[BriPac]

If I'm not mistaken, it also has a transmission warmer (3-way coolant bypass valve). These transmissions could last much longer without the vehicle constantly trying to get it up to 190 as quick as possible.

It's more easily observed in winter. If you turn on the heat full blast, your transmission will stay much cooler, much longer as coolant is diverted from it to the heater core. Turn off the heat and you'll immediately see the temperature rise as the bypass valve shuts off the heater core circuit and diverts to the transmission.

These functions are not meant for longevity, but rather for efficiency (read: meeting government requirements).

Yep with the theory of being if you're in a super cold climate the fluid is too cold and you can get rough shifts and the transmission won't perform at its most optimal point until it's warm if not hot. I think it just warms it up quicker from an ice cold state but probably doesn't get hot enough to cause any concern

 

[SitKneelBend]

Yep with the theory of being if you're in a super cold climate the fluid is too cold and you can get rough shifts and the transmission won't perform at its most optimal point until it's warm if not hot. I think it just warms it up quicker from an ice cold state but probably doesn't get hot enough to cause any concern

I've read 160 is optimal for longevity and emissions but I don't know the veracity of that claim.

 

[PacificaMinivanFan]

Remember Pacifica has the 948TE not ZF9 transmission they are similar but different

??? Pacifica has ZF9. Caravan and Town & Country have 948TE.

If I'm not mistaken, it also has a transmission warmer (3-way coolant bypass valve). These transmissions could last much longer without the vehicle constantly trying to get it up to 190 as quick as possible.

Are you thinking of coolant temperature? What you describe is what I see for coolant, not transmission temp. As I mentioned, our transmission temperature stayed in the 160-175 range except when under heavy load.

 

[BriPac]

??? Pacifica has ZF9. Caravan and Town & Country have 948TE.

Are you thinking of coolant temperature? What you describe is what I see for coolant, not transmission temp. As I mentioned, our transmission temperature stayed in the 160-175 range except when under heavy load.

No you have it flipped Caravan and Town & Country have the 62TE, Pacifica has 948TE, ZF9 is the foreign spec

 

[BriPac]

??? Pacifica has ZF9. Caravan and Town & Country have 948TE.

Are you thinking of coolant temperature? What you describe is what I see for coolant, not transmission temp. As I mentioned, our transmission temperature stayed in the 160-175 range except when under heavy load.

??? Pacifica has ZF9. Caravan and Town & Country have 948TE.

Are you thinking of coolant temperature? What you describe is what I see for coolant, not transmission temp. As I mentioned, our transmission temperature stayed in the 160-175 range except when under heavy load.

The thermal bypass valve warms the transmission by preventing cold fluid flowing through the cooler. The valve keeps the transmission fluid circulating within the transmission, allowing it to reach its optimal operating temperature faster by absorbing heat from the engine and transmission components.