Tow Report

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Joined
Jan 3, 2006
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Just thought I post the results of a recent trip towing my first Airstream.

To start off with the tow vehicle is a Japanese imported right hand drive 1990 Toyota Landcruiser HDJ-81 with the 4.2l 1HT-D turbo diesel engine producing approx 168HP at 3500rpm and 268ft-lbs at 1900rpm. Solid axles with final gearing of 4.10, full time four wheel drive, 33" tires with 2.5" OME lift. Not sure of vehicle weight but probably between 5000 and 6000#

The trailer is a 2005 Airstream 19' Bambi, single axle GVWR 4500#

Combined weight probably in the region of 10000#

For towing I've installed a tranny cooler, Jordan brake (electric) controller, weight distribution bars and a single anti sway bar.

The trip took us approximately 900km (600mi) thoughout S. Ontario. I ran in third gear (not OD), rpm's at speed were usually 2600-2800rpm, normally with OD they would be 2200rpm with EGT's of 600F at highway speed (100kph.)

Quick word on EGT's. From my reading a good "normal" reading is 600F, try to avoid going over 1000F too often and not for too long. At 1270F the tips of the turbine begin to glow.

The first leg was from London to Niagara Falls, ON, mostly 400 series highways running at approx 96kph (60mph). EGT's at this speed were around 900F for the most part with the occasional peak of 1250F. Distance was 175mi, terrain mostly downhill and smooth, fuel consumption was 16.8/14.1mpg (CAN/US)

Second leg was from Niagara Falls, ON to Bracebridge, ON again mostly 400 series highways but this time in pouring rain, terrain was uphill most of the way. This time I ran at 90kph (55mph), EGT's were again 900F but I was for the most part running 1000F and hitting 1250 much more often. Fuel consumption was 13.9/11.6mpg.

Final leg was from Bracebridge back to London, this time running back roads, hilly terrain but speeds around 80kph (50mph). EGT's were much better, usually around 700F with fuel consumption around 15.8/13.1 mpg. BTW on this section I went sailing past a new Forerunner towing a 3500# trailer up a hill....

Without a trailer on I usually get between 24 and 28mpg.

This was our first trip out with the trailer and I wasn't too sure how things would go. Overall I'd say we were quite pleased. truck performed great and no problems with handling or towing the trailer. As for the trailer, love it. Pic attached.

As for where we stayed.

In Niagara Falls it was Jellystone Park, lots of fun for our three year old (I enjoyed watching Yogi Bear cartoons again...) In Bracebridge we stayed at Santa's Villiage campground, was OK. Daughter had a great time there, which is what it's all about.

Thanks all.
as_tv.webp
 
Thank you for your report.
I have the same truck (stock) and have a couple of questions.
On your mileage, did you account for the larger tires that you are running?
You seem to be getting better mileage than I do without a load and I am wondering about it (20-24 mpg)?
Did you notice a power difference with those tires & what brand are you running?
Do you think the tranny cooler was a necessity for towing this weight?
What type of a towing system did you install?
Would you have felt comfortable towing a longer/heavier airstream?
 
Bilbo said:
Thank you for your report.
I have the same truck (stock) and have a couple of questions.
On your mileage, did you account for the larger tires that you are running?
You seem to be getting better mileage than I do without a load and I am wondering about it (20-24 mpg)?
Did you notice a power difference with those tires & what brand are you running?
Do you think the tranny cooler was a necessity for towing this weight?
What type of a towing system did you install?
Would you have felt comfortable towing a longer/heavier airstream?
Hi Bilbo.

Mileage was actual distance off GPS. Odo/speedo read 8% under.

Tires were on it when I bought the truck. Bridgestone Dueller RH-S I think, the ones that come on the H3 as an option. 285/75r16.

Tranny cooler necessary? Yes, cheap and easy insurance.

Towing is a 2 5/16 ball, weight distribution bars and one anti sway bar.

Could I tow longer/heavier? Yes and no. The newer AS are much heavier than the older ones. I feel power wise I'm at the limit.

BTW. Just got back from more camping, this time ran with OD on at 80kph. 20 mpg. Doddle.
 
Looks like a cool setup Gowyn :)

I'm curious as to why you'd tow with it in 3rd (unless its up hill of course) Having the tourqe converter locked up in 4th keeps the trans temps much much lower, Plus better economy.

What where the EGTs while towing in 4th?
 
SamB said:
Looks like a cool setup Gowyn :)

I'm curious as to why you'd tow with it in 3rd (unless its up hill of course) Having the tourqe converter locked up in 4th keeps the trans temps much much lower, Plus better economy.

What where the EGTs while towing in 4th?

was experimenting.

could someone explain to me what the torque converter/over drive do? Truck has 2,3, and D. Was assuming D was OD.

Without load EGT's at 100kph are 600F. With trailer 800-900F in 3. Overall tranny is normally 60F cooler in D with or without trailer over 3 gear.
 
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