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Thread: Transmission Tuning for JLR ZF; 6HP26, 6HP28, 8HP70

  1. #1
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    Transmission Tuning for JLR ZF; 6HP26, 6HP28, 8HP70

    This is a thing now, well actually has been for the last 6 months.

    Transmission tuning, for ZF 6 & 8 speed boxes.


    6HP26 in;
    L319, L320, L322
    2.7L, 3.6L diesels, 4.0L, 4.4L, 4.2L petrols

    6HP28 in;
    L319, L320, L322
    3.0L diesel, 5.0L petrol

    8HP70 *** in;
    L319, L322, L494, L405
    3.0L, 4.4L diesels, 3.0L & 5.0L petrols

    And the Jags too...

    IMG_2246.jpgIMG_2247.jpgIMG_8684.jpgIMG_1913.jpg

    (*** 8HP in the "new" models from 2017MY like Velar, Disco 5, and the 2017MY-onward L405 & L494 is still in development, coming soon!)


    Why tune the transmission?

    It pains me to say it, but JLR didn't have the budget for test & development like BMW, VW or the other guys had. So they got it "good enough to sell" and then sent it.

    Fortunately some very smart and dedicated guys have put in the effort to improve on the factory calibrations. Many months of road testing to fine tune the calibration.

    The benefits of the transmission tune vary a little depending on diesel or petrol.

    But generally speaking, faster and smoother shifts, the shift points are revised to better utilise the increased power in conjunction with an engine tune. Better throttle response, especially from a standing start.

    With the diesels the gear selection is altered to keep the rpms up so the motor doesn't lug.

    The torque converter lockup has been altered to stop wasting power, which in turn keeps the fluid from overheating.

    It picks the right gear at the right time, no delay or hesitation when you put your foot down.

    All around they drive much nicer, more lively & responsive. Makes the Land Rovers drive less like trucks, more like cars.

    The best real world example I can give, is when you drive through a roundabout. With the factory calibration you put your foot down leaving the roundabout and nothing happens while it tries to decide what you want... with the tunes it picks the right gear and you go.


    How?

    We need physical access to the vehicle to load the transmission tunes (as the TCM is inside the box) so I can do this for people in Sydney, or if you bring the car to me from out of town.

    Possibly I can make arrangements for people in the other capitals as well, though that relies on organising at least three people instead of two, so keep that in mind.

    The tunes can only be loaded with our equipment; cannot be done with IID, Nanocom or anything like that. Only we can do it.


    Can you fix my shudder? torque converter surge? etc...?

    No, we cannot fix mechanical problems with software. If your torque converter is shot, it's shot. If your clutch packs are worn out, they are worn out...


    How much does this cost?


    The transmission tunes alone are $880.

    When bundled with an engine tune this is discounted to $495, plus the cost of the engine tune (which is $1100 for diesels and naturally aspirated petrols).

    So $1595 for both tunes together on a diesel or NA petrol.


    It's hard to describe in words just how good these things are to drive after the tunes, but if you have any questions, feel free to ask!

    Cheers,
    Cameron.
    Freelander 2 HSE 3.2L - BUILD THREAD
    Jaguar XKR 4.2L S/C - Jaguar XJR 4.2L S/C - MINI Cooper S

    Old Jaguar Australia - www.facebook.com/oldjaguarau
    Upgrades and retrofits for late model Land Rover and Jaguar vehicles. www.oldjaguar.com

  2. #2
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    Good idea!

    I was looking at some 6hp26 mapping the other day, looks like there is plenty of scope for fine tuning there!

    Not that I know much...

    All the best.

    Cheers
    James

  3. #3
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    I've always thought the 6HP was woefully calibrated to make the most of the RRS TDV8
    Now 2016 D4 HSE 'Leo' and Steve the Triumph Speed Twin
    Then 2010 D4 3.0 HSE 'James'
    Then 2010 RRS TDV8 'Roger' w traxide DBS, UHF, Cooper Zeons, Superchips remap
    Then 2010 D4 TDV6 'Jumbo' w traxide DBS
    First love 2002 D2 TD5 'Disco Stu'

  4. #4
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    Quote Originally Posted by shack View Post
    I was looking at some 6hp26 mapping the other day, looks like there is plenty of scope for fine tuning there!
    Indeed there is. It's surprising how much can be done with them actually.

