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1989 Trans am GTA Restoration Thread

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Old 02-05-2024, 07:59 AM
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Car: '90 Formula '88 GTA
Engine: 305 TPI 350 TPI
Transmission: T5 700R4
Axle/Gears: 3.42 10 Bolt 3.27 9 bolt
Re: 1989 Trans am GTA Restoration Thread

looking great!! keep up the good work
Old 02-05-2024, 03:23 PM
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Re: 1989 Trans am GTA Restoration Thread

Now that is what I call an UPDATE! Keep up the great work.

Fred
Old 02-05-2024, 07:44 PM
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Car: 1988 Trans Am
Engine: L03
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Re: 1989 Trans am GTA Restoration Thread

All nice looking, quality work.
Old 02-05-2024, 07:55 PM
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Car: '89 GTA
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Axle/Gears: Borg Warner 3.70:1
Re: 1989 Trans am GTA Restoration Thread

Thanks all for the words of encouragement. Trying to get a bunch of work done over the next couple of months and will update again.
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Old 03-17-2024, 08:26 PM
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Re: 1989 Trans am GTA Restoration Thread

February 2024: Brake install

Front brakes are Baer 12” w/PBR calipers based on the 1LE. Rears are the stock PBR calipers, rebuilt. Calipers were disassembled, powder coated and reassembled. Baer pads and Baer rotors front and rear, braided stainless flexible brake lines and new hard steel lines. Also new park brake cables.











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Old 03-17-2024, 08:38 PM
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Re: 1989 Trans am GTA Restoration Thread

March 2024: Transmission Install

The T56 went in without too much trouble. Cut the hole for the shifter and added rivnut threaded inserts for the lower shift boot because I didn’t like the idea of sheet metal screws. Hawks T56 conversion crossmember, had to trim it a little because it interfered with the Alston subframe connectors. I got the one with the driveshaft loop, but I’m thinking it may interfere with the exhaust. Will find out when I get there and if I have to cut the loop off, so be it.







Old 03-17-2024, 08:47 PM
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Re: 1989 Trans am GTA Restoration Thread

March 2023: Install headers

The headers are a tight fit, so I waited to install them until the transmission was installed and the engine/trans were in their correct position in the car. Dyno Don headers with AIR tubes. The quality of these headers are exceptional and they fit perfectly. Sure is easier to install these with an empty engine bay.





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Old 03-18-2024, 01:57 PM
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Car: 1988 Trans Am
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Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: 1989 Trans am GTA Restoration Thread

Where did you get the blue boots for your Koni struts on the front?
Old 03-18-2024, 02:20 PM
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Car: '90 Formula '88 GTA
Engine: 305 TPI 350 TPI
Transmission: T5 700R4
Axle/Gears: 3.42 10 Bolt 3.27 9 bolt
Re: 1989 Trans am GTA Restoration Thread

Originally Posted by DynoDave43
Where did you get the blue boots for your Koni struts on the front?
Those appear to be Bilstein's hence the blue boot... although I am curious which model, since I did not think Bilstein made a front strut for thirdgens.

Immaculate work! hope your exhaust fits OK!
Old 03-18-2024, 02:34 PM
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Re: 1989 Trans am GTA Restoration Thread

Originally Posted by ughmas
Those appear to be Bilstein's hence the blue boot... although I am curious which model, since I did not think Bilstein made a front strut for thirdgens.

Immaculate work! hope your exhaust fits OK!
Yes, they are Bilsteins purchased 20 years ago and they are no longer made. They were on the car for about 5,000 miles before I took the car off the road. They are in very good shape, but are old. They don't leak now, but we'll find out how they hold up when I start driving it again. If they leak, I'll send them back to Bilstein to be rebuilt.
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