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4l60e better shifting

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by Milesvtcalais, Mar 24, 2020 at 6:46 PM.

  1. Milesvtcalais

    Milesvtcalais New Member

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    Hi all, I was talking to a transmission specialist today and we were talking about shift kits for the 4l60e and he mentioned that you can adjust your force motor screw around 1/4 of a turn and it will raise line pressure and improve shifting. Well anyway I've got another transmission sitting around that I was planning to put into my car (not because mine is stuffed just because it's got lower km) so I know there are alot of people on this app who have some pretty decent advice and experience on transmissions so I thought I'd ask. What are some free modifications I can do to my transmission to improve shifting and overall enjoyment? I'm prepared to kill my transmission just to test this and I'll report back with answers to said modifications. When I say free modifications I mean that force motor screw and other similar things. I'm really planning on chirping 1st to 2nd eventually and I'd love to see this happen without breaking the bank
    Thanks for reading all and please give me some advice
     
  2. losh1971

    losh1971 Well-Known Member

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    This is a cowboy mod and can cause problems if the amount turned is too much. A decent trans tech would be unlikely to recommend this mod. 1/4 turn could be enough to cause issues and once done it can not be reversed. I was offered this on my trans by a tech. I declined and I will no longer use him as that was enough for me to question the quality of work he does.
     
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  3. ant797

    ant797 Active Member

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    Can get cheap shift kits off ebay if you want to mess around come with various springs to hold gear as long as you want
     
  4. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    The TCM commands line pressure by sending a PWM signal to the PCS solenoid, PCS regulates Torque Signal pressure which pushes Boost Valve which thru spring pushes Pressure Regulator valve which regulates Line pressure.
    Messing around with these screw will unbalance the box so if the TCM thinks it was too harsh so it sets the shift learning to softer. You need more than a 1/8 to 1/4 turn to fix your desire feel, get a new shift kit for the spare and change it over and see if you like the feel if not then your better off having a Transmission place use a tech tool to adjust the settings.
     
  5. ant797

    ant797 Active Member

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    Watched a video on bipassing the tcc pwm solenoid by filing a chanel into it so the fluid bipasses it not sure what this will do other then stop your transmission from slipping between gear changes proberly get bit of a jolt in changes after that
     
  6. Milesvtcalais

    Milesvtcalais New Member

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    Hi there, I've looked into these shift kits and unfortunately the stage 1 kits include a overdrive or 4th gear lockout. I kinda like 4th gear not that I use it often but I drive my car to the track so its helpful for cruising
     
  7. Milesvtcalais

    Milesvtcalais New Member

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    Hi there, could you please send a link to this?
    Regards
     
  8. Milesvtcalais

    Milesvtcalais New Member

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    As mentioned I'm not worried about issues as the transmission has done its fair share of kilometers and I've got a new one to go in. It will be quite good to either see it work perfectly fine or go out with a bang
     
  9. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    There are no simple free mods or everybody would be doing them. There is some stuff that can be done in the tune but any real changes need to be done mechanically.
     
    Last edited: Mar 25, 2020 at 3:28 PM
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  10. ant797

    ant797 Active Member

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    Sorry it wasnt for between gear the tcc pwm solenoid i i forgot its just for when the tcc solenoid locks heres the vid anyway
     
  11. Milesvtcalais

    Milesvtcalais New Member

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    Thanks bro, I'll look into it but I think it's only for older transmissions
     
  12. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Not at all. the PWM solenoid was added to the TCC circuit in late 94 to the 4L60e to "smoothen" the torque converter lock function. The problem is that over time this wears out and prevents the torque converter lockup from working correctly. This is something I modify in the tune but you can also mechanically bypass it. One company supplies a clip that locks up the solenoid and stops it working. Never seen it done like that before.
     
  13. Milesvtcalais

    Milesvtcalais New Member

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    Well unfortunately I've for bigger problems on my table... today I installed some roller rockers and when tightening the batter back up I shorted out the positive terminal on the batter tie down point. Didn't think much of it because I have done this exact thing before (stupid me) but now whenever I go to start it it fires and kinda runs for a few seconds and then stalls, let it sit for a few minutes then it kicks over again and stalls.
    If you have any suggestions please help as it would be greatly appreciated
     
  14. losh1971

    losh1971 Well-Known Member

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    Next time tighten the clamp down, the pos then neg. Last thing to put on is always the neg lead that way it won't arc out if you accidentally touch the body.
     
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  15. Milesvtcalais

    Milesvtcalais New Member

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    I have to tighten the negative and positive down before I tighten the clamp because the body is in the way
     
  16. ant797

    ant797 Active Member

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    Try feeding it start you bastard see if it runs longer if so you have fuel supply problem maybe
     
  17. ant797

    ant797 Active Member

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    Wouldnt there be an emergency fuel cut off incase of an accident maybe you have triggered that somehow ..maybe try disconnecting battery for a bit see if something resetts
     
  18. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Probably blown the main fuse or one of them.
     
  19. Milesvtcalais

    Milesvtcalais New Member

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    Hey mate, I pulled the throttle body apart and it absolutely stinks of fuel. I'm only getting spark for the 1st second of turning it over so I believe I have triggered the imoboliser as this is the symptoms. The exhaust is full of fuel you can smell it there aswell especially when you let it sit and then try and fire it up again and it makes a massive bang noise which I believe is a backfire. Not to worry as im I'm quaratine and I've got weeks to fix it
     
  20. Milesvtcalais

    Milesvtcalais New Member

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    Yeah I disconnected the battery for 15 minutes as this is the reset time I believe, no change still only fired for a second then backfired. It's getting heaps of fuel just no spark
     

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