Quote:
Originally Posted by xjohnx
I thought it was a valid question. If it's the transient spark tables, why would it happen during tuning? I haven't seen any dyno tuning methods where you'd be on-off-on the throttle in a similar manner that is described in the TSB or used to induce oversteer.
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If detonation is what is killing the seals, that can happen during tuning, during a wot pull on the interstate, pulling away from a long traffic light etc etc it is not something that only happens as a result of the conditions in the tsb.
Certainly, the omission of transient retard beyond 5,000 rpm will cause most cars to experience shift knock at some time or another... but that is not the only time knock can occur.
IMO, the seals are simply a poor design and will continue to fail even after the update for some un lucky folks with knockzillas under the hood. That's not to say that fixing the transient retard issue is not valuable, it certainly is, and both subaru and toyota should do a recall / all regions tsb on the issue at a minimum.