Duramax Diesels Forum Truck of the Week
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Old 10-15-2006, 12:21 PM
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Default How To: Replace Front Wheel Bearing Assy on 2500HD/3500SRW (dually similiar):

Preface: If you are running oversized tires, high hp, or subjecting your truck to extreme shocks on the front, like drag racing or sled pulling, your front wheel bearings will not last much past the 36k mi warranty.

You can tell if the wheel bearing is shot by jacking the truck up til the wheel is off the ground, grabbing the top and bottom of the tire and try to pry it in and out. ANY movement is wear. A stocker will not move. Ours were worn to the point of more than 2" slop at the tire with 50,000mi on the truck. You can drive pretty far worn bearings without fear of the wheel departing the truck due to the captive design of the unit.

This is a sealed bearing assy that includes the hub, lug bolts, bearings, axle spline, wheel speed sensor, and cable. GM has recently updated the part number to #15225770 or AC Delco #FW289. Retail for the unit can be as high as $450 ea, to a low of $150 ea, so it pays to shop around.

Let's Begin/

What you will need:



You will need:

Floor jack
Jack stand
15mm socket and ratchet, wrench will work if you are strong.
21mm socket and BIG ASS breaker bar. Cutting torch will have better luck than a wrench on this *****.
36mm socket and breaker bar. Nut is actually 35.5mm, so a 1 3/8" socket can be beaten on it.
Sharp flat blade screwdriver.
Hammer.
Pliers.
Large C-Clamp.
Grease.
Loctite - Blue. Unless you're selling it, then use red. Blue allows for removal in the future, red is REALLY aggressive.

In picture, not absolutely necessary - impact wrench.

Not in picture, something a foot tall and will support 20lb, like a toolbox. And about 3 beers per side.

Step 1:



Jack side of truck up, and put a jackstand under it. Use frame rail.
Turn ignition to ON position and put in 4wd Hi, and set parking brake.
Remove Wheel.

Step 2:



Unplug the wheel sensor wire near the top of the shock. There are 4 push in wire retainers, you will not save them, so rip them out with pliers. You can cut off the wire if you think it will get in your way.

Step 3:



Use C-Clamp to compress the brake pistons so it will be easy to reinstall.


Step 4:



There are 2 loctited 21mm head bolts that hold the brake caliper frame to the axle support. THESE ARE TIGHT!!! Rotate the steering to get to them easier. Remove the bottom, then loosen the top one so you can remove it with your fingers. You will need to have something ready to support it when you remove the brake assy.

Step 5:



Pull the top bolt and set the brake assy on something that will not stress the brake line. You can destroy a brake line by hanging that much weight on it.

Step 6:



In this picture, the lug at 11 o'clock and 5 o'clock have a retaining washer that holds the disc on the hub for assembly purposes. Remove these by rotating them with a screwdriver, then pry them off. You do not need these, I suggest you throw them away. Once they are removed, you can pull the disc off the hub. If it does NOT come off easy? Torch and a mallet. Do not hit the rotor with a steel hammer or you can burr it up.


Step 7:





Pry the center dust cover off with a sharp flat blade screwdriver. Be fairly gentle as you will reuse this. It's not REALLY necessary, and serves no function whatsoever, but it looks prettier than the axle nut.
Step 8:



That nut in the center keeps the axle from wandering too deep into the differential. Other than that, it does nothing. It is not a load component. It measures 35.5mm, you can remove it with a 36mm socket and breaker bar or tap a 1 3/8" socket onto it. If the truck is in 4WD with the truck in park, it will not spin the hub. The nut is a locking nut, so it will be tight most the way off.

Step 9:



Once the nut is off, spray some WD40 into the center spline, then tap the axle into the hub gently until it stops. It will move about 1". This will make it easy to pull the hub off when it's time.

Step 10:





There are four 15mm bolts that hold the hub on. These are also pretty tight. If you turn the steering, it makes them easier to remove.


Step 11:



The hub should slip right out. You might have to tap the axle a bit more while holding the hub out from the base. Clean all mating surfaces, grease the axle spline and o-ring in base. Dust shield faces forward.

INSTALLATION







IMPORTANT TORQUE SPECS

Hub and Bearing Assembly to Steering Knuckle Bolts - 180 Nm / 133 lb ft
Axle Shaft Nut - 210 Nm / 155 lb ft
Caliper Mounting Bracket to Knuckle, Front - 300 Nm / 221 lb ft


Here's the new hub/bearing assy. There is some electrical tape on the wire holding them together, tear it off.

Line up the spline to the holes with the wire at TDC. If the bolt holes do not line up, you can either take the truck out of 4WD, or pull it off the spline and try to align it better. I suggest align it better. There is a lot of slop in the axle rotation, so you don't have to precisely get the right tooth on the spline for it line up. Screw the axle nut on by hand to hold it in place.

