What size socket does the axle nut on a 99 GTP take? As near as I can tell using my plastic metric rule it looks like 35mm is this correct? thanks for the help

I think its a 35mm, its bigger than the fiero 30.

I feel dumb, I have the socket in the garage and have used it many times.

The 22mm axles use a 30mm nut ~ Like the Fiero
The 24mm axles use a 32mm nut ~ Like the Minivans and I think the G6
The 27mm axles use a 34mm nut ~ Like the Grand Prix GTP


EDIT: Corrected Grand Prix size.

[This message has been edited by Oreif (edited 04-08-2008).]

Thanks for the help guys

Went to the local Autozone yesterday to get a socket, they were out of 35mm but the friendly behind the counter guy didn't think 35 was right. He got a replacement axle off the shelf and he was right 34mm socket fit the replacement. Sooo i got home and guess what the 34 was too small, 35mm is the one!

quote Originally posted by Oreif: The 22mm axles use a 30mm nut ~ Like the Fiero The 24mm axles use a 32mm nut ~ Like the Minivans and I think the G6 The 27mm axles use a 35mm nut ~ Like the Grand Prix GTP

The large pattern A-body axle nuts are 36 mm.

I have a 36 and a 34... one of my axles are aftermarket, but I don't recall which one.

I suggest buying both sockets, then return the unused one.

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Thinking about dropping the L67 from my gp into a Fiero.
12.466 @ 114.15 INTENSE S1X/ZZP IC/TOG Headers

quote Originally posted by Will: The large pattern A-body axle nuts are 36 mm.

A-Body are these:

1982-1990 Chevrolet Celebrity
1982-1991 Pontiac 6000
1982-1988 Buick Century
1982-1988 Oldsmobile Cutlass Ciera
1984-1988 Oldsmobile Cutlass Cruiser (station wagon)
1989-1996 Buick Century
1989-1995 Oldsmobile Cutlass Ciera
1989-1995 Oldsmobile Cutlass Cruiser (station wagon)
1996 Oldsmobile Ciera (final year of the Cutlass Ciera and Cutlass Cruiser, sold without the "Cutlass" name)
1990-1996 Chevrolet Lumina APV
1990-1996 Pontiac Trans Sport
1990-1996 Oldsmobile Silhouette

Right?

The Grand Prix's are W-body cars right?

[This message has been edited by Oreif (edited 04-08-2008).]

Yeah, those are A-bodies. The minivans technically are something else, but they have the same front suspension. They even have the same rear suspension, just with different wheelbase, etc.

Yeah, GP's are W-bodies.

quote Originally posted by Will: Yeah, those are A-bodies. The minivans technically are something else, but they have the same front suspension. They even have the same rear suspension, just with different wheelbase, etc. Yeah, GP's are W-bodies.

The minivans are U-body platforms but use the 32mm axle nuts. Well at least my 2002 AWD Montana does. I had to change both front bearings last spring.

[This message has been edited by Oreif (edited 04-09-2008).]

Yeah, the U-bodies
I didn't think the U-bodies continued with the A-body suspension hardware that long. The last A-body car built was the '95 or '96 Buick Century.

quote Originally posted by Will: Yeah, the U-bodies I didn't think the U-bodies continued with the A-body suspension hardware that long. The last A-body car built was the '95 or '96 Buick Century.

1998 is when they changed everything. They dumped the plastic body panels and went to the metal body. They also got rid of the 3800 and moved to the 3400 for the engine.
My guess would be that 1997 is the last year of the A-body suspension usage.

This is off topic, but there are cradle braces in the U-body cradles which improve handling on A-bodies. They were originally developed and installed by the factory in X-11 Citations.

[This message has been edited by Will (edited 04-10-2008).]