While reading the threads on some transmission issues I keep seeing "extended soak" what does that mean?

Thanks,

 

Generally heat soak is a condition where you bring an engine or trans up to or beyond normal operation temperatures then shut it off and let it soak in that heat. This "soak" period is without the normal cooling systems operating associated with the component operating. So its kind of overheating in a way but its not running causing wear part damage, per se. This kind of trouble shooting is generally employed to find bad electrical components in a trans, engine or a variety of other electrical components...automotive and non. Heat soak is also a problem with fuel systems especially old school carbureted systems where the heat soak will boil the gas out of the system causing vapor-lock, no-starts, hard starts etc due to vaporized gas.
Hot and Cold soak methods are used in engineering for durability and accelerated testing. They are used in the service industry to trouble shoot and diagnose problems.
Never heard of "extended" heat soak. Heat soak is heat soak, basically how ever long it takes to get back to normal or ambient from the elevated temp induced by switching off the systems cooling system. Maybe the posts you read were referring to running it up to op temps for extended periods to find a problem? Thats common but its not really a soak. If you were going to "extend" a soak then it would be in a controlled environment. Such as putting a trans or engine in an enviro chamber and "cooking" it to see where its limits are.

 

Yeah, we would need more context to know what was intended. If the context was regarding temperature, it could be cold soak (sitting in freezing temps overnight or a week), or heat soak (possibly just running at heavy load for hours, as when towing).

The point is, all parts of the tranny thoroughly reaching the extremes of temperature, which takes a lot longer than what the fluid gauge indicates.

On the other hand, the context might not have been temperature related at all (but it usually is). If it was regarding a leak for example, it might have referenced actually soaking filled with fluid.

 

Here is something I was reading in the TSB's and Recalls page

TSB 11-7-10

07/07/11

6.7L WITH 6R140 TRANSMISSION - 2-3 SHIFT FLARE
AND/OR MIL ON WITH DTC P0733 AND/OR DELAYED
REVERSE ENGAGEMENT - BUILT ON OR BEFORE
4/11/2011

FORD:
2011 F-Super Duty

ISSUE
Some 2011 F-Super Duty vehicles equipped with 6.7L engines and 6R140 transmission may exhibit a 2-3 shift flare and/or malfunction indicator light (MIL) on with diagnostic trouble code (DTC) P0733 and/or delayed reverse engagement, with a build date on or before 4/11/2011. Symptoms may be more evident or seem worse after an extended soak.

It sounds like the delayed reverse I'm expericing on my F350 with a build date of 2-11.

 

It's when you turn into a prune from being in the hot tub too long.

Sounds like you could benefit from that TSB, alot of folks with the 6.7/6.2 (myself included) had that TSB done (obviously the 6.2 was a different number, but same trans...).