OFFROADSUBARUS.COM

Go Back   OFFROADSUBARUS.COM > Offroad and Touring Central > Trailers and Vans

Notices

Reply
Thread Tools Display Modes
  #1  
Unread 23rd April 2015, 12:00 PM
PauSum's Avatar
PauSum PauSum is offline
Forum Member
 
Join Date: Jul 2008
Location: Perth Australia
Year: 2005 and 2014
Model: Forester and Outback
Transmission: 5 speed manual and 7 speed CVT
Posts: 228
PauSum is on a distinguished road
Default Max speed when towing a trailer

The manual of my MY14 2.0D CVT Outback indicates the following:
"Never exceed 80 km/h (50 mph) or legal towing speed limit, whichever is lower."

We plan to tow a trailer to Tasmania and it will take us a very long time to get there if we drive 80 km/h max for the whole trip - although I do not intend to drive too fast such as over 100 km/h (I haven't checked the legal speed of this as yet).

Just wondering has any diesel outback owner ever towed (trailer) over 80 km/hr?

Thank for sharing of your experience on this.
Reply With Quote
  #2  
Unread 23rd April 2015, 07:06 PM
Kevin's Avatar
Kevin Kevin is offline
Administrator
 
Join Date: Jul 2008
Location: Sydney, Oz
Year: MY'03
Model: Forester
Transmission: A/T
Posts: 4,513
Kevin is on a distinguished road
Default

I've been on several trips where OBs and Fozs have towed fairly large camper trailers at legal highway speeds; I've never heard any complaints.
__________________
MY'03 Foz AT XS with centre lock-up
MY'10 Triton AT GLX-R 2.5 DiD
www.subaruclub.com.au
Reply With Quote
  #3  
Unread 23rd April 2015, 08:19 PM
Ratbag's Avatar
Ratbag Ratbag is offline
Administrator
 
Join Date: Jan 2012
Location: Bayside, Melbourne, Vic
Year: MY06, MY10
Model: Forester SG & SH
Transmission: 5MT/DR & 4EAT Sports
Posts: 6,225
Ratbag is on a distinguished road
Default

^ ditto.

I have towed my CT behind Roo2 at 100-110 kmh without the slightest problem.

Back when it was just a normal box trailer (7x4), I have towed it fully loaded at up to 130 kmh behind my 1.8L '93 Impreza many, many thousans of kms with no problems ...

And ditto behind my 1.4L Mitsubishi Colt, around 5-10,000 kms!
Reply With Quote
  #4  
Unread 23rd April 2015, 08:29 PM
Robbks's Avatar
Robbks Robbks is offline
Forum Member
 
Join Date: Jan 2014
Location: Hobart
Year: 2010
Model: Forester 2.0D Premium
Transmission: 6 MT
Posts: 384
Robbks is on a distinguished road
Default

I suspect it's an *** covering exercise by Subaru on the CVT,
towing generates a lot more heat in any box, and the CVT would be very particular.
I'd be investing in an external tranny cooler for any Auto/ CVT that does a lot of towing.

And also using any sport mode that may be available to control the shifts and hold it higher in the rpm.

I regularly tow my camper with my SH9 diesel, and it only ever sees top gear (6th) when running along the flat at 100 or light downhill
the engine itself is much happier to be kept cruising at 2000-2100 revs when pulling the weight.
Reply With Quote
  #5  
Unread 23rd April 2015, 08:34 PM
idw's Avatar
idw idw is offline
Forum Member
 
Join Date: Jun 2012
Location: out bush
Year: sf
Model: sf
Transmission: m
Posts: 1,061
idw is on a distinguished road
Default

Is it something to do with the cvt transmission the 5sp owners man for the same year says nothing about a towing limit?

Could put more strain on the cvt belt/coil and fluid.

