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Old Thu, December 30th, 2010, 10:53 PM
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Quote:
Originally Posted by Towinearly99 View Post
I was told that because of the quicker shifts that the stock shift/torque conveter lockup strategy is to slow now causing the slight flare in rpms. Or is this just bull crap?
I'll let Bill in on this one, but everything we do in the tuning for a stock transmission is geared towards making everything happen "quicker". To say that everything is happening too slow makes no sense to me. The normal practice for compensating for a shift kit or valve body "upgrade" (loosely using that term) that is installed after tuning for a stock transmission has taken place is to set all shift pressure modifications back to stock to actually "slow" everything down and soften the shifts a bit.

The only thing that I can see happening here is a supply issue of fluid from the pump or a loss of flow through the passages/feed holes during a shift.

Run it without the chip and see what happens. My guess is that the "slow" factory shifts will likely REALLY make the transmission unhappy.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.