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T56 gearbox service

RyanDZ88

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Hi I have a 01 vx ss with a T56 manual 6 speed box with 213xxx and as far as i know its the original box.
This is the 1st manual ls1 i have owned all previous have been auto and want to treat it rite and give it a full service.
Was reading that dex 3 is the best is this true as I'm a lil sceptic about putting ATF in a manual?
For the most part it seems pretty straight forward
Release from bottom bolt
Fill to top bolt
Now what I'm not sure about is I seen mentioned that to get the full 4.4L in you have to remove revers sensor.
Is removing the sensor a easy job and where is it and how do I remove it to get the extra 400ml in?
Big Thanks in advance to any help
 

Tatiana

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Moved - the how to section is not for questions.
 

vr304

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These boxes normally have atf in them mate that’s how they come from factory but Penrite pro gear 70w75 is a far better oil to run in them it’s a light manual gearbox oil specifically for these gearboxes and to replace it just dump the old stuff and fill the whole lot thru the reverse sensor hole just need a ring spanner to remove it I forget what size
 

Smitty

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yup.. Penrite Pro is the only stuff that should go a Tremec box

had it in my VX SS, now have it in my HSV Clubbie
 
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