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D4D power band and shift points

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  • D4D power band and shift points

    As the Prado is my first 4x4/big car, and alsoy first diesel, I feel like I'm learning all over again.

    On the little car (Subaru), I would always ckange somewhere between 3k and 4k, but when I wanted to GO, is push it to around the 6k mark, where it kept pulling harder.

    Now I know max torque is lower on the diesel, but can't find a reference anywhere to where exactly.

    So, anyone know the power band, and roughly at what rpm do you change at?

  • #2
    If it's a manual, which it sounds like it is, drive it by feel, not by numbers.

    The auto generally shifts somewhere between 2000 and 3500, depending on circumstances, occasionally lower, occasionally higher.

    You could try the same.

    Cheers
    2007 D4D GXL.Suspension by Ultimate, Minto - modest lift.DIY shelf unit (help from ORS, Narellan).Polyairs.Dual batteries with RanOx smart DC-DC charger.Towing a Kimberley Karavan with another RanOx.

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    • #3
      have a look here http://www.redbook.com.au/cars/resea...&Ridx=0&eapi=2. cheers samo
      had an 03 gx 120 with some gear now got a 2013 bt 50 GT auto some ARB gear.

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      • #4
        When I had the diesel would be vary rare for me to change over 3g, revving the crap out of it for nothing and didnt pull any harder. With the D4D and the modern diesel most will rev freely like a petrol to redline but actually be pulling, while I wouldnt drive it like that everyday at least you can if need be. I reckon the sweet spot is around two grand BUT totally depends on what your doing where your driving, what your towing etc.. As said above Id go by the ear and feel, if its labouring then you have changed too early or need to change back. When I had my old 2.8D hilux and if going down hill would be in 3rd gear within 200 metres. The engines are so different today to when I had my hilux (no turbo). In sand you might find your self in different situations every time you drive on the sand due to wether the sand is soft/powdery or compacted down will totally depend on wht gear you need to be in for eg if want ing climb a sand dune pick the write gear you no you will need to climb the dune then keep it there, try changing from say 3rd to second 1/2 way up a sand dune and you will lose total momentum, this is what I have found anyway, I may be totally wrong and sure some one will say if Im incorrect but this is what I have found........No need to rev a diesel anywhere like a petrol as the torque and turbo will keep you humming along........Cheers Steve
        Steve M
        Addicted PP Member
        Last edited by Steve M; 05-12-2011, 07:36 AM.
        Face lift 150 Prado V6 auto. No mods yet

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        • #5
          Originally posted by 4xx4 Driver View Post
          drive it by feel, not by numbers.
          Which would be a great idea had I not driven petrol engines exclusively for the last 20 years. It's quite uncanny how you just know from the sound and vibrations when to shift, but it's just so different when the shift points appear to be a lot lower in the rev range than what your intuition tells you.

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          • #6
            Yeah most will find with petrol you will rev it to average at 3/4g between shifts where diesel is around 2/3 about 1000rpm difference, this is for myself anyway, if very gentle on the throttle my 120 petrol will be in 3rd within 200 m gentle down hill slope, the shifts are failry low in the rev range in the 120 petrol which suprised me, plant it but and will go straight to redline every gear, I found when I had the turbo diesel in the 95 when you planted the boot it held too long between shifs, used to annoy me but nothing you could do was all computer controlled, seemed to just sit there for a few seconds like it was thinking "mmm cant go any further in this gear, better choose another"" obviously this was for auto not manual like your refering to.....Cheers steve
            Steve M
            Addicted PP Member
            Last edited by Steve M; 05-12-2011, 12:17 PM. Reason: spelling
            Face lift 150 Prado V6 auto. No mods yet

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            • #7
              D4D power band and shift points

              I tend to change up very early - usually no more than 2000rpm - to keep fuel consumption as good as I possibly can (I'm possibly a bit obsessive about it if the truth be known). And my truck is also my first "serious" 4WD and first diesel too (upgraded from a Subi 2 litre Forester). Obviously if there is a real need I will rev higher, but around town and unladen 2000rpm seems plenty, and I can easily achieve around 8l/100km under those conditions. Love that D4D!
              White 08 Standard with ABS/cruise option pack, D4D/6-man, std 6" steel rims with Cooper AT3 235/70R17s, added roof rails, bullbar, towbar, ScanGauge II, custom-built aux power pack, Bushman multi-capacity fridge on slide, on DIY removable false floor. Often towing an Ultimate camper-trailer.

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