Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Will changing fluid cause slippage?
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Old 12-03-2011, 10:47 AM
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Thanks for all the replies. The reason I asked was my son's Allison 1000 tranny in his duramax was slipping and putting the truck in limp mode. I was going to change the fluid but instead just changed the screw on filter, topped off the fluid and it still slips in 4th & 5th gear. It pulls good in 1st thru 3rd but then slips bad when it shifts to 4th. I think we are just going to buy a Suncoast tranny that can handle the increased HP since he installed a chip.
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