Unit bearings

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Jul 23, 2011 | 10:39 AM

74baja

Thread Starter

Elder User

Joined: Oct 2007

Posts: 672

Likes: 0

From: NJ

Unit bearings

Hey Folks,

I'm pretty sure my front passenger's side main bearing is going out. I lost the driver's side about 20k miles ago, now I feel/hear some similar rythmic clunking from the passenger's side. I'd like to be totally sure before ordering the part though. Could it be the other bearing up there (needle bearing?) Also, I was advised to buy the Timken assembly from rockauto. I'm SRW 4x4, but they have one with fine thread studs and one with coarse thread studs (coarse is about $15 more.) Are these the wheel studs? How can I be sure which I have?

Thanks,
Jack

Jul 23, 2011 | 12:08 PM

arto_wa

Tuned

Joined: Sep 2006

Posts: 436

Likes: 51

From: Southwest WA

Wheel studs

The fine thread studs have 1.5 mm pitch, the coarse threads have 2.0 mm pitch.
Just measure the thread pitch to see which ones you have, the difference is obvious.

Jul 23, 2011 | 12:44 PM

Ford79

Lead Driver

Joined: Mar 2000

Posts: 9,359

Likes: 1

From: Hampstead, NC

Quote:

Originally Posted by 74baja

Hi Jack, yes the wheel studs is what they are talking about. Your truck should have the coarse thread wheel studs. I believe the change was made in 2002 to fine thread.

Best way to know for sure is to check a wheel stud with a pitch gauge.

Jul 23, 2011 | 01:49 PM

HD Rider

Cargo Master

Joined: Aug 2009

Posts: 2,137

Likes: 13

From: Glendive, MT

If you want to be sure, they are not that hard to pull so you can check the needle bearing. I got Timken's at my local NAPA but had to ask for the USA made units. They also offer a cheaper one made in china. They had both in stock.

Jul 23, 2011 | 01:59 PM

DND58

Laughing Gas

Joined: Jan 2007

Posts: 870

Likes: 9

From: Carbondale, CO

Best to check the pitch. Maybe buy a couple lug nuts, corse & fine if you dont have a pitch gauge. Mike said in post 43 his 03, 250, 4X4 had fine threads studs in this thread. Hope this helps.

https://www.ford-trucks.com/forums/1...g-apart-3.html

Jul 23, 2011 | 02:23 PM