    Quote Originally Posted by Stuart02 View Post
    I've always thought the 6HP was woefully calibrated to make the most of the RRS TDV8
    It's true, but we've fixed it.

    Friday night we did a 2.7 D3, the owner was over the moon with the improvements in how it drives.

    Saturday a 3.0 D4, the guy was really impressed with it (700Nm and silky smooth shifts will do that).

    And tonight, a 4.0 petrol V6 D3 and the same feedback again, so much nicer to drive.

    The engine tunes have always been good, but the transmission tunes take it to a whole new level.
    Freelander 2 HSE 3.2L - BUILD THREAD
    Jaguar XKR 4.2L S/C - Jaguar XJR 4.2L S/C - MINI Cooper S

    Old Jaguar Australia - www.facebook.com/oldjaguarau
    Upgrades and retrofits for late model Land Rover and Jaguar vehicles. www.oldjaguar.com

  5. #5
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    Think I’m heading to Sydney once the Bug settles a bit more.

  6. #6
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    Quote Originally Posted by Tombie View Post
    Think I’m heading to Sydney once the Bug settles a bit more.
    Well I need to make a road trip to Adelaide once the borders are open, so maybe we can work something out.
    Freelander 2 HSE 3.2L - BUILD THREAD
    Jaguar XKR 4.2L S/C - Jaguar XJR 4.2L S/C - MINI Cooper S

    Old Jaguar Australia - www.facebook.com/oldjaguarau
    Upgrades and retrofits for late model Land Rover and Jaguar vehicles. www.oldjaguar.com

  7. #7
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    Am waiting for you to make a trip out West...when the beer bug subsides, of course!
    Life is just a series of obstacles preventing you from taking a nap.

  8. #8
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    Transmission Tuning for JLR ZF; 6HP26, 6HP28, 8HP70

    Quote Originally Posted by Cambo@oldjaguar View Post
    Well I need to make a road trip to Adelaide once the borders are open, so maybe we can work something out.
    Mate, you come down this way and I’ll bring at least another customer!

    And buy you a drink Transmission Tuning for JLR ZF; 6HP26, 6HP28, 8HP70

  9. #9
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    Whilst I'd very much like early TC lock-up in 1st and 2nd to use torque for quicker take-offs without lots of noise, I wouldn't want to move upshifts higher for my 8-speed 4.4 TDV8 considering that I already manually upshift. Manual up-shifting from 1st works best for me but not while turning as the paddles get lost so better to have decent auto programming. I'll be watching for 4.4 feedback.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  10. #10
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    Quote Originally Posted by Tombie View Post
    Mate, you come down this way and I’ll bring at least another customer!

    And buy you a drink Transmission Tuning for JLR ZF; 6HP26, 6HP28, 8HP70
    Looks like I'll be in Adelaide 1st-3rd December.

    Quote Originally Posted by Graeme View Post
    Whilst I'd very much like early TC lock-up in 1st and 2nd to use torque for quicker take-offs without lots of noise, I wouldn't want to move upshifts higher for my 8-speed 4.4 TDV8 considering that I already manually upshift. Manual up-shifting from 1st works best for me but not while turning as the paddles get lost so better to have decent auto programming. I'll be watching for 4.4 feedback.
    We did a 2011 L322 with the 4.4/8HP in Sydney a couple of months ago, both engine & transmission tunes, the guy was very pleased with it.
    Freelander 2 HSE 3.2L - BUILD THREAD
    Jaguar XKR 4.2L S/C - Jaguar XJR 4.2L S/C - MINI Cooper S

    Old Jaguar Australia - www.facebook.com/oldjaguarau
    Upgrades and retrofits for late model Land Rover and Jaguar vehicles. www.oldjaguar.com

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