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Originally Posted by docsg
I have an 03' SR5 V8 (TRD package) and I have added the RoadMaster Active Suspension kit. My truck came with a distributor added tow package (Class III hitch and 4-pin connector) instead of the the OEM tow package which includes a transmission cooler. Mind does not have the transmission cooler. I am getting ready to pull my motorcycle trailer from Alabama to Kentucky for a rally next weekend. The trailer is a 5 x 10 (enclosed) Wells Cargo CycleWagon. It has a curb weight of 1120 lbs. and GVWR of 2200 lbs. The trailer is a little lower (6' 11" ground to top) than regular trailers and has a NoseCone front end. The bike I haul has an approximate weight of 650 lbs. My question is this? Since the combined weight of trailer, bike, and gear will be slightly less than 2000 lbs., will I be okay w/out the transmission cooler? I have asked several service managers at Toyota dealerships and they say "pull away" and enjoy. However, a mechanic friend of mine said I definitely need a transmission cooler even if I pull a 300 lb. open trailer. I can order an aftermarket unit but don't have time to get it installed and I pull the trailer so infrequently, I hate to spend several hundred $$ if I don't really need it. I know there are many members of TS who have knowledge in the area of towing and I would appreciate any advice. I would assume Toyota designed the Tundra to have some towing capacity w/out the optional tow package but I could be wrong--
Thanks in advance----
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Well, first of all, you actually do have a transmission cooler...it's the oil/water cooler in the bottom of the radiator. Whether that's enough to keep your ATF reasonably cool with your load is kinda "iffy"...if you were going to do this in cool weather and on strictly flat roads I'd definitely say no problem.
But you will be crossing quite a bit of hilly terrain if I remember northern Alabama correctly and you will certainly be likely to be encountering pretty hot (90 plus) weather. However, based on my experience with a 4000 lb low profile travel trailer in rolling terrain in 90 degree weather, I'd say that that as long as you keep your speeds
under 65 and tow with the OD
off so the torque converter stays locked and you're not generating a lot of engine or transmission heat, then you'll be OK. But if you start pushing the engine harder or causing the transmission to either downshift or even have TC unlock on the hills, then all bets are off.