zf auto needs to be stronger????

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6th January 2012, 08:42 PM
Blknight.aus

upping the line pressure can be done a few ways.. Im pretty sure that the electronic ones can have their pressures raised by means of electronic control intervention and the mechanical ones, if its anything like the traumatics can have it done by drilling out a couple of gallery restrictions to increase flow rate and if you really want to up the pressure changing the spring on the relief valve.
8th January 2012, 06:29 PM
George130

Quote:

Originally Posted by tebone

I have overhauled mine own zf 22 approx $450 with all new steel,friction plates, orings and gaskets. The trouble is no one will tell you there secrets. I put in extra friction and steel plates in each clutch packs to reduce clearances (stock standard approx 1-1/2mm play in each pack you want to get it to .2-.3mm).
I think the b/c clutch pack in the zf24hp is slightly bigger than the zf22. Also they use different sprags and slightly modify to fit this tranny. The area where no one tells you about is the valve body. Currently all the zf22 all change into the next clutch pack to slowly which makes all your steel/frictions plates slip which they wear out quicker. There is a mod they can do to increase oil pressure to the clutch packs to snap the plates in quicker but it will cost$$$ but doesn't take them long to do.

The zf is ok but with a heavy car, good hp or towing big loads don't invest in this box. Look at other boxes it will be cheaper in the long run.

PS. I not sure why you would put a hi stall in for street work.
But saying that I have heaps of torque to get off the line quick so thats why I went to low stall.
By the way I haven't got my GM box over 87degrees yet even with a could thrashing which I ran a large plate fin cooler not a tube cooler.

Regards Paul

The TC was in it when I bought it. Was almost impossible to drive due to notheng then bang you are a couple of car lengths ahead of everything.
It already has uprated springs and yes as you said extra in the clutch pack as is frixtion material and plates. I'm running a 10 inch flate plate cooler but it is half behind the bull bar so I also have a 10 inch fan to suck the air in. when you get it right it will run below operating temps but get it wrong and you can add 10 to 20 deg in seconds.
I would love the $$$ to put a different box in.
9th January 2012, 10:41 PM
cal415

200kw sounds reasonable :) i cant wait till i can get mine on a dyno, it should have around 450hp at the flywheel apparently, but i have a GQ 5 speed mated up to it so its clutches i will fry, better then frying a ZF cost wise i guess!

Tebone, any pics of the adapter etc you have setup? i want to do a T700 to LT230 myself, there are a few places i have heard of that do it but havnt had much luck getting any details.
10th January 2012, 06:52 AM
tebone

Quote:

Originally Posted by cal415

200kw sounds reasonable :) i cant wait till i can get mine on a dyno, it should have around 450hp at the flywheel apparently, but i have a GQ 5 speed mated up to it so its clutches i will fry, better then frying a ZF cost wise i guess!

Tebone, any pics of the adapter etc you have setup? i want to do a T700 to LT230 myself, there are a few places i have heard of that do it but havnt had much luck getting any details.

Hey Cal415, Send me a PM with your email address I got a couple of photo's with it in the car but it doesn't give much detail.

regards Paul

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