Pontiac Grand Prix Forums : Grandprix

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Conversation Between Trannyman95 and grandprix5

2 Visitor Messages

  1. Hello trannyman quick question I have a 2005 grand prix and im going from 3.05 gears to 2.93 ...besides the speedometer is there anything else that can get affected if its not tune for the new gears ? Can I use the car without the tune and tune it later ?
  2. Sorry my inbox was full
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