R/C Tech Forums

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

Thread Tools Search this Thread
Old 05-25-2009, 03:35 PM   #16
Tech Addict
Join Date: Sep 2005
Location: Southern CA
Posts: 743

Originally Posted by Larks View Post
With further inspection, I have noticed that there is a bout .100" movement (100 thousandths) in the front cvd forward/backward direction. This allows the gear mesh on the front diff to fluctuate from approx .050" to .100". Is this normal and acceptable?
That should be ok, but keep in mind if you continue to have issues you should try a looser setting. If you have to shim the Active diff or not, might differ based on new bulkhead or used. Also be sure to use plenty of good high density type grease on those gears. The grease will help reduce heat build-up at the pinion gears.

Quick tip: (DO NOT CLEAN WITH LIQUIDS!) The way this bulkhead is designed it doesn't like wet cleaning in the area of the bulkhead bearings, (No WD40, No O'Donnell spray, no simple green). If you do deep clean, you should change the bulkhead bearings more often.

Last edited by CarCrazy; 05-25-2009 at 04:42 PM.
CarCrazy is offline   Reply With Quote
Old 05-25-2009, 05:21 PM   #17
Tech Master
Join Date: Jan 2008
Posts: 1,597

[QUOTE=Larks;5856641]From what I understand, by reading, and simply engineering intuition, the active diff simply releases off power, and locks on. While on power, it should act as a normal differential and the oil viscosity should affect its 'action' in much the same way as it does the normal. While off power, it should release, somewhat 'freewheeling' and the viscosity of fluid should be of a much lesser affect because at this time the gears should not be engaged. I don't see how running thicker fluid should affect 'what it does' anymore then it does in a normal differential. Although a thicker fluid will require massive shimming, others a little, and perhaps for others, none at all.

You have it confused abit. set up is like in a normal diff, except that the 4 small gears sit in a split casing. Off power it acts like a normal diff, so the oil determines how free it is. ON power, the small gears, which are conical on the outer side, are forced outwards as the diff starts to "work" (one wheel spins faster than other) and as they push outwards the casing halves are pushed outwards and the rub on the ring that is placed around the two bigger diff gears. This creates friction and makes it seem like it has thicker oil in it while on power.
JQ is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric 1/8th Scale conversion kits. DJ1978 Electric Off-Road 19930 01-15-2018 12:33 PM
Hpi Pro 4 Barry White Electric On-Road 16066 12-22-2017 02:06 AM
Don't buy MP9 Dale14 Nitro Off-Road 155 03-07-2009 09:28 PM

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 09:41 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net