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I supported Toymods
Location:
Australia
Registered:
November 2003
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Holden T700 Gbox
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Wed, 05 January 2005 00:48
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I know I'm going on a long shot asking this, but hey, someone might know.
I'm putting a mates VN SS back togethere after pulling the motor to replace the rear main seal.
The auto tranny (Turbo700) has a vacuum controlled upshift, and hence has a vacuum line coming out of the gbox.
This is to plug somewhere into the plenum.
Thing is, I can't find where.
There are 2 vacuum ports infront of the throttle body, these go to the charcoal canister.
There are 2 behind the throttle body, one goes to the MAP sensor, one goes to the FPR. No "T's" in them as far as I could see.
There are 2 at the back, one goes to the brake booster, and one splits off to inside the cabin for the heater controls and the other goes I think to the cruise control.
I can't find where the tranny hose plugs in.
I looked with a torch for a few mins, but found nothing.
Has anyone come across this before?
Or knows where it goes?
Cheers.
[Updated on: Thu, 06 January 2005 04:50]
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 03:19
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Car is on the road now, and I'd like to fix it
If no one has any idea, I'll let it fall off the page...
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Location:
sydney
Registered:
March 2003
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 03:47
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| sideshow wrote on Thu, 06 January 2005 11:40 |
but i thought usually has a t piece of the one that goes into
dash thru the firewall
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There is a T-piece back there.
One way goes off to dash through firewall
Other way goes off to some big ball under the car under the airbox. I think its just a vacuum chamber so the heater control still work under full throttle.
Could I just 'T' it into the MAP sensor line? or is that the only line I should leave alone?
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 03:48
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maybe u have a t400 auto gbox
they have a vac modulator
i would t piece into the vac line that goes inside the cabin
sometimes the vac port that goes to the brake booster has
another small port comin off it
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 03:49
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yer dont touch the map sensor line
just t in into the vac port that goes to that vacuum tank
make sure its close to manifold and before vac tank
not after tank
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 03:55
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Yeah, sounds like T'ing it in is the only way.
I just want to know why it wasn't connected.
Its an SS, so it SHOULD be the T700 not the T400, but you never know.
Thanks sideshow
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:31
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well all i know is a t400 is hydraulic dontrol
a t700 is all electric control from the engine ecu
and all vs v8s are electronic
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:34
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| sideshow wrote on Thu, 06 January 2005 12:31 |
well all i know is a t400 is hydraulic dontrol
a t700 is all electric control from the engine ecu
and all vs v8s are electronic
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Oh, all T700 are electric, well this is definately not electric control.
Only electrics are VSS and reverse/neutral safety switch.
Must have been the later SS's that got the T700.
Must be a T400.
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:40
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im not to sure about what nmodels what
but i think somewhere thru vr models they changed
not to sure
i thought all vs v8 auto waselectronic controlled
so if im right someopne has swapped it in the past
if im wrong then maybe halfway thru they changed from a vr setup
to the late vs setup
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:45
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| sideshow wrote on Thu, 06 January 2005 12:40 |
im not to sure about what nmodels what
but i think somewhere thru vr models they changed
not to sure
i thought all vs v8 auto waselectronic controlled
so if im right someopne has swapped it in the past
if im wrong then maybe halfway thru they changed from a vr setup
to the late vs setup
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Its an VN SS, not a VS.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T400 Gbox
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Thu, 06 January 2005 04:49
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Its definately a T700 though.
Early models much have been vac controlled.
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:54
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opps sorry
then its def a t400
so just t piece it into a vac source near the manifold
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:56
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| sideshow wrote on Thu, 06 January 2005 12:54 |
opps sorry
then its def a t400
so just t piece it into a vac source near the manifold
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Nah, def T700, and def original
t400's are 3spd's.
I'll just T it in.
Fucknose where it went when it rolled out from the factory.
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Location:
sydney
Registered:
March 2003
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Re: Holden T700 Gbox
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Thu, 06 January 2005 04:57
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ok cool
the t400 is very old box now i remember
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Thu, 06 January 2005 07:21
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THM400 = old school, tough, 3 speed
THM700 = 4 speed, all VN and VPs, non electric, kickdown cable, lockup converter
4L60E = 4 speed, electronic control, lockup converter
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Fri, 07 January 2005 01:53
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There are two different T700 Boxes...
The first is the 4L60
The second is the 4L60E
The 4L60 was used from the VN through to the VP and VQ, at which point it was replaced via the 4L60E...
The difference in the two boxes... One runs the kickdown and vacuum cables, the latter is electronic controlled...
Your mate has the 4L60 box, (Vacuum controlled)
A much better box... Takes the power better when swapping diffs because it avoids having to have the ECU shift points remapped...
Unfortunately I can't tell you where to hook the vacuum line to... BUT
Try out http://www.streetcommodores.com.auVery helpful bunch when it comes to Commodores...
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Fri, 07 January 2005 12:08
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As for taking the power better, remapping the ECU for shift points/line pressure will give a nicer result than anything. Just a matter of having to DO it, which is something most never bother with, when they bitch about 'damned electronic' autos. Also, the 4L80E is the big brother box from some US cars/trucks, much tougher.
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Location:
Brisbane
Registered:
June 2003
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Re: Holden T700 Gbox
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Fri, 07 January 2005 12:10
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turbo 700 in a VN should be hydraulic?
