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Techniques Winching - Recoveries - Chainsaw Safety - Proper aproach to 4wding etc

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  #1  
Old 12-04-18
&Roo &Roo is offline
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Default Techniques for towing vans up hills

Weíve just driven some pretty mountainous country from Melbourne to Ballina via Dargo, Jindabyne and Tenterfield pulling a 2.5T van with our Auto 2013 NW.

Following the wisdom on this forum, weíre towing in 4H, 4th gear. Open road towing has been easy, but no surprises the Paj has struggled with a few of the hills.

Iím worried some of this is driver error from not selecting lower gears early enough and would love to know other driversí techniques for hills.

Iíve been aiming for good speed at the base and then to maintain 2500-3000rpm through the climb. Typically this means a change down to 3rd at 80-90kph (on the dial) peaking at a little over 3000rpm or the revs drop straight to low 2s and the speedo dives.

A couple of monsters have required another shift down to 2nd at around 50kph on the dial and a lot of encouragement.

(I donít have any gauges ATM but have been reading the forums and know an ultragauge should be a priority on my eBay shopping list)



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Old 12-04-18
Pwoffey Pwoffey is offline
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I don't see that there's much you are doing wrong. If you had a Scangauge or Ultagauge etc, then I suspect you would change down a bit earlier as you see the ATF temp climb (and it does so very quickly). But at the end of the day you are asking a 4 cylinder 2.25T (kerb wt)/3T (fully loaded) tug to haul a 2.5T (loaded wt?) van up some long hard hills. It's not going to be zippy.
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Old 12-04-18
spot01 spot01 is offline
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As mentioned, this usage results in very high ATF temps, which dramatically shortens the life of the fluid.

For heavy towing, the handbook shows ATF should be changed I think every 90k (check the book). Depending on history & kms, might be worth considering a change now - then you will know its good. Be sure to use the correct fluid (genuine if in any doubt) - its expensive, but transmissions are much more expensive. Note there are a few other service items that need to be done more frequently if doing much heavy towing, eg, oil/filter, etc (refer handbook).
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Old 12-04-18
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Maybe aim for 2800-3400. That way as it starts to lose momentum it still has a bit more torque to use. A nearly 3 tonne brick pulling another 2.5 tonne brick up a hill is never going to be quick, let alone easy. Dont be afraid to use 3rd gear. Maybe try lighten the load as much as you can too.
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Old 12-04-18
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My recent exposure to towing a 2.8T van at Xmas had me constantly watching intake and transmission temps via my Scangauge. An unlocked converter quickly results in transmission temps approaching 110deg. With the converter locked I didn't see much more than 85deg. Intake temps can also quite easily hit 100deg. The other worrying temp is EGT. On big hills I was constantly seeing 600deg which is not good. I'm hoping to improve all this in the coming 6 months with an M&M Lockup, intercooler and possible tune.

As said above towing a big van is a lot to ask for a little 3.2L Paj. I estimate my weight to be 5.6T fully loaded.

Benny.
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Old 12-04-18
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CATs 4x4 CATs 4x4 is offline
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Quote:
Originally Posted by NTBenny View Post
My recent exposure to towing a 2.8T van at Xmas had me constantly watching intake and transmission temps via my Scangauge. An unlocked converter quickly results in transmission temps approaching 110deg. With the converter locked I didn't see much more than 85deg. Intake temps can also quite easily hit 100deg. The other worrying temp is EGT. On big hills I was constantly seeing 600deg which is not good. I'm hoping to improve all this in the coming 6 months with an M&M Lockup, intercooler and possible tune.

As said above towing a big van is a lot to ask for a little 3.2L Paj. I estimate my weight to be 5.6T fully loaded.

Benny.
Benny

I don't think 600degC is too much for EGT in those circumstances, dependant in where the probe us situated. My reading on the matter has indicated that below 700degC is all good, so 600 is still well within usage limits I would think. Crazy high when you think of it, but still acceptable.

CATS

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Old 13-04-18
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Yeah problem is my probe is about 50mm off the back of the turbo in the dump pipe so I've taken 100deg off as a maximum.

Benny.
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Old 13-04-18
&Roo &Roo is offline
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Thanks @pwoffey, @spot01, @Dicko1, @NTBenny - thatís been reassuring. Have ordered an ultraguage and will try to use this to ensure Iím being as kind to the auto as I can while towing


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Old 13-04-18
Boo Boo Boo Boo is offline
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I have installed a temp guage at the oil outlet from the transmission to the cooler so we are getting accurate temps
The speed at which the temperature increases amazed me and changing driving style has an enormous effect on the temperatures.
I even found out that coasting down a hill in 5th gear increases oil temp fairly quickly.
Towing a 2 ton van on a flat road in 4th gear oil will be around 80 degrees and any slight incline will see the temps rise pretty quickly.
Really happy we installed ours.
The next thing will probably be a torque convertor lock up kit just waiting on MM 4x4 to develop it for the NS.
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Old 13-04-18
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I tow 2t and use 2nd and 3rd alot. Keeps the trans temp down considerably. With my oversized tyres i use 4th regularly just driving around.
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