join Date: Mar 2007
Posts: 74
Default MBX6 pinion gear scraping the diff case

Anyone else had a problem with the pinion gear scraping the diff housing? The diff is shimmed properly, so I can't figure out why this is happening. (Both front and rear).

Thanks in advance!
glolar is offline   Reply With Quote
Old 06-27-2009, 10:07 PM   #2
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

Diff housing or diff cup? If its the cup did you squeeze the pinion & CV joint together when you tightened the set screw? The pinion should not be able to move back & forth in the bearings but not so tight it puts a constant side load on the bearings. If its the diff housing also called bulkhead then I have no idea.
butch man is offline   Reply With Quote
Old 06-27-2009, 10:57 PM   #3
Tech Addict
 
Join Date: Oct 2008
Posts: 604
Trader Rating: 1 (100%+)
Default check screws

Quote:
Originally Posted by glolar View Post
Anyone else had a problem with the pinion gear scraping the diff housing? The diff is shimmed properly, so I can't figure out why this is happening. (Both front and rear).

Thanks in advance!
hi mate, building my front diff i and then covering the bulk head. i broke the car in but failed to notice the screw in the bulkhead/ diff housing came slightly loose.

when i checked the front diff, there was some scratch as u described.


when the diff housing is loose , i think that will happen
muaythai is offline   Reply With Quote
Old 06-28-2009, 06:29 AM   #4
Tech Elite
 
Join Date: Mar 2009
Posts: 3,657
Trader Rating: 5 (100%+)
Default

this was one problem i did have. No matter how much i shimmed or tighted the bevel and joint cup together the teeth of the bevel would dig in the diff cup. Actually that's not true. I did not have it shimmed right, then finally got the right shimming but the plastic pieces were still stuck in the conical gear. So i had to dremmel off that part of the diff cup. And at first i had the problem of the conical hitting the housing too.


The best answer??? Sand the shit out of all diff cups and housing's before assembly. THis will save you mucho headaches


oh this only happened on my front diff BTW.
dreaux is offline   Reply With Quote
Old 06-29-2009, 06:38 PM   #5
Tech Apprentice
 
Join Date: Mar 2007
Posts: 74
Default

The black diff housing, not the diff cup. The bevel (pinion?) gear should not be touching the diff housing. Anyone else had this problem, and have a fix, other than dremeling two grooves all the way around the diff housing???

Thanks in advance.
glolar is offline   Reply With Quote
Old 06-29-2009, 06:53 PM   #6
Tech Elite
 
Jammin57's Avatar
 
Join Date: Aug 2006
Posts: 2,374
Trader Rating: 120 (100%+)
Default

I just put together my mbx6t diffs and put them in the bulkheads and both front and rear are rubbing inside the bulkhead I'm not sure where they are rubbing I haven't had time to work on them again
Jammin57 is offline   Reply With Quote
Old 06-29-2009, 07:18 PM   #7
Tech Addict
 
moeman's Avatar
 
Join Date: Mar 2007
Posts: 526
Trader Rating: 26 (100%+)
Default

The ring gear only fits one way in the housings :they are notched for clearance. They WILL rub if you have the ring gear on the wrong side.
moeman is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:34 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net