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Trevor Tai
TryHard
NSW
Soarer GT-TL

Posts: 102
Reg: 07-2005

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Friday, September 08, 2006 - 11:13 am, by:  Trevor Tai (Quiksilva) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Has anyone had a look at this before?

What is the difference in driving experience between this mod and installing an MV shift kit?

http://www.lexusclub.co.uk/lsocautoboxmod.pdf

You thoughts people?
Benjamin Burgess
DieHard
NSW
Toyota Soarer GT-TL

Posts: 608
Reg: 07-2005

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Friday, September 08, 2006 - 12:01 pm, by:  Benjamin Burgess (Jampac) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yeah it'll modify the shift speed, but its not a shift kit like what MV do, but has some things the same. All his really doing for this mod is to increase the spring tension by shimming the spring so it shifts quicker and harder and increased the line pressure, again to make it shift harder. MV do this, but they do it correctly by modifying the valve body. The MV kits you replace the valve body as well as the springs with much higher spring rates.

I wouldn't know exactly how hard this mod would smash into gears, so unless you feel like stuffing around with the settings which I can tell you, pulling the valve body off is not a nice job seeing as you'll be covered in transmission oil, then could be best to just buy a known combo from MV autos that works, and has 3 stages to suit just about anyone.
Trevor Tai
TryHard
NSW
Soarer GT-TL

Posts: 103
Reg: 07-2005

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Friday, September 08, 2006 - 03:14 pm, by:  Trevor Tai (Quiksilva) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks for that Benjamin, very informative. Cheers!
Chris Davey
DieHard
QLD
Corona

Posts: 952
Reg: 07-2005

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Wednesday, September 27, 2006 - 01:38 pm, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I did this mod.

Don't know why but changes don't seem quicker or harder?

FIgured I may as well give it a go when I had to pull the auto out.

Now as I may be pulling the auto out again, I might get a built auto from MV.
Trevor Tai
TryHard
NSW
Soarer GT-TL

Posts: 106
Reg: 07-2005

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Wednesday, September 27, 2006 - 02:32 pm, by:  Trevor Tai (Quiksilva) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

chris,

was it still retarding the revs between gear changes? and when you put the pedal to the metal, was there still farting noises between changes?
Chris Davey
DieHard
QLD
Corona

Posts: 954
Reg: 07-2005

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Wednesday, September 27, 2006 - 02:37 pm, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I never had that issue as my auto is manualised via MV box and I run a microtech ecu.

From reports on
www.supraforums.com.au it does reduce the amount of time it farts for though. Didn't seem to do much for me though.
Trevor Tai
TryHard
NSW
Soarer GT-TL

Posts: 107
Reg: 07-2005

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Wednesday, September 27, 2006 - 02:48 pm, by:  Trevor Tai (Quiksilva) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

oh i see, all those mods would definitely have reduced the retarding somewhat. I guess the next step is to put in a shift kit.
Chris Davey
DieHard
QLD
Corona

Posts: 956
Reg: 07-2005

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Thursday, September 28, 2006 - 11:25 am, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

the retarding is the engine retarding so if you have an aftermarket ecu it won't do it at all. You could have the stock ecu controlling auto and it wouldn't fart anymore.

I just thought that maybe I didn't tighten the "kickdown" cable enough. I will check that and retest.
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 417
Reg: 07-2005

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Thursday, September 28, 2006 - 03:10 pm, by:  Anish Varsani (Yomama) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Tightening the "kick down" cable will increase the normal running pressure accross the entire valve body as the pressure regulator plunger will now always be partially depressed.

If you want even more pressure, you'll have to get a shift kit as these have the pressure increased inside the valve body by changing the regulator springs. Any experience auto transmission shop will be able to up the pressure.
Chris Davey
DieHard
QLD
Corona

Posts: 957
Reg: 07-2005

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Thursday, September 28, 2006 - 03:15 pm, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

THe thing is I have already upped the pressure on the valve body.

If this doesn't work then I will start saving for a fully built MV box.
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 419
Reg: 07-2005

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Friday, September 29, 2006 - 05:28 pm, by:  Anish Varsani (Yomama) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

You wouldn't happen to have a tute for how you upped the pressure? I want to increase mine even more as I've got slippage when gears initially change but not during normal running.

I've got a stage 1 MV kit at the moment.
Chris Davey
DieHard
QLD
Corona

Posts: 964
Reg: 07-2005

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Sunday, October 01, 2006 - 10:49 am, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

just followed the instructions in the first post here.
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 421
Reg: 07-2005

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Sunday, October 01, 2006 - 12:44 pm, by:  Anish Varsani (Yomama) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

No probs. I thought you had split the valve body in half and fiddled with the regulator spring inside.
Daniel Clarke
DieHard
NSW
TT 2.5L 6 cylinder

Posts: 683
Reg: 03-2006

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Friday, October 06, 2006 - 11:24 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Anish, if you have a shift kit and its slipping on gearchanges at WOT, it may be something a bit more than just line pressure:-(
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 422
Reg: 07-2005

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Saturday, October 07, 2006 - 11:07 am, by:  Anish Varsani (Yomama) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I thought as much. Just want to get as much life out of the box as it is before having it rebuilt. If it lasts long enough, I'll be able to afford a manual conversion.

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