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What mods need to be done put a 6l90e into a Vf

Discussion in 'VF Holden Commodore (2013 - 2017)' started by br77, Mar 14, 2018.

  1. br77

    br77 Member

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    Hello guys,
    I am wondering what needs to be done to fit a 6l90e into a Vf. Thinking of getting a Lsa conversion done in the future.
     
  2. Skylarking

    Skylarking Well-Known Member

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    I didn't know what a 6L90E was so googled it.

    This page is interesting and indicates the 6L90E was a 1 3/8" longer and stronger version of the 6L80E. Both these boxes are modular and use bolt on bell housings. Presumably this means bell housings could be swapped if needed and you possibly the box's extra length may require a shorted tail shaft.

    Other than the mechanical issues, i think there may be electrical/logic issues as i understand items have the VIN programed within their electronic moduls and must match the other electronic modules in teh vehicle.

    But it's all speculation on my part as i've never worked on these fandangled new electronic contraptions...
     
  3. br77

    br77 Member

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    Thanks mate. Yea, I think you are right, tail shaft may need to be shortened.
     
  4. lmoengnr

    lmoengnr Well-Known Member

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    If you do an LSA/6L90E conversion, think about getting an HSV tail shaft/diff combo.
     
  5. SnowDoggyDogg

    SnowDoggyDogg 2ltr? = Only milk & juice

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    Good luck fitting the 9.9" diff.
     
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  6. Skylarking

    Skylarking Well-Known Member

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    Why?

    I'd have thought HSV wouldn't have done major structural work to fit things as their costs would blow out too much. Possibly Holden could have done structural things on their assembly line but i always understood the doner vehicle was a standard Holden build shipped to HSV for their modding.

    So i'd speculate/hypothesis/guess it would be a matter of removing the spare wheel carrier and installing some custome HSV brackets, maybe welded in place. So in theory reletively simple mechanical mods if you can source the bits somewhere.

    But i could be 100% off base so please explain why you'd say good luck fitting a 9.9" diff as i'm curious to learn ;)
     
  7. Forg

    Forg Well-Known Member

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    I think it was always an HSV-targeted vehicle ...for example, I think the LSA+'box were fitted by Holden?
     
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  8. Skylarking

    Skylarking Well-Known Member

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    A HSV-targeted vehicle could simply be an identifier to let assembly workers feel extra pride when screwing their bit into the vehicle in the hope they are better built that the run of the mill unots. Possible part marketing fluff to make HSV owners feel that little bit more special.

    But i don't know any details though i've seen pictures of Holden vehicles fitted with dicky transport wheels when shipped to HSV where these transport wheels are then sent back to Holden for reuse... I've also read somewhere that HSV were pulling out Holden installed V8 engines and installing their charged mills which left HSV with a bunch of engines for sale (seems Holden wasn't taking them back). Then on these forums there there were statements that HSV pulled fenders off doner Holdens and installed their own bespoke fenders on i think the GTS-R W1? leaving them with a bunch of VF Series 2 fenders for sale. So HSV-targeted, maybe not so much.

    Now my view is that vehicle manufacturers are notoriously cheap and don't like making changes, especially structural to floors just to install a diff, otherwise there is big complience costs involving crash testing. As such i'd guess the big diff is a bolt on proposition, maybe with some bespoke HSV brackets...

    It's any ones guess until someone in the know actually drops some facts which can be backed up. Pictures would be great, i like pictures :D
     
  9. chrisp

    chrisp Active Member

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    The HSVs don’t have the composite spare wheel well. Instead they have a flat composite panel fitted in its place. (I think that it is the same panel fitted to LPG vehicles???). The diff assembly in the HSV is quite big and has an oil cooler/radiator fitted near by so they delete the spare wheel space to fit it.
     
  10. br77

    br77 Member

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    Two possible easy options here, get the rear end from a wrecker, or get a 4l80 to adapt an aftermarket diff
     
  11. 3rspecB

    3rspecB Well-Known Member

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    LS9 was fitted at HSV. LSA and its drivetrain was fitted by holden assembly plant.

     
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  12. Skylarking

    Skylarking Well-Known Member

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    Interesting video but it seems a rather inefficient process really.

