R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 06-10-2004, 07:27 AM   #1
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default XRAY T1R diff questions

I have completed the assembly of me new T1R kit. And I have read here in the boards to leave the diff loose for a breakin period.

Also...the manual says to tighten the diffs so that they spin freely, but should be hard to turn when holding the output drives.

To me....all of this is very vague.

How hard is "hard to turn"?

How loose is too loose?

Currently i have them, I think TOO loose, where that when the car throttles up (in the house for testing purposes), the car takes a bit to actually to get moving.

So..i guess I need to tighten them down a bit..but what is a good measurement to go by?

Thank you
atlrcracer is offline   Reply With Quote
Old 06-10-2004, 08:41 AM   #2
Tech Elite
 
dr_hfuhuhurr's Avatar
 
Join Date: Aug 2003
Location: Westchester, NY
Posts: 4,503
Trader Rating: 75 (100%+)
Default

You definately have the diffs too loose. If you listen closely you'll hear a screeching noise too. That's your diff balls going bye-bye

When re-building a diff here's the procedure I follow:

1. Assemble the diff per the instructions

2. When tightening the diff, tighten till the balls and diff rings just come into contact. At this point the diff gear can be spun easily while holding the outdrives.

3. Tighten the diff slightly maybe 1/8 of a turn. Hold the outdrives and spin the gear. It should be a little tougher to spin now.

4. Repeat step 3 till it's difficult to spin the gear while holding the outdrives but the diff action (spinning one outdrive while holding the gear) is smooth.

This should get you close. After running a pack through the car, check the diff action and slippage. It may need to be tightened a bit.
__________________
"There is a fine line between hobby and mental illness. Which side are you on?"

“Life is hard; it's harder if you're stupid.” - John Wayne
dr_hfuhuhurr is offline   Reply With Quote
Old 06-10-2004, 09:09 AM   #3
Tech Elite
 
Neil Rabara's Avatar
 
Join Date: Jul 2002
Location: Lone Star
Posts: 4,821
Default Re: XRAY T1R diff questions

Quote:
Originally posted by atlrcracer
So..i guess I need to tighten them down a bit..but what is a good measurement to go by?
The break in period is for the balls to properly seat in the pulley and diff rings. Gradually tighten the diff 1/8-1/4 turn until the diff operates freely without slipping.
Neil Rabara is offline   Reply With Quote
Old 06-10-2004, 08:22 PM   #4
Tech Fanatic
 
evaa's Avatar
 
Join Date: Apr 2003
Location: south of metro manila
Posts: 963
Trader Rating: 7 (100%+)
Default

yep, ur diff is loose

just follow the instructions in the manual when u build the diff. then when its already assembled insert two 1.5mm allen wrenches on opposite outdrives, then try to spin the pulley. if you can spin it, u need to tighten the diff a bit, do this a little at a time till you find it hard to turn the pulley, then try it on the tracks and adjust as needed.
evaa is offline   Reply With Quote
Old 06-10-2004, 09:54 PM   #5
Tech Adept
 
Join Date: Sep 2003
Location: Wisconsin
Posts: 140
Angry Re: XRAY T1R diff questions

Quote:
Originally posted by atlrcracer
I have completed the assembly of me new T1R kit. And I have read here in the boards to leave the diff loose for a breakin period.

Also...the manual says to tighten the diffs so that they spin freely, but should be hard to turn when holding the output drives.

To me....all of this is very vague.

How hard is "hard to turn"?

How loose is too loose?

Currently i have them, I think TOO loose, where that when the car throttles up (in the house for testing purposes), the car takes a bit to actually to get moving.

So..i guess I need to tighten them down a bit..but what is a good measurement to go by?

Thank you
I too am frustrated with the ambiguity with these instructions. I can tell you from experience that they can be too tight since I already toasted my rear diff .
Lano is offline   Reply With Quote
Old 06-10-2004, 11:06 PM   #6
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

Well...all is good now.

I used my heat gun to overome the shock ball end installation.

I found an extra E-clip on the "extra parts" bag, which to me, should have been noted somewhere in the BEGINING of the instructions.

I also found the setup book VERY HELPFUL on getting the diffs set correctly. I adjusted the toe in as well.....

My fukayama cells arrived today and my ESC has been set! Tomorrow will be is 1st test drive. Anyone have any "break in" procedures to follow?

Thanks
atlrcracer is offline   Reply With Quote
Old 06-11-2004, 03:05 AM   #7
Tech Adept
 
Join Date: Sep 2003
Location: Wisconsin
Posts: 140
Talking

Quote:
Originally posted by atlrcracer
Well...all is good now.

I used my heat gun to overome the shock ball end installation.

I found an extra E-clip on the "extra parts" bag, which to me, should have been noted somewhere in the BEGINING of the instructions.

I also found the setup book VERY HELPFUL on getting the diffs set correctly. I adjusted the toe in as well.....

My fukayama cells arrived today and my ESC has been set! Tomorrow will be is 1st test drive. Anyone have any "break in" procedures to follow?

Thanks
Nothing special. You'll need to adjust the diffs several times as they break in. The car stable, fast and built like a tank. Have fun!
Lano is offline   Reply With Quote
Old 06-11-2004, 03:36 AM   #8
Tech Fanatic
 
KY9fat's Avatar
 
Join Date: Aug 2001
Location: Tai Po
Posts: 776
Default Re: Re: XRAY T1R diff questions

For me, I never seen a better instruction manual than the Xray. Unless you start giving out figures/numbers, all descriptive instruction are vague or interpret differently. Dose that means they have to give you torque figures? If you are not familier with setting up diffs, I guess the best bet is ask someone with experience on the track.
Just my 2 cent...
KY9fat is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
diff and slipper adjustment questions builthatch Electric Off-Road 23 01-01-2010 06:47 PM
ball diff questions? Boadazofa Electric Off-Road 1 12-22-2007 02:39 PM
XRAY sedan spring kit / XRAY multi-diff / PRS 114t spur / RR 64p pinions / Stratus evostyle R/C Items: For Sale/Trade 6 12-19-2006 09:33 PM
kanai diff questions and other questions famous182 Electric Off-Road 2 02-25-2006 02:19 PM
XRAY T1FK04, XRC 4.0mm Chassis, One-Way, Diff, Hudy Spring Steel Diff, and MORE! BobbyDoyle R/C Items: For Sale/Trade 10 08-18-2005 04:38 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 05:52 PM.


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