Not with the "upgrade" kits. Its a very good transmission. I had mine upgraded from an LT1 t-56 to an LS1 t-56 and put in the kit similar to a "magnum". Cost about 650 in labor to have rebuilt plus parts. I had a company who builds race car transmissions do it, it totaled 1700, but that included a $280 input shaft most people dont need.
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Mike
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