HZ gearbox swap auto to manual

[Tunner Fun]

Hi all i have just bought myself my first 1 tunner its a HZ 308 tri-matic. I have a M20 sitting in the shed and would like to know how much is involved in putting the m20 in instead of the trimatic. I just need to know about clutch set up and also pedal arrangement. any help would be greatly appreciated.

[tonnergirl]

Is the M20 set up for a v8 or 6 cyclinder? Imput shaft lengths are different, boxes look the same

[Tunner Fun]

gday tonner girl, the m20 is a v8 one i pulled it out of a vk which had a 308 in front of it

[tonnergirl]

lol sorry for the silly question but i gotta ask one more... why? I nearly cried when i had to change my manual to an auto in my ute but now I LOVE IT!! ditch the M20 though and get a T350 or 400 auto

[Tunner Fun]

yeah was thinking that just depends on how far i want to go with the car and what i will be using it for. Autos are good for the strip where i reckon manuals are good for cruising and thats what i want to do so do i hi stall it and work the track or do manual it and cruise

[tonnergirl]

I just use mine to cruise and i thought there was only one box for cruisin - Manual.. but as i said above.. I sooo love my auto now. My hubby still does the wheelies and all the boy stuff and i just get in it and cruise.. no stress no hassel no gear changing haha (as much as i did like a manual knob to with )

There's been a bit of debt about boxes on here but my take is the M20 is bottom dog, then trimatic, then the T350's on..

[HK1837]

Check to see if the HZ has twin or single clutch pivot.

[Tunner Fun]

sorry mate not sure what you mean. The ute currently is fitted with a trau-matic and i have a M20 i would like to put into it

[ton-a-fun]

clutch depends on a few things such as hydraulic, cable or rat trap to get the pedals setup right youll just have to have a good look at a set on a car with the same clutch system and then you have to set the shifter up which can be a pain but once sorted is all good id put a supra 5 or ford t5

[HK1837]

Probably not important anyway as you have a V8. Only 6cyl needs the extra pivot hole for clutch pedal. So all you really need to make it easy for yourself are:

Late HZ or WB clutch pedal, manual brake pedal, cable support bracket, bolts and clutch cable;
Complete V8 4spd, cable bellhousing, clutch fork and shifter;
Clutch setup and flywheel;
Reverse switch wiring from a HQ-WB 4spd;
Shifter boot and metal seal ring;
The right speedo drive gear to suit your diff.
That's about it apart from drilling the cable hole in the firewall in the right spot. Just find a manual WB commercial and copy it. When you go to do it i'll send you a scan of how all the pedal setup fits.

[Tunner Fun]

cheers for that HK1837 i will hopefully be picking the ute up when im down from work next so i will take some pics and post them on here for you aswell. Then i can get started on fixing her up. Thanks again for the info. Ian

[HK1837]

I'd pull the M20 apart too and put a kit through it. This is when you normally find a buggered cluster or input shaft. You can rebuild it to anything you want anyway, but M20 is probably the best for a tonner if you intend to carry any weight or tow.

[tonnergirl]

Don't forget to do the remain seal while you've got it all apart.. don't ask me how i know this