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91-92 Trans Am Spoiler - Mounting

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Old 11-12-2012, 11:48 AM
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91-92 Trans Am Spoiler - Mounting

I recenlty purchased the correct Spoiler for my 91 bird including the metal framing for the hatch glass, I was hoping it mounted in the same holes as the pedestal spoiler I am replacing... needless to say it doesn't. To save me a little lining up and such anybody out there have the measurements off the deck lid for the mounting holes by chance???

Thank you!
Old 11-12-2012, 08:41 PM
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Re: 91-92 Trans Am Spoiler - Mounting

if you can wait till wed i can send you the diagram from the service manual. i think it has measurements too but im not sure. im not near it right now.
Old 11-13-2012, 07:25 AM
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Re: 91-92 Trans Am Spoiler - Mounting

I have one out back, I'll get some measurements when in stops raining.
Old 11-13-2012, 03:10 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Thank you no rush! I didn't even think about looking there, I have a manual. I will also await your response.
Old 11-13-2012, 03:11 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Thanks I am no rush so waiting till it stops raining is fine by me!
Old 11-17-2012, 12:35 PM
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Re: 91-92 Trans Am Spoiler - Mounting

heres a pic of a 91 hatch panel from a formula w/ whale tail wing. i dont have a reg wing 91-92 panel to compare, they seem to be different from earlier panels.
i think you can use the shape of the panel to reference the locations, but ill try and get some exact measurements later.
Attached Thumbnails 91-92 Trans Am Spoiler - Mounting-hatchpanels-007.jpg   91-92 Trans Am Spoiler - Mounting-hatchpanels-011.jpg   91-92 Trans Am Spoiler - Mounting-hatchpanels-008.jpg  
Old 11-18-2012, 05:55 PM
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Re: 91-92 Trans Am Spoiler - Mounting

GMs manual doesnt have measurements. terribly sorry
Old 11-19-2012, 03:00 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Are you talking about this type of spoiler?


I have this 91 TA with the spoiler off it right now.

If this is the spoiler your'e looking to mount I can get you pics and measurements. I'm not sure what you're looking for - are you looking for the measurements for where the holes in the deck lid are for this particular style spoiler, or for a different style spoiler?

Last edited by fyrebird68; 11-20-2012 at 07:53 AM.
Old 11-21-2012, 05:10 PM
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Re: 91-92 Trans Am Spoiler - Mounting

yep exactly what I am mounting, hoping to get soe good measurements take out the guess work
Old 11-21-2012, 05:11 PM
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Re: 91-92 Trans Am Spoiler - Mounting

yes looking for the holes as where I need to drill mine. I had the pedestal style on there mounting holes are different, Thanks!!!!!
Old 11-21-2012, 05:16 PM
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Re: 91-92 Trans Am Spoiler - Mounting

yes perfect! If you can get the measurements that would be great! Keep the guess work down for me
Old 11-21-2012, 05:18 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Originally Posted by stealtht/a
heres a pic of a 91 hatch panel from a formula w/ whale tail wing. i dont have a reg wing 91-92 panel to compare, they seem to be different from earlier panels.
i think you can use the shape of the panel to reference the locations, but ill try and get some exact measurements later.

yes perfect!

If you can get the measurements that would be great! Keep the guess work down for me
Old 11-21-2012, 05:18 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Originally Posted by fyrebird68
Are you talking about this type of spoiler?


I have this 91 TA with the spoiler off it right now.

If this is the spoiler your'e looking to mount I can get you pics and measurements. I'm not sure what you're looking for - are you looking for the measurements for where the holes in the deck lid are for this particular style spoiler, or for a different style spoiler?
yes that is the exact spoiler I am mounting. Thanks!
Old 11-21-2012, 06:09 PM
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Re: 91-92 Trans Am Spoiler - Mounting

I,ll get them tonight
Old 11-21-2012, 09:14 PM
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Re: 91-92 Trans Am Spoiler - Mounting

I got some some measurements. See pics for location of these dims. All measurements are center-to-center.

Deck holes are .50"
----------------------------
Deck lid. This is the original deck lid for this TA. Has not been repaired or redrilled.