Use a few drops of Blue Loctite (yes I know it comes in a red bottle ) on the 15mm bolts, and bolt the hub back down. Don't forget the dust shield. The wire goes UNDER the tab on the dust shield.

Tighten down the axle nut and washer on the axle. Tap the dust cover back on with the handle of the hammer.

Replace the rotor.

Hold the brake pads apart with your fingers and slide the brake assy onto the rotor. Use loctite and reinstall the two 21mm bolts. Do I know the torques? Uh... REAL tight?

Snap the 4 wire holders into the same holes the old one came out of, and reconnect the connector near the shock.

Put wheel back on, lower truck..

IMPORTANT

Start engine and pump the brakes slowly several times. When you pushed the pistons back into the calipers, they are still sitting far away from the rotors and YOU WILL HAVE NO BRAKES.

Road test, and finish the last beer.
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Wendy 06 GMC LBZ CC/SB EFI "Rat Posion", Sun Coast trans, SC 1057 & Transgo JR by MikeL, true downpipe, Banks Ram-Air SD sleeves 12.50 @ 107.51


Big Blue04 GMC LLY 3500 SRW CC LB 4x4 DA Big Blue 13.12 @ 103.93 466RWHP/928TQ. PPE LLY extreme tune, VA Box, SC III by Inglewood Trans, 4" straight pipe, Super Diesel Tie Rod supports and Manifold, Trippin Pickup, Cognito Braces, FuzzyDice.

McRat's toy-2005 GMC "Casper 2" 2500HD 4wd Xcab SB Mike L. LLY 2 trans, McRat tuning 10.59 @ 128.9



Last edited by McRat; 03-31-2008 at 05:37 PM.
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  #2  
Old 10-28-2006, 05:47 PM
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Where can I get them for $150??
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Old 10-28-2006, 06:12 PM
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We bought ours at gmpartsdirect.com but I would check rockauto also, I think that is where brewmax got his.
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Blue Meanie 02 Z06 11.36 @ 120.67 448 rwhp/411 tq AFR H/C

Wendy 06 GMC LBZ CC/SB EFI "Rat Posion", Sun Coast trans, SC 1057 & Transgo JR by MikeL, true downpipe, Banks Ram-Air SD sleeves 12.50 @ 107.51


Big Blue04 GMC LLY 3500 SRW CC LB 4x4 DA Big Blue 13.12 @ 103.93 466RWHP/928TQ. PPE LLY extreme tune, VA Box, SC III by Inglewood Trans, 4" straight pipe, Super Diesel Tie Rod supports and Manifold, Trippin Pickup, Cognito Braces, FuzzyDice.

McRat's toy-2005 GMC "Casper 2" 2500HD 4wd Xcab SB Mike L. LLY 2 trans, McRat tuning 10.59 @ 128.9



Last edited by Kat; 10-28-2006 at 06:21 PM.
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Old 10-28-2006, 11:29 PM
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You might also check with Dal Slabaugh GM Parts Toll Free (877) 448-5451 email: lockitup@bright.net. Dal usually has just about the same prices as gmpartsdirect but doesn't charge as much for shipping. But just so you know he is a very busy guy but damn knowledgable on parts. Last couple of times I ordered from him I gave him the part numbers and my CC number and didn't even ask for a total, he's that good.
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Old 10-28-2006, 11:33 PM
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Quote:
Originally Posted by Poltergeist View Post
You might also check with Dal Slabaugh GM Parts Toll Free (877) 448-5451 email: lockitup@bright.net. Dal usually has just about the same prices as gmpartsdirect but doesn't charge as much for shipping. But just so you know he is a very busy guy but damn knowledgable on parts. Last couple of times I ordered from him I gave him the part numbers and my CC number and didn't even ask for a total, he's that good.
Thank You Rob,

Glad that number will be in here for future reference I'm always buying stuff from gmpartsdirect and looking at the shipping and going
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Satan 2010 ZR1


Blue Meanie 02 Z06 11.36 @ 120.67 448 rwhp/411 tq AFR H/C

Wendy 06 GMC LBZ CC/SB EFI "Rat Posion", Sun Coast trans, SC 1057 & Transgo JR by MikeL, true downpipe, Banks Ram-Air SD sleeves 12.50 @ 107.51


Big Blue04 GMC LLY 3500 SRW CC LB 4x4 DA Big Blue 13.12 @ 103.93 466RWHP/928TQ. PPE LLY extreme tune, VA Box, SC III by Inglewood Trans, 4" straight pipe, Super Diesel Tie Rod supports and Manifold, Trippin Pickup, Cognito Braces, FuzzyDice.

