8 speed Trans cooler bypass upgrade. Anyone familiar with this? Rev tec....

[MRFREEZE57]

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Very nice. Installed caulks part yesterday. Simply amazing

This is for sure the way to go to reduce the transmission temp, tool me about 90min to install Caulk's part, that included dropping the front drive shaft. the highest temp have seen is 160 in traffic in the summer.
Many times the aftermarket has improved the OEM design, a good example for a Harley, are many aftermarket parts that are much better than the factory.
one of the best examples is the old Ford Flathead motors, was very time consuming to set valve clearance until an aftermarket came up with an adjustable tappet and made the task much easier.

 

[PaleFlyer]

Man it's too bad all the engineers at Ram and ZF can build the actual best automatic transmission in the world but then don't know how to regulate its temperature correctly it sure is a good thing that random people on forums exist to solve their complex engineering problems for them.

My 2018 with 117k miles of basically "never" towing (2x had an 8ft trailer across town with some furniture from a bedroom, and a couple times the bed actually carried WEIGHT, not just volume. AKA moving furniture, not just like some lumber to FIX a swingset), and WITH the PPE pan, I'm now often ******* 250F when it used to never leave 185 once it hit temp.

Plus, have you SEEN the transmission fluid? Pretty sure the oil I use to make dinner is thicker at room temp.

 

[kurek]

Plus, have you SEEN the transmission fluid? Pretty sure the oil I use to make dinner is thicker at room temp.

I always wondered why, if oil thickness = oil goodness, why stop at 30w or 40w? You can buy VG680 that'll stand up a fork for a few seconds at room temperature.. who decided 30w is the sweet spot for all applications of all lubricants in all machines for all time?

 

[PaleFlyer]

I always wondered why, if oil thickness = oil goodness, why stop at 30w or 40w? You can buy VG680 that'll stand up a fork for a few seconds at room temperature.. who decided 30w is the sweet spot for all applications of all lubricants in all machines for all time?

It's always trying to find the balance of thick enough to do the needful, but thin enough that it doesn't make it's own friction.

Problem is, we also are trying to find the best fuel economy, so we go even thinner.

My wife's Toyota RAV4 states in the manual it REQUIRES 0W16, we can use 0W20 ONCE in an emergency. Yet the exact same engine in ANY other market is rated to use 5W20...

 

[Randy Grant]

It's always trying to find the balance of thick enough to do the needful, but thin enough that it doesn't make it's own friction.

Problem is, we also are trying to find the best fuel economy, so we go even thinner.

My wife's Toyota RAV4 states in the manual it REQUIRES 0W16, we can use 0W20 ONCE in an emergency. Yet the exact same engine in ANY other market is rated to use 5W20...

HHmmmmm. I wonder if the gov'ment got involved. Didn't know Fauci worked as DOT/DEQ consultant too.

 

[kurek]

I always hate when I get good fuel economy

 

[PaleFlyer]

I always hate when I get good fuel economy

Look at the recent GM recall.

They are having to change back to 0W40 from 0W20, as it was causing BRAND NEW engines to grenade. Like before they even make it off the lot.

There is a point when the oil is just too damn thin, that the small economy saving is lost to having to replace the engine every 6 months.

 

[Joes1500]

I just did the caulk kit a few weeks ago. I'm in Texas and my before transmission temps were always 190-200. Since installing I haven't seen over 165, even when it was 107 in Carlsbad yesterday.

Definitely works and is super easy to install