Reply to thread

Message: [QUOTE="m j, post: 690904, member: 9848"] Charles, I was incorrect when i said it was a pointless discussion, as I did learn that no one here has done anything to a zf5 or zf6 to try and improve it. stuffing a big clutch in front of it and trying to force the synchros to do something they are absolutely not designed to do doesnt count as an improvement. is there anything in a zf5/6 that wasnt available in 1950s truck transmissions? I am not really all that interested in your comparison of a stock zf6 with synchros vs a $4000+ auto with a $900 controller and who knows how much the multidisc convertor runs. I am more interested in a modified manual trans vs your huge dollar auto. in a fair comparitive budget there looks to be about $4000 to throw at a ZF but so far I cannot find anyone that has done it. first thing that has to go in a performance manual transmission is the synchros as they do nothing but hamper shifting (you have learned that yourself apparently), so facetooth the sliders to fix that the same way every racing manual transmission is set up (and every motorcycle I have ever seen).. once the synchros are out of the way you will probably not use the clutch to shift. friction and heat buildup in a manual on the gears that are not transmitting any power is going to be pretty low. they only have to deal with the drag of the bearings they are riding on. you have torque traveling through the head set and the speed gear of the engaged ratio, except in direct where the input and output are coupled and no load travels through the headset (which is why they recommend that gear for pulling rather then OD, OD being the worst scenario for heat) your 4r100 planetaries have up to 6 planets spinning between a sun and ring gear on each of its planetary sets. is there three planetaries in it or 2? either way its a lot more mass that has to be accelerated on each shift then in any manual, as well as a ton more gear contact area (one of the reasons planetaries are so strong) bring your allison to this [url]https://www.youtube.com/watch?v=DCo5uX8a1hs[/url] [/QUOTE]