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Location:
Brisbane
Registered:
November 2003
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Re: Holden T700 Gbox
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Sat, 08 January 2005 07:26
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yep, TH700 - as mrshin and kyosho said: hydraulic valve body with vacuum modulator for upshift
Not sure exactly were it goes on a VN but you want it plumbed to ported manifold vacuum (like brake booster)
It should already have a place to hook up considering it was all factory. Maybe visit a car yard and have a look at any VN/VP v8 calais/commodore/statesman...
ditto commodore forums would be v. helpful.
cheers Mark
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Registered:
April 2004
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Sat, 08 January 2005 11:41
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| Doubledip wrote on Sat, 08 January 2005 19:31 |
as sideshow pointed out the TH700 doe snot have a vacuum modulator...it has a cable which is attached to the throttle plate....the only vacuum line on a th700 is a breather which comes out of the top of the box near where the bell housing starts....is this where you are seeing the hose....
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Yeah, exactly where you said.
So its not for upshifting?
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Registered:
April 2004
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Holden T700 Gbox
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Sat, 08 January 2005 11:51
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w00t, thank you SO much for that.
Saves me pissing around trying to T it into the vacuum.
I'll have to remember that for the future.
Cheers dude.
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Sun, 09 January 2005 05:06
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| mrshin wrote on Fri, 07 January 2005 23:08 |
As for taking the power better, remapping the ECU for shift points/line pressure will give a nicer result than anything. Just a matter of having to DO it, which is something most never bother with, when they bitch about 'damned electronic' autos. Also, the 4L80E is the big brother box from some US cars/trucks, much tougher.
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The 4L60E also had a couple of internals changed when it went electronic from auto, and it became useless for continously down shifting with the stick (Driving the auto like a manual) and they end up shitting themselves...
My mate has had 2 boxes rebuilt now (in 12months) and both been done at different places, and both told him it was because he drove it like a manual... So now he has stopped driving it like a manual...
But yeah, it throws something into one of the clutches and destroys em... Not good...
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Sun, 09 January 2005 09:50
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The 4L60's are a mixed bag, but the later ones are less abuse tolerant than the earlier ones, because they have more plastic parts inside them.
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Sun, 09 January 2005 09:54
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| mrshin wrote on Sun, 09 January 2005 20:50 |
The 4L60's are a mixed bag, but the later ones are less abuse tolerant than the earlier ones, because they have more plastic parts inside them.
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Yeah pretty true...
And the annoying thing, the electronic box (4L60E) has a "Driver Abuse" feature... Where no matter what, if you peak first gear 5500RPM, it would shift into second, no matter what...
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Sun, 09 January 2005 09:59
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Yeah, I know 
Thing is, 5500, especially on a stock Buick six, is pretty hard to find anyway, and definately pointless. Finding it really is nothing more than proof that you're a heartless bastard.
I shoodna said that - how would I know about the upshift to 2nd??
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Sun, 09 January 2005 10:02
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| mrshin wrote on Sun, 09 January 2005 20:59 |
Yeah, I know
Thing is, 5500, especially on a stock Buick six, is pretty hard to find anyway, and definately pointless. Finding it really is nothing more than proof that you're a heartless bastard.
I shoodna said that - how would I know about the upshift to 2nd??
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Ha ha ha... Our VS hits 5500RPM everytime it is at WOT... Damn thing runs outta power at 5200RPM (Major drop off after that)
Should shift at 5000RPM but the damn thing won't... And it's stock... Wierd... The VT S does the same... Really bad when overtaking...
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Sun, 09 January 2005 10:07
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We've got a couple of VRs, and they're well and truly over by about 4500 
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Sun, 09 January 2005 10:14
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| mrshin wrote on Sun, 09 January 2005 21:07 |
We've got a couple of VRs, and they're well and truly over by about 4500
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I feel lucky then that ours still pulls to around 5000RPM... Supposedly max power is at 5200RPM from memory, but we all know KW is only torque by RPM, and thats a fair high RPM, so yeah, not necesarily the best "torque" area... LOL
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Sun, 09 January 2005 10:20
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Well, a VR is supposed to manage a mighty 295Nm of torque (from 3.8 litres... but hey...). A few taps on the quackulator tells me that if it could maintain that until 5500rpm, you'd have nearly 170 Kw. Factory only claims 130. Therefore, torque must have dropped to under 240Nm by 5200. Oh dear...
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Location:
Wollongong
Registered:
November 2004
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Re: Holden T700 Gbox
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Sun, 09 January 2005 10:25
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| mrshin wrote on Sun, 09 January 2005 21:20 |
Well, a VR is supposed to manage a mighty 295Nm of torque (from 3.8 litres... but hey...). A few taps on the quackulator tells me that if it could maintain that until 5500rpm, you'd have nearly 170 Kw. Factory only claims 130. Therefore, torque must have dropped to under 240Nm by 5200. Oh dear...
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That's why I'm glad the ecotec holds to 147KW...
Can I just ask, what is the formula you use to work your power/torque out etc?
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Holden T700 Gbox
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Sun, 09 January 2005 11:18
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HP: (ft. lbs x RPM) / 5252
KW: (Nm x RPM) / 9550
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Location:
Wollongong
Registered:
November 2004
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Location:
Brisbane
Registered:
November 2003
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Re: Holden T700 Gbox
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Wed, 12 January 2005 10:46
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| Doubledip wrote on Sat, 08 January 2005 21:47 |
no it is a breather for the box....dont plug it in anywhere...normaly runs up the filler tube and is cable tied to it hanging down a little like a candy cane.....the upshifting is controlled by the cable running out of the front side of the box.....just need to make sure it is adjusted right...
Pretty sure if you plug it into vacuum you will suck the box dry of fluid and will have lovely white clouds of smoke
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whoops... sorry dude, trying to tell you it's a vac modulator.
Been a while since I dirtied my hands on a VN...
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