I was told that the three point strut tower braces were breaking windshields on the 4th gen cars. Is anyone haveing trouble with the 3rd gens? Can I expect a big difference if I install one on my car?

 

Must be installing them wronng. The 3 pointer mounts to the firewall which should not flex(that much) under any cornering situation. What would break a windshield would be putting the strees in a location that flexes the windshield with a force greater than the "Normal" Stress maximum of the glass which would cause failer. This would have to be done by direct application of the force. The window will flex a little bit in the seals because they are rubber allowing a little flex before the force was directly applied to the windshield. There is a lot of variables going into this and I just don't see this being able to happen because the bar does not push against the window. If it was flexing the firewall enough to push the front of the windshield frame out of alignment so bad that it would cause the windshiel to crack due to deformation I would think other problems would occur before the windo would actually crack.
I have nevr heard of this happening and have never seen a 4th gen with a 3 point STB, but just because in myu mind I don't see it happening doesn't mean it won't.

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FOR SALE!!!!!!!!!!!!!!!
86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,MSD 6A, Hypertech Power Coil,MSD Wires, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, removal of A/C hardware and added a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace added.
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Asking $4200 with all extra Parts that are needed to fix most apearance flaws. ie Complete hatch and wing from a 91 GTA
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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

 

I agree.. I dont see how it could happen. Maybe some freak accident...IM not worried about it. The brace will help alot do it. The towers flex even at low speed you will not have to correct the steering as much. I have a three point Edelbrock on mine.

Ive put thousands of miles on it and havent had any problems.

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!