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Towing with a Forester

97 messages,  Last post on Apr 21, 2008 at 6:24 AM

You are in the Subaru Forester Forum. Your Host is kcram

What is this discussion about? Subaru Forester, Towing, Wagon


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#56 of 97
Re: Forester to tow an RV trailer? [p0926] by xwesx
Dec 10, 2007 (1:45 pm)
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Replying to: p0926 (Dec 10, 2007 11:36 am)

c. When towing something almost as heavy as your Forester, be aware that the emergency handling will be severely compromised.
 
Be constantly aware on this point.
#57 of 97
Re: Forester to tow an RV trailer? [p0926] by aatherton
Dec 13, 2007 (6:44 am)
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Replying to: p0926 (Dec 10, 2007 11:36 am)

"a. You should have trailer brakes since it's over 1000 lbs
c. When towing something almost as heavy as your Forester, be aware that the emergency handling will be severely compromised."
 
The purpose of the trailer brakes is not only to help the car's brakes, but also to help emergency handling. For instance, without trailer brakes, applying the car's brakes causes the trailer to push on the ball, if the car is not going in a straight line, this push will force the rear end to the outside and begin a jacknife.
 
I noticed this only once and it scared me so I never let it happen again. One rainy day I was pulling our 2,000 boat with our Mazda pickup, and braked gently to round a tight turn on a little 2-lane road. Suddenly the braking made the trailer begin pushing the back of the truck around to the outside of the turn. To stop this I had to release the brakes and coast, so the trailer would follow the truck instead of pushing it to the side. That meant taking the turn a lot faster than was safe, out of control.
 
If the trailer had had brakes, the trailer brakes would have made the trailer pull on the hitch, instead of push on it. So the trailer would not have tried to keep going straight and push the back of the truck around.
#58 of 97
Re: Forester to tow an RV trailer? [p0926] by aatherton
Dec 13, 2007 (6:48 am)
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Replying to: p0926 (Dec 10, 2007 11:36 am)

"b. If towing beyond short distances, a transmission cooler would be extremely helpful."
What does extremely helpful mean?
The Forester is rated at 2400 lbs and the manual does not say a transmission cooler is part of that rating, like it says about trailer brakes.
#59 of 97
Re: Forester to tow an RV trailer? [aatherton] by rsholland
Dec 13, 2007 (6:58 am)
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Replying to: aatherton (Dec 13, 2007 6:44 am)

What kind of trailer brakes were they? Surge brakes, or electric brakes?
 
With electric brakes you can control the amount of braking needed with an interior-mounted electronic brake control, not so with surge brakes. Surge brakes are really not very good.
 
Bob
#60 of 97
Re: Forester to tow an RV trailer? [aatherton] by p0926
Dec 13, 2007 (8:22 am)
Reply

Replying to: aatherton (Dec 13, 2007 6:48 am)

The purpose of the trailer brakes is not only to help the car's brakes, but also to help emergency handling.
 
And they do indeed "help" but you still have to be aware that you're towing a trailer and modify your driving accordingly.
 
What does extremely helpful mean?
 
He has a previous generation Forester that is only rated to tow 2000 lbs so if he's gonig to be towing a significant distance then I think a transmission cooler would be a good idea.
 
-Frank
#61 of 97
Re: Forester to tow an RV trailer? [rsholland] by paisan
Dec 13, 2007 (3:27 pm)
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Replying to: rsholland (Dec 13, 2007 6:58 am)

I would add that using a controller that has an inersial(sp?) controller on electric brakes makes a big difference. Some of the cheaper controllers apply the brakes based on the brake-light circuit (the longer you are on the brakes, the longer it applies them, no matter how hard or softly you hit the brakes)
 
On surge brakes, it depends on the application. I tow a 10,500lb triple axle boat trailer with my Armada and it has surge brakes w/discs on it and it does pretty well with the surge brakes. There are 2 reasons to get surge brakes on a trailer, mostly if it's a boat trailer you would have surge brakes due to the electric brake components getting wrecked in the water, the other reason would be if you lend your trailer out to various friends who probably don't have controllers.
 
I would say though Electric over Hydrolic > Electric > Surge > No Brakes.
 
-mike
#62 of 97
Re: Forester to tow an RV trailer? [postymcgee] by aatherton
Dec 13, 2007 (5:00 pm)
Reply

Replying to: postymcgee (Dec 04, 2007 11:25 am)

"... Does having all-wheel drive make a difference?"
 
Only in terms of traction. Maybe not so important with an RV trailer. With our 2000 lb boat on a compact pickup truck, there were several ramps that I declined to use for lack of traction.
 
If the ramp was steep, and the water's edge was covered with mud or algae, then the tires would spin on pull out. If the boat was pulled partly out of the water, and the tires were spinning with no hold, the boat would try to return to the water, pulling the truck back with it. By the time the boat was buoyant again and stopped pulling, the rear of the truck could be pretty deep in the water. This spinning and loss of forward motion began to happen a couple of times, and so I just avoided such ramps.
 
With 4WD or the Forester's AWD in 50/50 mode, this would not happen.
#63 of 97
Re: Forester to tow an RV trailer? [xwesx] by xtop
Dec 13, 2007 (5:40 pm)
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Replying to: xwesx (Dec 10, 2007 1:45 pm)

I am constantly aware of the effect the trailer has on handling and braking. Thanks for your concern.
#64 of 97
Re: Forester to tow an RV trailer? [paisan] by xtop
Dec 13, 2007 (5:54 pm)
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Replying to: paisan (Dec 13, 2007 3:27 pm)

The trailer in question has mechanical surge brakes and they do work very well as we have found after two recent trips. The tow rating for the manual transmission Subaru is 2400 lbs. A transmission cooler for a manual transmission is rather difficult as some sort of pump must be added to circulate the lubricant through the cooler. Ordinary manual transmissions use splash lubrication and have no internal oil pumps. We have the turbocharged Subaru and probably the greatest problem we have found is that under heavy load the turbo cuts in and the mileage goes way down to 12-13. On a flat land trip, towing, with little or no wind it stays up around 16-17. We will accept this until we look into something with a bit more reserve power. The options are: drive the Subaru and get 24-27 on the highway when unladen, 12-17 when towing or trade up to something larger that gets 18-21 unladen and 15-16 when towing. Sounds like we will stay with Subaru. The new Forester will warrant a look when it comes out in a few years. I am told that it will grow in size a bit. We will see when it arrives. We do love our Forester XT.
#65 of 97
Re: Forester to tow an RV trailer? [xtop] by paisan
Dec 13, 2007 (6:04 pm)
Reply

Replying to: xtop (Dec 13, 2007 5:54 pm)

Yeah I think we were assuming it had an AT when we suggested a tranny cooler. I would upgrade to Synthetic gear lube in the trans and diffys.
 
The new forester is out will be arriving here in Feb IIRC. Larger but powerplants will likely stay similar.
 
-mike

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