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High tranny fluid temps while towing with 2025 SX Prestige X-Pro?

Steve T

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Location
Colorado
#1
1st time poster here.:) I hoped to use our new X-Pro (with towing package for a 5500# tow rating with weight distributing hitch) to tow our 4560# loaded travel trailer on occasional trips. (We also plan to get a 1/2 4WD PU as main TV.) Yesterday I headed out for a test drive before leaving for southern AZ😎 next Thursday.

The good news? Telly had "adequate" power, decent braking with the Prodigy P3 brake controller I installed and little sway with the WDH.πŸ‘ The not-so-good news? It came from the Scan Gauge II I installed to keep an eye on the transmission fluid temperature.(TFT)

I chose a sustained 8 mile highway climb with a 700' elevation climb in Towing Mode. (On the flats at 60 MPH TFT was 190-200) However, as I climbed the moderate grade (sorry, don't have an exact %) TFTs rapidly climbed so I quickly slowed down first to 40 MPH and then 30 MPH. (Not making a lot of friends behind me!):mad:

At 30 MPH TFT stabilized at 224. (I'm not a mechanic but Google consistently tells me "bad things" start to happen over 220!)
I then timidly pushed the limit and drove slowly (more 30 MPH creeping) 10 miles with a 1300' elevation gain and the TFT rose to 226. (Radiator temp on the Scan Gauge read 216.)

So folks, is there something I could have done better here?:unsure: Questions for the group:

1. Any work arounds? Is there a better way I should drive hills? (I let tow mode choose the gear.)

2. I know the X-Pro has an internal transmission cooler but an obvious fix would be an external auxiliary tranny cooler? Has anyone done this and if so, can you share a link?

3. With adding an auxiliary cooler I obviously don't want to affect the factory warranty. Thoughts on warranty coverage? (I'll check with dealer too.)

I find it surprising that Kia could rate the X-Pro at 5500# (with WDH) and yet these TFT's could so quickly rise with moderate climbing.😯 However, on all other areas we love our Telly!πŸ’– Many, MANY thanks in advance!

Steve
 
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Steve T

New Member
Messages
3
Likes
0
Location
Colorado
Thread Starter #4
Welcome to the site.
I would like to hear what your dealership has to say.
What do they consider high temp when towing ??
.
Thanks for the reply. Right after we get back from our AZ camping trip (with our Ram 3500 doing the honors instead of the Telly):cry: I plan to visit the dealer!
 


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