2000 GT wheel bearing i think

[wlkjr]

Originally Posted by bnaylor3400

I think you are good to go. I'm not about the mess with mine. Yeah, its funny how we are faced with these type problems when doing DIY work and yet it all comes out in the laundry. Murphy's law: What can go wrong will go wrong.

Sometimes I think us DIYers do a better job than the professional mechanics, at least on certain things. I know that a good, honest, competent mechanic is hard to find.

[00GT]

I completely agree. Thats why I'm gonna do this on my own. I'm sure its the right one thats causing the problem, so I think I'm gonna give it a shot doing only that one for now. Thanks for all the good advice guys.

[sirul]

Originally Posted by bnaylor3400

60 ft-lbs is specifed for the hub bolts but that is hard to do.

I was referring to the axle shaft nut. I've seen two figures floating around in the service manuals. 151 ft-lbs and 184 ft-lbs with note 1 which specifies new axle nut. I used a new axle but split the baby at 160 ft-lbs. I checked around locally and I got different answers. Some sounded way out in left field. No problems noted so far. Been installed for over two years now.

Of course this is applicable only to the AC Delco or OEM hubs. Supposedly on aftermarket hubs the manufacturer specifies the torque value.

Hey Bob,

I installed the BCA Nationals on my 99 GTP and they specified 118 ft-lbs per axle. So I did 118. I hope I'm not "under" torqued on them . 184 ft-lbs sound awful a lot, taking in consideration that my big 1/2 inch. torque wrench (Craftsman) only goes up to 150 ft-lbs.

What are your thoughts on this one??

[BNaylor]

Originally Posted by sirul

Hey Bob,

I installed the BCA Nationals on my 99 GTP and they specified 118 ft-lbs per axle. So I did 118. I hope I'm not "under" torqued on them . 184 ft-lbs sound awful a lot, taking in consideration that my big 1/2 inch. torque wrench (Craftsman) only goes up to 150 ft-lbs.

What are your thoughts on this one??

Yeah I agree that 184 is way too much. Thats why I never use that figure. I heard on the BCA brand that the 118 ft-lbs is what they recommend for their brand hub/bearings so hopefully it should be good. I've seen torque figures even lower on certain aftermarket hubs too. As low as 94 ft-lbs.

Its best to use what the manufacturer recommends. On whatever GM recommends on their OEM or AC Delco hubs is still a mystery to me but it is good we are having a discussion to try to clear it up. I went with 160 ft-lbs on AC Delco hubs but with a new axle nut.

[sirul]

Indeed. Lets hear some more opinions and hopely we can figure the "Hub torque Mistery". But for now, wheels are turning quitely

[richtazz]

Axle nut torque values depend entirely on the hub manufacturer. The specified torque "preloads" the bearing, and different designs necessitate different torque values. Stick with what the instructions in the box say. If you under torque, it will allow lateral movement in the hub, creating a howl and/or cracking noise. If you over torque, you can damage the roller bearings or the ABS sensor. Different brand names look different due to their different designs. We sell A/C Delco and PTC here, and they look totally different, and use different torque values (151 for Delco, 180 for PTC).

[BNaylor]

Originally Posted by richtazz

Axle nut torque values depend entirely on the hub manufacturer. The specified torque "preloads" the bearing, and different designs necessitate different torque values. Stick with what the instructions in the box say. If you under torque, it will allow lateral movement in the hub, creating a howl and/or cracking noise. If you over torque, you can damage the roller bearings or the ABS sensor. Different brand names look different due to their different designs. We sell A/C Delco and PTC here, and they look totally different, and use different torque values (151 for Delco, 180 for PTC).

Even the aftermarket hubs have a spotty area on torque values. I know of one brand that doesn't specify any recommended torque value so what do you do then???? Flip a coin?

BTW - The biggest problem I see with overtorqueing the axle nut is stressing out the CV joints on the axle shaft, especially the outer.

[richtazz]

My experience has taught me that if there is no torque value in the box, use the value specified in the repair manual.

[BNaylor]

Originally Posted by richtazz

My experience has taught me that if there is no torque value in the box, use the value specified in the repair manual.

Thats more common sense, however, experience or an assumption doesn't always prove to be correct either. Just how close are these aftermarket hub makers to the OEM specifications unless they happen to be the hub maker GM uses. Companies like Timken take it a step further. On the instruction sheet they specify using the auto maker's torque value as specified in the service manual. Now we are back to one of the topics discussed in earlier posts in this round robin discussion. For the '97 - '03 Grand Prix what torque value is correct 151 ft-lbs or 184 ft-lbs. Both are specified in the Grand Prix service manual at least up to 1999. Just food for thought.