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View Full Version : Speratic shaking @ speeds over 65mph?


West
11-29-2002, 07:25 PM
I got a flat tire the other day going to work and threw the spare on which when I filled it up with air it only had about 20psi in it. After getting a few spare tires I had around on my car the car will shake @ speeds over 65 mph. Its really weird though because it happens speraticly, the car wont shake for 15 seconds and then it will start to shake again for another 15 seconds or so. The car started shaking very mildly after I put my sway bars on and ladder bar, but now after the tires I put on the car shakes like mad. Im clueless to what the problem could be. My Power Steering has been leaking for about 2 months now and I dont have the $ to get it fixed so Im not sure if this has anything to do with it. If anyone has any idea as to what could be causing the problem please let me know. Thanks!

wpayne
11-30-2002, 01:06 AM
Get your wheels balanced. Thats usually what happens when they're not weighted.

West
11-30-2002, 01:38 AM
Arent they suspose to do that when you get your tires put on anyways?

Chew Slice
11-30-2002, 01:49 AM
whenever i got new tires, they never did it, I had to tell em.  I'd definately try that first cause its pretty cheap and usually fixes the problem.  I wouldve also said brakes but since it comes on only sometimes I'd most likely rule that out

DSC
11-30-2002, 02:36 AM
running the smaller spare could have damaged your, umm shit what is it, cv joint?

I'd try ballance, then alignment, then see if having the spare on could have damaged anything.

silvia lover
11-30-2002, 12:53 PM
i have a similar problem, but the weird thing is, the car will try to turn to one direction like, to turn right(and i can feel the steering wheel moved when it happened, and i have to hold on to it so it won't turn to that direction <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/devil.gif" border="0" valign="absmiddle" alt=':devil:'> )but a while later, it most likely want to turn to the left, and then turn to right again. i have no idea what is going on, and that's why i don't drive on the freeway so much. &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'> &nbsp;and i have change all four tires and have been balance it already, and i did the ailgenment thing, but i'm not sure they did all 4 wheels or just the front though <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/unhappy.gif" border="0" valign="absmiddle" alt=':unhappy:'> any idea what is going on guys?

guidot
11-30-2002, 04:06 PM
Techincal Service Bulletin from 240sx.org

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Steering Wheel Shimmy
Classification:
ST93-002

Section:
Steering

Reference:
TECHNICAL BULLETIN NTB93-066

Models:
All 240SX(S13)

Date:
April 1, 1993

240SX(S13) STEERING WHEEL SHIMMY

APPLIED MODELS:
All Model Year 240SX(S13)

APPLIED VIN; HICAS; DATE:
JN1HS34N(*)W300146 - Coupe; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; HICAS=no; 6/4/92
JN1HS36N(*)W300198 - H/B; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; HICAS=no; 6/4/92
JN1HS34N(*)W300384 - H/B; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; HICAS=Yes; 6/12/92.
JN3HS &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;- Convt.; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;HICAS=no;.

SERVICE INFORMATION:
Some owners of 240SX vehicles built before the Applied VIN may complain about steering wheel shimmy while driving at approximately 55 mph. The wheel shimmy complaint can usually be resolved by balancing the front tires. However, in those cases where the complaint is not resolved by this repair, adjustment of the steering rack friction may be necessary.

SERVICE PROCEDURE:1. Road test vehicle to verify that the customer's complaint is steering wheel shimmy [slight rotational vibration of the steering wheel at approximately 55 mph] and that it occurs without braking.

2. Verify that the steering rack, rods, and joints are secure and the steering system is within specification.

3. Balance the front tires with an on-car balancer, if available; otherwise, use a calibrated off-car dynamic balancer.

4. Perform another road test of vehicle. If shimmy is not resolved, it will be necessary to adjust the steering rack friction.

5. Remove the steering rack adjusting screw. Clean the adjusting nut of any remaining locking sealant. Reassemble the lock nut to the adjusting screw with the lock nut backed off fully.

6. Replace the spring with P/N 48237-10V02. This is a direct replacement, original-equipment part. Be sure the spring washers remain in place, in the same orientation.

7. Coat the adjusting screw with Loctite 272 Threadlocker or equivalent and screw into the rack. Tighten the lock nut finger-tight.

8. Torque the adjusting screw to 43-52 inch-pounds.

9. Loosen the adjusting screw, then, lightly tighten by hand.
NOTE:
The actual torque value for this screw is 0.43 to 1.74 inch-pounds.

10. Move the rack through its full travel, left and right, several times.

11. Center the rack in the "straight-ahead" position. With road wheels off the ground, turn the steering wheel a half turn in each direction to find the maximum friction spot. Stop at the maximum friction spot.

12. Loosen the adjusting screw, then torque screw to 43-52 inch-pounds.

13. Loosen the adjusting screw approximately 40 degrees (just shy of 1/8 turn).

14. Prevent movement of the adjusting screw and torque the lock nut to 29-52 inch-pounds.

15. Test drive on a level road to verify that the steering wheel returns to center when the steering wheel is released from a turn (approximately 20 degrees). Also, verify that the steering shimmy was corrected by driving on the road surface where the incident was diagnosed.

16. If less pre-load is needed (to achieve steering wheel return-to-center after a turn)- based upon the results of the test drive detailed in Step 15, you may loosen the pre-load position of the adjusting screw, up to the 90 degree position.


Or, if more pre-load is needed to reduce shimmy, you may tighten the adjusting nut up to the 20 degree position.

NOTE:
The pre-load range of adjustment is 20-90 degrees loose, from the baseline established at Step 11.

17. Road test, again, to confirm shimmy complaint is resolved and steering wheel will return to center after a turn.

18. If the above procedure is not successful, please call the FIXS Hotline for assistance.


PARTS INFORMATION:

NOTE
This is a standard replacement part number; it is not a countermeasure/revised part.

Part Description &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Free Length &nbsp; &nbsp; Part Number
Spring-Retainer &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 27.9 mm &nbsp; &nbsp; &nbsp; &nbsp; 48237-10V02</td></tr></table><span id='postcolor'>

Hope that may help some if not all of you with s13's.

240meowth
11-30-2002, 11:22 PM
you might want to do an alignment, my car use to shake like hell till i got my alignment. &nbsp;and i notice that you've done some suspension work. &nbsp;it's always a good idea to get alignment after suspension work &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

West
12-01-2002, 12:21 PM
Cool, I swapped my front wheels from Boostaholics wrecked 240. Fixed the problem, although I do need an alignment anyways <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>