Tow test run down by someone.

http://www.tradervs.com.au/tow-vehic...um-cvt-review/
Reply With Quote
  #6  
Unread 24th April 2015, 01:43 AM
nipper's Avatar
nipper nipper is offline
Forum Member
 
Join Date: Nov 2008
Location: Oceanside, New York, USA
Posts: 484
nipper is on a distinguished road
Default

The car itself can do it. Unfortunately here in the states we don't have this drive train package available so we have no experience with it. Maybe this combo the diesel is spinning the turbo constantly and it can overheat the pistons while towing a trailer?
Reply With Quote
  #7  
Unread 24th April 2015, 01:53 AM
Robbks's Avatar
Robbks Robbks is offline
Forum Member
 
Join Date: Jan 2014
Location: Hobart
Year: 2010
Model: Forester 2.0D Premium
Transmission: 6 MT
Posts: 384
Robbks is on a distinguished road
Default

being a Variable Geometry turbo aswell as a diesel it is making positive manifold pressure almost 100% of the time (except when the ECU closes the throttle butterfly to top-up the vacuum in the brake booster)
But given the inherent construction of a DIesel engine, they are designed for the extreme heat and pressure of diesel combustion.

One of the local Rally Teams even ran the 2010 Diesel Forester in a special "SUV Class"
only very limited modifications were allowable for that class of racing, wher it's running 30PSI of boost for long durations.

Reply With Quote
  #8  
Unread 24th April 2015, 07:32 AM
PauSum's Avatar
PauSum PauSum is offline
Forum Member
 
Join Date: Jul 2008
Location: Perth Australia
Year: 2005 and 2014
Model: Forester and Outback
Transmission: 5 speed manual and 7 speed CVT
Posts: 228
PauSum is on a distinguished road
Default

Thanks everyone. I suspect the speed limitation is related to the (CVT) cooling issue as this is also stated in the manual:

"Diesel engine models only:
The vehicle speed may decrease when climbing up a slope or during continuous high-load driving while towing a trailer. Therefore, please use extra caution when climbing up slopes while towing a trailer (for example, never attempt to pass vehicles while driving uphill, etc.). This control system is necessary for maintaining the ability of the vehicle cooling performance and does not indicate a malfunction. The vehicle speed performance while towing a trailer will return to normal when the load of the vehicle is decreased and the cooling performance returns to normal."

Subaru Australia had responded to my query that there is no need to add extra cooler though.

"I can confirm that your vehicle does not require any transmission cooler to be added. Changes in the vehicle approximately 2010 onwards saw an improved and larger cooling system added to the transmission, which means the transmission in your vehicle can cope with towing a trailer up to its maximum limit."

Cheers
Reply With Quote
  #9  
Unread 24th April 2015, 08:20 PM
Ratbag's Avatar
Ratbag Ratbag is offline
Administrator
 
Join Date: Jan 2012
Location: Bayside, Melbourne, Vic
Year: MY06, MY10
Model: Forester SG & SH
Transmission: 5MT/DR & 4EAT Sports
Posts: 6,225
Ratbag is on a distinguished road
Default

Gidday PS

I would be asking Subaru Australia why their advice is different from what is stated in the OM for your car!

Get it in writing ...
Reply With Quote
  #10  
Unread 24th April 2015, 09:06 PM
MiddleAgeSubie MiddleAgeSubie is offline
Forum Member
 
Join Date: Dec 2013
Location: AZ
Year: 2013 / 2008
Model: H6 5EAT OB with SubieLiftOZ kit / Tribeca
Transmission: 5EAT
Posts: 860
MiddleAgeSubie is on a distinguished road
Default

LOL: and so many think that Subaru towing ridiculousness is US-specific.

There are certain things that, I think, denote a small, uncertain company. Subaru was so laden with those till 2009-10 but the lack of clarity with regards to towing just keeps going and going.
__________________
18 4R TRDOP, 08 Tribeca
(13H6OB 2" SLOz, 06 B9)
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -3. The time now is 04:48 PM.


Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.