I just bought a 92 f150 4x4 302 auto supercab. I noticed that I get a shake coming form the rear of the truck when driving. I need new tires so I just thought is was balancing. The other day I had a load in the back and the shaking changed. So I jacked up the back and pulled and pushed on the tires. They would move in and out about 1/16 of an inch. I didnít notice any movement up and down or left to right just in and out. Does anyone have any ideas what this may be?
I am with superdave and Paul. If you have the 8.8 rear, which you probably do, the movement is normal. IF it really concerns you, you can have someone open the diff and see if the rubber-rings on the ends of the driveshaft are still intact. They kind of buffer the c-clip that holds the axles on the side-gears of the diff. The play is OK since the c-clips are captured and cannot come off the axles (thank-god) but the c-clip itself can take a beating if the play is excessive. 1/16" is not excessive.
Well it is unanimous! It is normal. But, I don't know if I now feel better about it or worse. I would think that on every corner I take it is going to slam. And make it worse. I canít help but think that this is bad. Searching though the post on this forum I have read that axles are known to wear and that there is an ďaxle saverĒ bearing. Could this have any affect on the in/out play? Also how would I find out which rear I have?
[font size="1" color="#FF0000"]LAST EDITED ON 11-Oct-00 AT 11:00 AM (EST)[/font][p]The axle saver bearing isn't for the problem you describe. That is for the wheel bearing side and has to do with bad bearings.
How do you know it's an 8.8? I don't remember how to tell off-hand, but it is most likely an 8.8 if it is a F-150 (vice a 250 or 350).