upping transmision pressure.

[pillzor]

ive heard its just a matter of turning a dial under/in the transmission box , is this correct and more details please if so.

[hako]

If you mean tightening bands it cannot be done easily on the 4L60E Commodore transmission - there are "shift kits" but nothing you can do with the turn of a dial.

[delcowizzid]

no he means turning up the base pressure with the allen key headed screw under the shift solinoid

[hako]

no he means turning up the base pressure with the allen key headed screw under the shift solinoid

So what does this do?

[delcowizzid]

increases the whole base pressure of the trans to make up for wear and tear too much is bad but it can make a sloppy box like new again you can go too far and every gear is like a shiftkit and servo is in there and in the end the box goes

[pillzor]

yeh the box isnt sloppy at the moment i was just looking for an cheaper option than a shift kit , figured it would cause problems if upped too much but im not expecting shift kit like performanc, just something a bit better than i have now until i can get a shift kit done.
im going too get the oil filter changed and a service done soon just because its due so what harm can be done by a few turns of an allen key while the box is open.

[delfin82]

Its the pressure solenoid that can be adjusted not the shift solenoid, does your box delayed in shifting or maybe flaring?

[delcowizzid]

the pressure adjuster is underneigth the the shift solinoid not the shift solinoid itself 1/8th to 1/4 of a turn should be plenty

[pillzor]

Its the pressure solenoid that can be adjusted not the shift solenoid, does your box delayed in shifting or maybe flaring?

i have a tune in it from delco atm that shifts later under hard throttle, the box seems too slip a little bit when revving the guts out of it at higher rpm, its fine with the normal tune in it i just feel like im losing a bit of potential acceleration.
by slipping at higher rpm i mean the engine screams and the tacho shoots up what seems faster than the car is actually pulling if you know what i mean once its shifted up its fine.
i think its holding the rest of the mods back really.

i should add that it does take a second too click into drive when in park as you asked , i have no idea what flaring is though.

[delfin82]

i have a tune in it from delco atm that shifts later under hard throttle, the box seems too slip a little bit when revving the guts out of it at higher rpm, its fine with the normal tune in it i just feel like im losing a bit of potential acceleration.
by slipping at higher rpm i mean the engine screams and the tacho shoots up what seems faster than the car is actually pulling if you know what i mean once its shifted up its fine.
i think its holding the rest of the mods back really.

i should add that it does take a second too click into drive when in park as you asked , i have no idea what flaring is though.

Flaring is like the box hesitate to shift to next gear and when it does, it feels like slipping. delayed is what you mean when it put in drive, could be worn friction clutches, thats why it need more oil pressure to push the piston and clucthes to engage, seal in piston become hard already that why it losses line pressure, or by adjusting the pressure solenoid can help with it.

[pillzor]

cool thanks for that info, that sounds like what its doing under high revs.

[jashdown91]

My transmission is flaring. Everytime i put my foot down to go, it will flare like crazy and take it's time to shift. On top of this, is takes about a second or so to go from park to drive, or reverse to drive. Same problem as above?

[pillzor]

mines not really a problem , i just want it tighter too handle the extra power from the mods ive done.
i mean it takes a second too select gear from park but on take off it holds fine, infact got wheelspin today for the first time while the motor and trans was cold ( i usually granny drive till its warmed up) , thats was going from 0 - 60 with third selected.. my problem only happens at higher rpm if im gunning.

[westbad]

my auto has stopped selecting reverse gear.. was looking at getting a new transmission.. could adjusting the pressure fix my problem with selecting reverse? and if so how do i adjust it?

[ragrim]

Hmm this tightening is interesting... my box hesitates changing from park to drive or rev to drive and vice versa, a good 1 to 2 second delay, also when changing from 1st to 2nd and 3rd to second under heavy accelaration it slips like mad, car revs out then the gear engages and feels like i just dropped the clutch...

is it possible this tightening could somewhat help my box at all or is my sloppy box just screwed?

[Acclaim96]

the pressure adjuster is underneigth the the shift solinoid not the shift solinoid itself 1/8th to 1/4 of a turn should be plenty

Any pics of this?

[delcowizzid]

nope.......

[Acclaim96]

so where exactly is this the solenoid located? Can it easily be located to adjusted?

[delcowizzid]

as far as im aware under the drivers side rear solinoid is the alen key headed bolt goes up into the trans its just obscured by the solinoid

[Acclaim96]

so u turn it to clockwise?

Anyone with pics? im still trying to think of where it is

[pillzor]

dont turn it up too much if you do!

[SirBedevere]

Giggle, I can see lots of exploded boxes thanks to you Pillzor!

[QuickVRII95]

So what does this do?

Boosts Line Pressure & Gives Quicker Shifts At Higher Revs etc... Noticeable If Your Car Has More Power & It Doesn't Like To Shift Properly Between Higher Revs (Revs Gears Out etc)

Try To Get As Much Info About The Desired Setting For "Your" Car (ie Power) ... Because You'll End Up Draining Your Transmission Fluid Again & Again, By Always Having To Take The Pan Off & Adjust It...

[QuickVRII95]

dont turn it up too much if you do!

KABOOM!!... Learnt That The Hard Way...