So I am in the process of doing a trail gear 4 inch spring swap to my truck.

https://www.yotatech.com/forums/f116/rear-lift-165376/

I noticed that my pinion flange was much harder to turn. I thought it might be because its in the axle and I have a locker but it just doesnt seem right. I have a hard time even moving it to feel back lack. Upon further inspection i noticed that the nut had moved. The place where you deform the nut into the notch on the pinion was not where it was before. I would appear that it tightened itself up. I know I had it where it should be or darn close when I put the gears in Last year labor day weekend. Has anyone heard of this happening and what should I do. Just back of some on the nut. I dont really want to completely disassemble everything.

 

Is it a solid spacer rear end or a crush sleeve ?

Solid spacer, bring it back to torque and re-stake the nut + red locktight.

Crush sleeve, tear it down, check your setup and install a solid spacer.

Just my .02

 

x2, on not backing off the nut and leaving it if you used a crush sleeve

 

I think I will just back of a bit on the nut. It didnt move that much. Just enough to releave some of the tension on the bearings.

 

never heard of a nut tightening! Always seen them back off, or fall off in my case on one of the old fords i had lol.

 

Ok my guess you hit the pinion flange or driveshaft enough to cause the crush sleeve to give a little, and then the nut followed.

Good luck with the loosening thing.

BTW. In my opinion your gonna run into alot of problems with a lunchbox and 35's.

 

If it's a solid spacer, the shims are there to adjust the bearing preload. Torque on the nut has nothing to do with it (unless you start stretching the pinion while tightening the nut ) When I rebuilt my 3rd on the '93 I used to have, I used a solid spacer with the correct shims, and torqued the pinion nut to approx 200ft-lb with red lock-tight.

 

Last friday I went ahead and pulled the diff out of the axle. it was a fairly quick job since the axle was out of the truck anyways. It wasn't the crush sleeve thankfully. The backlash was non existant. Im glad I took it apart. I had it set when I put it together but it changed somehow. Has anyone heard of this happening. I think I remember hearing that one of the drawback of the toyota diff since it does not use shims is that the backlash can somtimes get out of adjustment but I am not sure. Anyways problem solved.

 

If you left good carrier bearing preload, put the locking tabs back in place on the carrier adjusters, and had the inner pinion bearing and race seated tightly in place when you set up your gears, your backlash should not have changed.

 

Yeah. Im not sure why it changed. Its possible I made a mistake when i put it together the first time. It was my first time doing gears. Luckily I caught it before too long.

 

yes this has happend to me too many times, I blame it on hard core wheeling and poor preload setups.

This is the reason it should of been hard to turn freely:

 

Wow. I didnt have that problem thankfully. Pinion was fine just the backlash was off.

 

so you backlash was too tight then eh.......



My prevoius picture is what happens when the crush sleeve get crushed a lot more.

Check this out:

 

Oh wow. Yeah back lash was too tight. Is that what the picture above is the result of.

 

The picture of the pinions standing side by side with a shaft sheared off is the result of not enough slip in the front drive shaft.

While wheeling in the most hardcore trail at Elbe Hills the "Busy Wild" I lost.

WHY? I exteded my front DS with with some random pipe in my scrap steel bucket, utilizing the stock 7" slip yoke. With my frame on jack stands and letting the SFA fall to full droop the DS would fall apart, there just was not enough slip, i could not extend it more in any way I needed the splines to be longer.

I went wheeling anyways and broke stuff

sqaure shaft FTW