will 6cyl aussie 4 spd go on a 308?

[jimmyd17]

just a quick question... does anyone know if the aussie 4 speeds are interchangable between the 253/308's and the VB-VK 6 cylinders? im guessing its a different bell housing but could i get an aussie 4 speed from a 6cyl and put it behind a 308. my 308 already has an aussie 4 speed in it but its a bit broken. i guess my other question would be... if they do fit, is there any difference in strengths between the gearboxes?

thanks.

~ James

[figjamidhVK8t4]

m20 for 6's m21 for 8s

[SL/ENUT]

Also totaly different input shafts too.

[jimmyd17]

so an m20 wont fit behind a 308? whats the difference between the boxes?

[jimmyd17]

oh ok thanks SL/ENUT.. just not going to happen lol

[craigvk]

I thought aussie 4 speeds weren't strong enough like the Celeca boxes as well to go behind a 5 litre monster?

[Goon]

I'm sure i've seen a 4spd in a VH 8 once.. Though that could of been a 5spd.

[SL/ENUT]

My SL/E has a M21 from factory. Never had a rebuild and still going stong. I also have a mate that once raced a LH torry with 400HP at the flywheel. The M21 never ever failed either.

[craigvk]

My mate has a aussie 4 speed. Not sure if it's a M20 or 21, but I will ask him. How much should you expect to pay for a M21 box in good order?

[SL/ENUT]

Well i don't about over the Bass Strait prices but down here in tassie anything between $350-500 for M21, cheaper for M20. The M21 are getting harder to come by though

[figjamidhVK8t4]

I'm getting m20 everything from peddles down to tail shaft in good order for $350 from my local wreckers...supra boxes are prob best coz there the strongest where the aussie's are a cheaper but not as strong

[vkberlina]

Ok an M20 will go behind a V8 although a 6cyl one will need a different input shaft, bellhousing & clutch fork to be compatible.
The difference between an M20 & M21 was gear ratios the 6cyl M20 & V8 M20 have the same ratios, some of the early V8 boxes had wider 1st & second gear but they eventually were all the same.

All boxes use the same output shaft.

hope this clears things up.
cheers
Scott

[Ragnarok]

quickest way to tell the difference between the 6 cyl box and the V8 is to look at the input shaft. the 6 had one line and the 8 had 2 lines on it. If your in melb I have a M21 for a V8 with bellhousing, clutch, pressure plate, and flywheel just sitting in my garage.