Driver side:
A - 3.5"
B - 7.1875"
C - 6.75"
D - 5.125"

Pass. side:
A - 3.1875"
B - 6.875"
C - 6.875"
D - 5.1875"

E - Distance between forward holes: - 48”
F - Distance between rearward holes: 40.25”

-----------------
Spoiler. This is a GM spoiler, not from this car. Has not been altered. (Remember you are looking at the spoiler upside down – the driver side is on the RIGHT)

Pass side:
G – 3.8125”
H – 2.0”
J – 1.0”
K – 5.0”

Driver Side:
G – 3.75”
H – 2.0”
J – 1.0”
K – 5.0”

L - Distance between forward holes: - 48”
M - Distance between rearward holes: 40.125”

Notice that based on the deck hole dimensions the spoiler appears NOT to be centered on the deck.
---------------------------
Two lessons here:
1. The spoiler, being a molded part, had much better controls on manufacture than holes drilled in the deck at assembly.
2. It was not an exact science how these holes were drilled. The assembler probably slapped a template on the deck and drilled. A combination of slop in the template (wear, inaccuracy) and inattentiveness by the assembler gave some variation. Saving grace is that the spoiler bolts are 1/4 “ and the holes are ½”, giving room to adjust the spoiler.

Hope this helps. Be glad to look in detail if you need more info. (Please don’t laugh at my feet in the pic!)
Attached Thumbnails 91-92 Trans Am Spoiler - Mounting-hole-dims-deck.jpg   91-92 Trans Am Spoiler - Mounting-hole-distances-deck.jpg   91-92 Trans Am Spoiler - Mounting-spoiler-dims.jpg  
Old 11-22-2012, 07:10 AM
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Re: 91-92 Trans Am Spoiler - Mounting

To the OP
What does your hatch panel look like?
If its the same as the red one, I would forget the measurements and just use the panel cut outs as the guide.
Old 11-24-2012, 07:03 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Originally Posted by fyrebird68
I got some some measurements. See pics for location of these dims. All measurements are center-to-center.

Deck holes are .50"
----------------------------
Deck lid. This is the original deck lid for this TA. Has not been repaired or redrilled.

Driver side:
A - 3.5"
B - 7.1875"
C - 6.75"
D - 5.125"

Pass. side:
A - 3.1875"
B - 6.875"
C - 6.875"
D - 5.1875"

E - Distance between forward holes: - 48”
F - Distance between rearward holes: 40.25”

-----------------
Spoiler. This is a GM spoiler, not from this car. Has not been altered. (Remember you are looking at the spoiler upside down – the driver side is on the RIGHT)

Pass side:
G – 3.8125”
H – 2.0”
J – 1.0”
K – 5.0”

Driver Side:
G – 3.75”
H – 2.0”
J – 1.0”
K – 5.0”

L - Distance between forward holes: - 48”
M - Distance between rearward holes: 40.125”

Notice that based on the deck hole dimensions the spoiler appears NOT to be centered on the deck.
---------------------------
Two lessons here:
1. The spoiler, being a molded part, had much better controls on manufacture than holes drilled in the deck at assembly.
2. It was not an exact science how these holes were drilled. The assembler probably slapped a template on the deck and drilled. A combination of slop in the template (wear, inaccuracy) and inattentiveness by the assembler gave some variation. Saving grace is that the spoiler bolts are 1/4 “ and the holes are ½”, giving room to adjust the spoiler.

Hope this helps. Be glad to look in detail if you need more info. (Please don’t laugh at my feet in the pic!)
Awesome! I truly appreciate the info! Really helps take the guess work out!

Thanks everyone!

Scott
Old 12-04-2012, 12:10 PM
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Re: 91-92 Trans Am Spoiler - Mounting

Originally Posted by stealtht/a
To the OP
What does your hatch panel look like?
If its the same as the red one, I would forget the measurements and just use the panel cut outs as the guide.
I will look for those when I get to mounting it, thanks for the heads up! I didn't think there would be any since it came with the pedastal mounted spoiler. I looked but not hard and didn't see any but will tkae a peek! Thank you
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