replaced wheel hub/still squealing - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 04-11-2010, 12:17 PM   #1 (permalink)
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replaced wheel hub/still squealing

2001 4x4 7.3 crew cab long bed 177K miles

Last year (march 09) started to get a squealing noise coming from my drivers front. Started when I would turn and eventually made the noise going straight also. I removed the wheel bearing and you could see from the backside it was wiped out. I replaced it and all was well. A couple of weeks ago it started to make similar noises, first only when I turned left, then after a cpl days it started making the noise when I turned rt but not left. last night it got real noisey squealing turning rt and a little when i was going straight. This morning I replaced the wheel bearing under warranty with Napa. ( the wheel bearing I put in originally and this new one are the good ones ,$325.00 SKF unit)
Took the truck for a test drive seemed good for about 10 minutes and then as I was heading home I turned rt and it squealed again. I need some help.
I will also add that the oriiginal unit had a plastic type spacer between the spindle face and the back side of the whell bearing. It was kind of flattened out at the edges. When I asked Napa about it they had no idea what it was or why it was there. This mornning when I removed the wheel bearing this spacer was pretty roughed up on the face that contacts the wheel bearing. when I put the new one in today I left this spacer out. The reason I did was I was thinking maybe the factory used it as a means to make up for some out of spec wheel bearings at that time. The plastic spacer is flat on the bearing side and has 4 groves 90 degrees fron each other on the spindle side.
Thanks in advance for any help with this problem
Jim R
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Old 04-11-2010, 12:45 PM   #2 (permalink)
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That plastic piece with the 4 grooves is there for your auto hubs. The grooves allows the vacuum to pass thru and operate the hubs. Also i'm assuming that the squeal was caused by the spindle bearing in the very back of the hub. Your spindle might of been messed up when you replaced the hub before and if you did not replace the spindle aka axle shaft then that would cause the bearing to go bad again.
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Old 04-11-2010, 01:06 PM   #3 (permalink)
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Visually the spindle looks good. No marks or scratches. I do notice quite a bit of play in the spindle when the wheel hub is off but dont know how much is to much. It will move up and down about 10-15 degrees or so. Do I have to remove the ball joints to replace the spindle bearing?
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Old 04-11-2010, 01:30 PM   #4 (permalink)
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The spindle bearing is part of the hub you have already replaced. Here is a good write up that should help you out alot. Welcome to guzzle's 4x4 Needle Bearing Maintenance Web Page
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2001 F350 Lariet CC dually 4x4 7.3L Powerstroke w/4:10's Two tone black and gold. Mods so far
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DP-tuner F5 (No-start,Stock,1500 high idle,40 tow,60 tow, 80E,120 race, 140)
"SOLD" 1985 F350 Crewcab dually with banks
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Old 04-11-2010, 03:02 PM   #5 (permalink)
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Hey, Thanks for the help I appreicate it. I checked out the site you suggested. So, if my wheel hub is new the spindle bearing should be good. Why am I still getting a squeal I wonder. Could it be the bearing in the knuckle?
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Old 04-11-2010, 05:37 PM   #6 (permalink)
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If you did not reinstall that plastic washer with grooves then your 4x4 hub is gonna be locked. Unless ur hubs have been replaced with manual locking hubs with no auto option. Ur hub could be staying locked and turning ur shaft and your knuckle seal sounds like it could be bad causing the squeal. If that is the case the knucle has to be removed and a new seal pressed in.
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2001 F350 Lariet CC dually 4x4 7.3L Powerstroke w/4:10's Two tone black and gold. Mods so far
AFE STGE2 Intake/ITP KCM S.S. HPX Line/Foil delete/ 6 inch bull hauler stacks/dipricol guages(trans temp,boost,EGT)/ Ported turbo shroud NON-ATS/
DP-tuner F5 (No-start,Stock,1500 high idle,40 tow,60 tow, 80E,120 race, 140)
"SOLD" 1985 F350 Crewcab dually with banks
wastegated turbo and gearvendors under/overdrive. 3.54 gears
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Old 04-11-2010, 10:26 PM   #7 (permalink)
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Quote:
Originally Posted by daveb198 View Post
That plastic piece with the 4 grooves is there for your auto hubs. The grooves allows the vacuum to pass thru and operate the hubs.
That plastic washer is actually a thrust washer that helps locate the axle shaft in relation to the wheel bearing hub assembly. I don't think the grooves are for vacuum, but to distribute grease along the wear face. That washer in back, and the three washers and snap ring on the outer end of the stub shaft are what locate the axle so that the u-joint is centered at the pivot point of the ball joints. Without it, the u-joint could be too far outboard, and when you make a turn, it jumps back and forth (in and out) because it's not centered on the ball joint axis. It could also make the axle bind up the locking hubs and turn when it isn't supposed to be turning.

As far as I know, it's a Ford only part, but may be available from a good driveline shop, as the axle is made by Dana for Ford.
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Old 04-12-2010, 08:47 AM   #8 (permalink)
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Thanks, Well I took it apart again and put the trust washer back in and greased the needle bearing real good. I also put a very thin coat of grease on the thrust washer. Drove 17 miles to work today including some highway mile and no squealing. I'm wondering if the grease is what fixed it. When I replaced the wheel bearing last year with a SKF wheel bearng I did not pack the spindle bearing with grease. I do think I might buy a new thrust bearing and replace mine since the one in there is pretty tore up on the face which is towards the tire.
I do appreciate the help here as always. I like to do my own repairs. plus it saves me a ton of money.

Thanks Jim.
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