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Pulled a couple codes this evening. Had the normal KAM and injector pressure high/low. Had never seen this code pop up before--PO733 Gear 3 Ratio Error. What is this one? Not too worried, been driving/shifting like normal. Thinking also about making a call to BTS to see if Brian may know what it is.
If it's shifting ok, I probably wouldn't worry about it. With aftermarket tuning, and an aftermarket transmission, you're bound to get weird codes that pop up randomly.
Incorrect gear ratios can be caused by, wrong tach info, bad input turbin sensor" top of trans left side," or trans slipping. Before condeming the trans, the codes should be cleared and vehicle driven again while watching these inputs on a scanner. If they ck out ok, then you can assume the trans is slipping. Not good news.