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trans line pressure mod
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  1. Allison OEM
    Hi Guys, 2015 GMC 2500 Duramax w/Allison I spoke to my tuner and he had suggested to replace the stock Transmission solenoid with a new solenoid #29541895 to increase line pressure before he does transmission tuning. Has anybody done this and opinions? Also does anybody sell a kit to do...
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