I am not a mechanic so I do not claim to be an expert in this area but I have been towing camping trailers for 15 years. I have fried transmissions on two V-6 engines towing a pop-up that weighed loaded around 2000lbs (Jayco 1406). I was not towing in overdrive, was going a maximum of 65 MPH, and was not on any severe inclines (North Georgia and Shenandoah Valley). Each time I was towing in the heat of the summer. I have towed with my inline-6 (4.0 L) on my Jeep for the last 7 years towing the Jayco and now my 3326 Trailmanor and I have not had any transmission troubles. The only difference that I can contribute my better reliability with the transmission on the Jeep is that I installed a transmission cooler. In my opinion a transmission cooler is cheap insurance to reduce problems with an automatic transmission.
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