Putting new gears in 14 bolt semi float 9.5, new pinion, new bearings, new everything for axle. Setting pinion pre load I am not crushing the crush sleeve. I am at 30 inch pounds of rotation for preload which is correct(25-35 for new bearings). However, the crush sleeve is not crushed. Everything is tight, no play, bearings look set in races. What is going on? Ordered evrything from East Coast Gear with all correct parts. What am I doing wrong?
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
K5 Gm 14 bolt semi float 9.5 pinion gear problem
- Thread starter howd2515
- Start date
The sleeve will take a lot more to crush, then you check the preload.
If Im at correct preload now how is tightening more going to help? If I try to tighten any more the pinion will not spin at all. Crushing the sleeve brings the bearings tighter into their races to set preload but I am already at preload. Are their different sizes of crush sleeves for a semi float 9.5?
There might be, or the current one you hsve could be made out of spec. Unfortunately since the scamdemenic manufacturing has gone to
$*&t.
I would recommend a crush sleeve emliminator kit. Yukon gear probably makes one for that diff.
Very small amount of clearance clay on current crush sleeve to check if it's making contact on both sides. You need that support or the bearings will fail prematurely.
$*&t.
I would recommend a crush sleeve emliminator kit. Yukon gear probably makes one for that diff.
Very small amount of clearance clay on current crush sleeve to check if it's making contact on both sides. You need that support or the bearings will fail prematurely.
My first guess would be that the races aren't fully seated. There could be a burr or something. Did you compare all of the parts side by side before installing? It's possible there is an old and new design where some dimensions on the pinion changed. Something changed around 2000 and then in 2014 it became the new 12-bolt and it's the same as the Chrysler 9.25 IFS.
Like Wes said, “Crush Sleave Eliminator” why work so hard?
Even if the preload drag is correct, you have to also achieve the proper torque on the nut to keep everything tight. Yukon lists the crush sleeve as 0.64" for 1980-2017. What is the thickness of the old one and the new one? It's possible you can measure the race or race/bearing thickness in the case to compare with the old ones. If it was mine, I would probably take it apart again and compare each component old for new to see what's different.
You don't hear this talked about much, but one approach is to use the old crush sleeve. If it's a little tight, you just crush it more. If it's a little loose, you add a shim and then crush to spec (assuming you have some).
You don't hear this talked about much, but one approach is to use the old crush sleeve. If it's a little tight, you just crush it more. If it's a little loose, you add a shim and then crush to spec (assuming you have some).
If I new the correct year and model diff he has I might be able.
I know d44 and 77 14bff, 01 14bff are available. I have them in my diffs
I know d44 and 77 14bff, 01 14bff are available. I have them in my diffs
My 10.5 FF corporate 14 bolt is one of the newer models, with fins cast into the housing. It requires special brackets for the disc brake conversion.
I had to special order an aftermarket crush sleave eliminator for it because the one in the kit wouldn’t fit over the pinion shaft, too much girth
I had to special order an aftermarket crush sleave eliminator for it because the one in the kit wouldn’t fit over the pinion shaft, too much girth
I don't think they make one for the 9.5".
He said girth
They don't make an eliminator for the 9.5. I will take everything apart again and check races with a feeler guage. I have the old pinion gear but not the crush sleeve. I can try setting up the old pinion gear and see what happens. I have read somewhere that the 9.5 semi float does not use a crush sleeve that the nut sets preload. It would make sense as that is what is happening but I will double check.
I just went through this setup. Could it be the races aren’t down all the way?
I actually over tighten the nut during final assembly just by a little bit
I would take it apart and double check everything.
I actually over tighten the nut during final assembly just by a little bit
I would take it apart and double check everything.
I really hate being the bearer of bad news.
But, you’re going to have to totally disassemble that differential and start over. This time pay lots of attention to where and how the bearing races go in.
But, you’re going to have to totally disassemble that differential and start over. This time pay lots of attention to where and how the bearing races go in.
Do you have a crush sleeve in there now?
You have a 9.5 semi float?
Yes, 9.5" uses a crush sleeve.
It's weird that nobody brings a spacer and set of shims to market for an axle that spans 4 decades. You would almost think there are parts on McMaster-Carr that would do the job, or combined with a shim kit that's intended for another application.
It's weird that nobody brings a spacer and set of shims to market for an axle that spans 4 decades. You would almost think there are parts on McMaster-Carr that would do the job, or combined with a shim kit that's intended for another application.
Correct diameter shims and a lathe and it's a dine deal.
OP what is the pinion diameter whete the crush sleeve rides?
Crudh sleeves are the mfr speed cheat, all should be shimmed
OP what is the pinion diameter whete the crush sleeve rides?
Crudh sleeves are the mfr speed cheat, all should be shimmed
