3800 wiki

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<h2>Overview</h2>
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The 4t80e is the strongest 4 speed automatic transverse transmission option available. The 4t80e was common behind Northstar engines in front wheel drive cars so it has the same bellhousing as the 3800 and should be able to fit in most 3800 platforms.
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The 4t80e weighs 245 lbs with the converter compared to the 4t65e which weighs 195 lbs with the converter. Some have claimed that the 4t80e takes significantly more power to drive than the 4t65e as well.
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Though mechanically it will bolt up, the electronics are an area where a lot of people start to lose interest in the swap.
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<h2>Strength</h2>
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The 4t80e was rated for 305 ft-lbs of torque, though some have estimated that it may be strong enough to handle 600 ft-lbs in stock form.
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Use this information at your own risk, this may be incomplete or lacking in some areas
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<h3>Physical fitment</h3>
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The rear knock sensor on the 3800 will need to be removed to make room for the transmission<br/>

The rear lower bellhousing bolt will need to be grinded a little bit as well.
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Some of the bolt holes do not line up, and you will need to make a bracket to support the tailhousing
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The rear exhaust manifold seems to interfere with the transmission as well
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The flywheel will need to be drilled since the torque converter uses 4 bolts instead of 3. Spacers may also be a good idea.<br/>

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<h3>Electronics</h3>
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<h2>Resources</h2>
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<a href="https://www.gmforum.com/1992-1999-91/3800-swap-4t65-4t80-pt1-300890/" class="urlextern" title="https://www.gmforum.com/1992-1999-91/3800-swap-4t65-4t80-pt1-300890/" rel="ugc nofollow">https://www.gmforum.com/1992-1999-91/3800-swap-4t65-4t80-pt1-300890/</a>
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