McRat's toy-2005 GMC "Casper 2" 2500HD 4wd Xcab SB Mike L. LLY 2 trans, McRat tuning 10.59 @ 128.9


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Old 02-10-2007, 07:26 PM
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Dal is the man. He is who I get my GM stuff from. He will treat you right.
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Old 06-16-2007, 06:01 AM
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This is the part I like, "If you are running oversized tires, high hp, or subjecting your truck to extreme shocks on the front, like drag racing or sled pulling, your front wheel bearings will not last much past the 36k mi warranty."
And the answers are, Yes, Yes, Yes, Yes, and Yes. So I must be one of the lucky ones, as I got about 100,000 past warranty before mine showed signs of biting the big one.
100+ boosted 4X4 lanches, 17 hooks to the big sled, 35" tires, 400-500 rwhp, and many, many miles at road development sites, and 1,000's of miles of back road driving much faster than I should be driving.........
This is the first out of pocket repair on my truck in over 5 years, and 130,000 miles.
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Old 05-03-2008, 09:55 AM
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ttt
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2005 GMC 2500HD LLY "Casper"- LLY O/S 8758. 10.59 @ 129. EFILive "2CP3" Tuning, Mike L Suncoast Trans. PPE Dual CP3's, GT4202R.
2004.5 GMC 3500 SRW LLY "Big Blue" - LLY O/S 1668. 13.12@103. Powered by PPE/VA with Mike L Suncoast Trans.
2006 GMC 2500HD CC/SB LBZ "Wendy"- LBZ O/S 6128. 12.50 @ 107.x. EFILive tuning, Mike L trans.
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Old 06-06-2008, 02:05 PM
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Summit sells front hub assemblys for $158
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Old 06-06-2008, 06:04 PM
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what kind are they
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Old 06-07-2008, 09:44 AM
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Wheel bearings Inc.

http://store.summitracing.com/partde...5&autoview=sku
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Last edited by Bako_Dmax; 06-07-2008 at 09:47 AM.
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Old 07-30-2008, 03:46 PM
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any body got the new number for Dal Slabaugh GM Parts ? the one listed above has been disconnected.

thanks
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Old 08-01-2008, 10:04 AM
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Quote:
Originally Posted by SSDuramax View Post
any body got the new number for Dal Slabaugh GM Parts ? the one listed above has been disconnected.

thanks
I don't know if this # 15946732 will help. But this is one the dealer just used to replace mine in Wendy
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Satan 2010 ZR1


Blue Meanie 02 Z06 11.36 @ 120.67 448 rwhp/411 tq AFR H/C

Wendy 06 GMC LBZ CC/SB EFI "Rat Posion", Sun Coast trans, SC 1057 & Transgo JR by MikeL, true downpipe, Banks Ram-Air SD sleeves 12.50 @ 107.51


Big Blue04 GMC LLY 3500 SRW CC LB 4x4 DA Big Blue 13.12 @ 103.93 466RWHP/928TQ. PPE LLY extreme tune, VA Box, SC III by Inglewood Trans, 4" straight pipe, Super Diesel Tie Rod supports and Manifold, Trippin Pickup, Cognito Braces, FuzzyDice.

McRat's toy-2005 GMC "Casper 2" 2500HD 4wd Xcab SB Mike L. LLY 2 trans, McRat tuning 10.59 @ 128.9


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Old 10-30-2008, 07:13 PM
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New P/N's:

FW338 ACDelco
GM 15946732
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2005 GMC 2500HD LLY "Casper"- LLY O/S 8758. 10.59 @ 129. EFILive "2CP3" Tuning, Mike L Suncoast Trans. PPE Dual CP3's, GT4202R.
2004.5 GMC 3500 SRW LLY "Big Blue" - LLY O/S 1668. 13.12@103. Powered by PPE/VA with Mike L Suncoast Trans.
2006 GMC 2500HD CC/SB LBZ "Wendy"- LBZ O/S 6128. 12.50 @ 107.x. EFILive tuning, Mike L trans.
Pat and Kat McSwain
"Casper" - Record Holder, Bonneville & El Mirage. Best Clocked Speed 197mph, Bonneville '09.
"World's Fastest Production Diesel Pickup - 174.586mph"
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  #15  
Old 03-25-2009, 09:37 PM
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Just bought 2 more that are OEM replacements for Blue $264. I will let everyone know what Pat thinks of them when the arrive.

http://gmc-car-parts.macautoparts.ne...=515058&page=1
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Satan 2010 ZR1


Blue Meanie 02 Z06 11.36 @ 120.67 448 rwhp/411 tq AFR H/C

Wendy 06 GMC LBZ CC/SB EFI "Rat Posion", Sun Coast trans, SC 1057 & Transgo JR by MikeL, true downpipe, Banks Ram-Air SD sleeves 12.50 @ 107.51


Big Blue04 GMC LLY 3500 SRW CC LB 4x4 DA Big Blue 13.12 @ 103.93 466RWHP/928TQ. PPE LLY extreme tune, VA Box, SC III by Inglewood Trans, 4" straight pipe, Super Diesel Tie Rod supports and Manifold, Trippin Pickup, Cognito Braces, FuzzyDice.

McRat's toy-2005 GMC "Casper 2" 2500HD 4wd Xcab SB Mike L. LLY 2 trans, McRat tuning 10.59 @ 128.9


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