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yes some trans are electronic, this could give you a problem with your computer or harness in the truck do your research .You can get elec. or none elec. I have a 4l60e there are two elec. or no elec. as far as the rear end your good to go.

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Q: Can you put an overdrive transmission in a 1981 Chevy truck that has a 3 speed automatic in it now Do you have to change rear end?
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