What is this?

[Planerdude]

Can anyone identify this part on the drivers side of the 850 RE transmission?

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[jac04]

 

[Planerdude]

What does the canister do?

 

[jac04]

I don't know for sure. It could be a strainer/filter of some type based on the location.

 

[sharpsicle]

Expansion chamber or separator or strainer or something similar.

Why do you ask? Are you trying to remove it or something?

 

[Planerdude]

Expansion chamber or separator or strainer or something similar.

Why do you ask? Are you trying to remove it or something?

Ive been trying to determine the flow direction, of the atf, in and out of the heat exchanger/ thermostat device. And is there way to bypass or get rid of it.

 

[sharpsicle]

I suppose you could remove it, but I would bet that's there on purpose, possibly to help mitigate against aeration. Is there a problem it's creating by being there?

 

[Ramcharger1990]

All my old Mopars I've removed the thermostat and bypass them. cuz it's a failure point of their Transmissions, the bypass gets stuck shut and does not run the fluid to the cooler, but this new style I don't know how or if there's a bypass for them

 

[Uparms]

What the hecks your tranny doing out of your Jeep??

 

[Planerdude]

What the hecks your tranny doing out of your Jeep??

??not mine. Just a reference pic.

 

[ShadowsPapa]

All my old Mopars I've removed the thermostat and bypass them. cuz it's a failure point of their Transmissions, the bypass gets stuck shut and does not run the fluid to the cooler, but this new style I don't know how or if there's a bypass for them

This isn't an old MOPAR. Likely this is far more reliable than anything you are used to.

Solution looking for a problem...............

 

[Ramcharger1990]

I'm talk one failed on my 2016 longhorn and on 08 megacab. They started to put them on to get fluid up to temperature for fuel efficiency. At least what I was told.

 

[ShadowsPapa]

I can think of multiple reasons, oddly, mpg isn't near the top of my list because the CAFE testing doesn't lean hard on cold performance. It would be a gnat's hair in the grand scheme of things.
To me, I'd want to warm up the seals and the fluid to function more smoothly during shifting, cold fluid can mush up shifts, slow things down, meaning more clutch slippage. Cold seals are more prone to damage and leaking internally (and externally for that matter)
Because people today are more demanding of smooth, consistent shifts, quiet operation, no noises and so on, to allow the fluid to flow through a cooler in 0 degree weather is going to keep the fluid cold and the viscosity higher as well as allowing the seals to have to operate cold for much longer. Plus - like the engine, people commute short distances meaning the transmission never gets warm enough to remove moisture that's naturally in the air and the fluid dies sooner.
For me, I'd want it warmed up and controlled for the life of the fluid and seals and consistent shifting.

 

[Planerdude]

Was just looking for the purpose of the small canister on the fluid line. Im not trying to create a problem, but trying to understand how this whole heat exchanger unit and how it functions.

 

[ShadowsPapa]

Was just looking for the purpose of the small canister on the fluid line. Im not trying to create a problem, but trying to understand how this whole heat exchanger unit and how it functions.

You are looking for a tech who knows transmissions, or someone with access to engineering documents or other details.
Doubt 99.9% of even DIY people know or care. Most leave those parts alone since they just don't cause issues.
Good luck.

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