Boagie (5th September 2011), rusty_nail (24th January 2012)
Can't see why you would want to risk it. If 4th is bullet proof, why wouldn't you use it.
Is gearbox different in 2000 4.2 diesel to 2004 4.8 petrol? my mate tows in his 4.8 in 5th no probs , do I need to look out in the 4.2?
gidday, ive towed a 2 ton van plus my dx ute 2000 4.2 non turbo was loaded to 400 kgs, from Vic to Wa , i found in 5th it overheated, i used 5th only in tail winds, or down hill, havn't had any problems yet, heading to Pilbara when it cools down a bit , towing in 4th i sit on 80 to 90 and don't have much power to spare ,ut at least i get there, get about 400ks from main tank, cheers Bazz Margret river
Boagie (3rd April 2012)
hey bazz,re it getting hot in 5th...have you had your cooling system flushed and reverse flushed and put some quality coolant in her????
You don't drive...you patrol!
99 gu dx 4.2 diesel cab chassis - "THE GOLD DIGGER"
gidday , yep had system overhauled, still gets hot in 5th , just drive to conditions...
Boagie (8th April 2012)
Hmm thread dig but I can't find any additional info.
So the story is for me owning a 1990 GQ I do not have the weak 5th spline?
Towing my 2 tonne van I always kept in 4th but with my 4:6 ratios its screaming trying to keep at 100kmh let alone 110. Sweet spot seemed to be at 2600rpm at 90-95kmh but that's a hindrance to traffic. 100kmh was around 2800 and 105, 3000, etc.
I did a test yesterday coming back from the NSW border and 5th gear the whole way back on flats and downhills (some slight inclines) with RPM at 2200-2400 at 100-110kmh and it loved it, temps, EGT's and keeping up with the traffic.
Hoping thats ok?
Obviously read conditions and drop it back on hills, etc but I have never done that towing that kind of weight but it seemed to love it!
Overtaking softy 200 series owner Nomads saving on fuel with their 45 foot van felt good too with the old beast...lol
PeeBee (2nd October 2018)
Yeah thought about that too, even not towing with increased performance from the old td pretty much pull up even the biggest hills in 5th and must put much more strain on things than standard. Thinking about the 5th gear upgrade from Mark's maybe one day as even in 5th feels like it's legs could be longer at 100 and especially 110. . Think that gives increase in strength i think.
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