    Can't see why HSV couldn'y pay Holden to install much if not all of the HSV componentry in Adelaide at build time, then do final inspection and programing at a HSV specific section of the Holden plant before the vehicles are shipped off to the HSV dealer network arond Australia. Guess it's a combination of contract issues, phsycological issues and management issues as to why it's done the way it is. Building a vehicle, then rebuilding it some 1000kms away simply seems waistfull and unessesarily costly.

    Guess we'll see more of it with the camaro that GM couldn't see the benifit of designing/building in RHD.. Meanwhile Fords laughing on the way to the bank.

    Probablty the biggest take on the HSV video is that they use a bolt in parts process as there is nothing structural done to the body. No welding in of any brackets, braces or other body underbody modifications (changing bolt in fenders don't count in my view). Still, nice cars though ;)

    Good luck to@br77 in his modding endevours :)
     
  13. SnowDoggyDogg

    SnowDoggyDogg 2ltr? = Only milk & juice

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    Taken from a 2013 drive article:

    Besides its supercharged LSA 6.2 litre V8, the GTS has different subframe mountings, different transmissions, a rear subframe borrowed the Camaro ZL1 (which is also the source of the engine) and a brake package that’s exclusive to the GTS.

    I'm imagining the ZL1 rear subframe is a necessity for the large ZL1 differential. This would explain why I've got no boot in my GTS if I want the luxury of a spare. They just couldn't (be bothered to) engineer it to fit.

    I remember there was a lot of 'shoe horning' to get this project across the line.




     
  14. Skylarking

    Skylarking Well-Known Member

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    Guess the term “underbody modification” could mean bolting on the subframe but I meant it as modifying the underside of the body with welded in braces, etc. Ive no doubt HSV did some good work to get it together and across the line but as I understand it’s all bolt on stuff which in itself is not a bad thing.

    However, I can’t see that it would be cheap for the OP to source and fit the required subframe, bigger diff and it’s cooling, stronger gearbox, tailshaft, etc, etc. I’d think it may be more cost effective to sell his VF and buy the HSV which has been done correctly and without shortcuts... also easier to insure.
     
  15. 3rspecB

    3rspecB Well-Known Member

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    Body reworks to fit LSA rear end was done in Adelaide when building LSA specific bodies. HSV had a lot of input from GM/GMH with the VF GTS. 1st mules for VF GTS LSA where built by Holden Engineering in Port Melbourne. I was lucky enough to drive one of the mules and it was an absolute beast, due to not having esc/traction cals at that particular time.
    From memory I don't think the LSA rear diff will fit in a standard commodore rear cradle, so yeah will be an expensive excercise one thinks.
     
    Last edited: Mar 16, 2018
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  16. Skylarking

    Skylarking Well-Known Member

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    Interesting stuff :)
     
  17. monstar

    monstar Naturally as-pirated

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    Why would you go to the trouble again, like specifically? The torque convertor fits into the 6L80, with proper tune it will not break with even LS9 torque.
    I definitely wouldn't do it. OP speak to a trans specialist who offers rebuilds and upgrades to get the tech skinny but is ridiculous vs swapping the best bits into 6L80.
    Bolting on an LSA blower is not that much of a torque upgrade to warrant it.
     
  18. Ccoastcalais

    Ccoastcalais Active Member

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    I have done 4l80e conversion in my Ve clubsport. I know it's not exactly what your asking but similar process none the less. Getting the box physically in the car was the easy part, getting the car to run was a whole different story. Lots of trouble with software, fault codes, misfires, non start issues, inhibitor issues. Just turned into a long very expensive process. My recommendation is just don't do it! Sell your car & buy a hsv, much cheaper & less stressful process.
     
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  19. br77

    br77 Member

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    Get opinions from you guys are quite useful, especially when doing the budgeting . If there are lots of unexpected, it will blow my budget for sure
     
  20. Chubba

    Chubba New Member

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    If your referring to the RHD Mustang cash cow then it's not producing like it used to thanks to an ANCAP 2 star rating. Its now a 3 after adding some safety gear (which I read elsewhere they stripped from it for the Aussie market but kept for others) but still had some inherent design issues that needed rectifying.
     

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