yjf1535

I have a 2008 Uplander. I have recently started pulling a camper that when loaded weighs right at 3,500 Lbs. This is the maximum the Uplander can pull. I have added a transmission cooler, Air shocks and a weight distributing hitch. The engine really works hard in this hilly part of the country (Southwest Missouri). The Uplander came standard with a small oil cooler - it is basically just a metal tube that runs below the radiator. Do I need to add an engine oil cooler? I would appreciate any input. Thank you,

tech2

the tube cooler you speak of...isn't it for the power steering?

yjf1535

It may be I will have to look at it again tomorrow.

yjf1535

Tech2 is correct, it is a power steering cooler. I feel like such a dork, but I'm glad I asked the question because I have learned something. I would still appreciate anyone's thought on rather or not an oil cooler is needed. Thank you.

tech2

I think your ok without it. towing puts more heat into the trans fluid than engine oil. Pretty sure my 2500 pickup doesnt run an engine oil cooler. Since you are towing...this is severe service so follow the service service maintenance interval. Every 3 to 4 thousand miles do a oil change.

yjf1535

tech2,
Thanks for your input. The transmission cooler is a Hayden 678. It says it is good for pulling a trailer up to 5,000 Lbs. It is basically a radiator without a fan. Before my next camping trip I plan to add a second transmission cooler with a temperature controlled fan. It will go through the passive cooler first then through the cooler with the fan. If the temperature switch (Located between the two coolers) senses the fluid is 180 degrees or above the fan will come on and stay on until the fluid temperature reaches 160 degrees.

tech2

yes its nice to keep the trans fluid cool and extend the life of the fluid. Remember, just because the fluid is cooler doesn't mean all the stress on the trans is gone. keep within the tow capacity. Cooling fans are nice at slow speeds but they are basically ineffective at highway speeds.

Papa Bear

I would think the transmission fluid should be changed more often as well under this severe towing condition. Do you think so too, tech2?

tech2

yes. trans fluid interval is much shorter in the severe service maintenance schedule.

yjf1535

I had the transmission fluid flushed at 50,000 miles and I drained the pan and changed the filter around 100,00 miles. It now has 125,000 miles on it. I planned on changing the filter again at 150,000 miles, but I will check the owners manual and see what they recommend for severe service.