I have a chance to pick up some 88 front hubs in the JY for my club; I already removed the calipers but the front discs would not come off....So I can go down today with some PB Blaster and a crowbar and gain access.......It would be nice to have the correct socket for the bolts that hold the hub on the spindle.

What type of bolts are they? Are they a 18-20 MM or are they a big Torx like the Brake calipers?

Thanks for any help...(Yes I tried to look it up online......No pics/info found)

Many hub bolts are Class 10.5 or harder. Standard bolts will fit but can fail w/o warning if they don't strip when installed.
I don't have 88 data and 22P doesn't say, not even just size for this.

88 Fiero FSM Torque spec...
Three bolts attaching hub and bearing assembly. Torque to 260 N-m (220 lb. ft.) on 3C-5
bolt, hub to knuckle is 220ftlb on 3C-10
If that's right info... so I'm guess is 10.5 or harder.
Much tighter then rear hubs only get Tighten to three hub and bearing bolts to 85 N.m (62 lb. ft.)
Both specs are clean dry threads.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

The 88 front hubs are held on with three M12x1.75 bolts with large torx head (I think the same size as the brake caliper).

Thanks for the info....I'll go try and get 'em....I have that Torx-55....So I ready!

Sorry, Assuming nothing hitting the hub... or rotor/wheel if on the car... Won't spin = bad.
Rotor can drag from pads or dirt shield so you need to check if the rotors are on.

GM and most other hubs are not "pre loaded" in the bearings same as Fiero and other wheel bearings as covered in my Cave, Front Bearings.

IOW should spin fairly easily w/o binding at any spot. And w/ the wheel on, the wheel should have a bit play because bearing setup.

There should be a slight resistance to spinning them as you move the grease around and the drag from the seal. The spinning motion should be slippery smooth.

If they spin freely, the grease is dried out and not doing anything. If there is any roughness, binding, or looseness, they are bad.

quote Originally posted by fieroguru: There should be a slight resistance to spinning them as you move the grease around and the drag from the seal. The spinning motion should be slippery smooth. If they spin freely, the grease is dried out and not doing anything. If there is any roughness, binding, or looseness, they are bad.

Perfect explaination...

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

[This message has been edited by fierogt28 (edited 01-30-2019).]