Getrag 440/446 parts.

[RobBeck]

If the forks never break that is way cool And dont get me wrong, there definitely is no point in making something custom for something that rarely breaks... and even if it did break it would be easily replaceable for a marginal cost. I still think a billet aluminum fork would be a lot better suited to the occasion, but if the cast ones are trouble free then who cares. I dont know enough about this particular gearbox to really speculate all of its capabilities... but from the way it sounds it is terrific. I have never heard of it busting gears or clustershafts, etc... that could get pricey It really sounds to me that if you keep it well lubricated, keep you clutch adjusted properly, and make positive shifts that it will last you forever.

Rob

Originally Posted by Boostaddict

Actually, thats not quite it. All things being equal, the elastic modulus will determine the amount of "flex" before breaking. Nothing to do with forging at all. Forged alloys are typically very different than casting alloys (due to cost) so you can't compare apples to apples. A suitable forged alloy should always out perform a comparable cast alloy, depending on how it was subsequently heat treated (don't want to anneal it obviously, or you wouldn't used a forging material). Anyway, back to the 60k maintenance

Wayne

[Theo_VR4]

Broken 1/2 Shift Fork:

[RobBeck]

Theo... Thanks! Yes that shift fork would be easy to make out of billet. But from what I have been told they never break so its pointless to fabricate
The only broken component we should have trouble with in this trans is the synchros... if the fork doesnt break its usually will just eat a synchro. It is most lkely that a synchro will be replaced if a fork breaks anyhow so who cares. I think I may find that I could have a bad 3/4 shift fork when I pull mine apart I guess the forks really should never break provided good maintenance and shifts take place, but again it comes down to price and availability if they do take a shit. Anyone got pricing or availability on them yet?

Rob

Originally Posted by Theo_VR4

Broken 1/2 Shift Fork:

[devilmanVISA]

I can tell you first hand that shift forks break. I broke one and sent the chunks through the gears.

[RobBeck]

Ouch. What kind of damage was done from the fork debris going thru the gear?
Any idea on if we can replace these forks from CRS or Kormex and for how much?

Rob

Originally Posted by devilmanVISA

I can tell you first hand that shift forks break. I broke one and sent the chunks through the gears.

[Bret Brinkmann]

Theo_VR4 - That looks just like my broken 1/2 fork. If only the clutch wasn't draging my poor fork wouldn't have broken on me. Oh well. I needed an excuss to work on my car.

If you break a fork then you loose both gears. First AND second, third AND fourth, you get the idea. You may still be able to put the shifter into that spot but you won't have those gears. I was surprised the pieces of my fork didn't get cought up in my gears and take some thing out with them. I really dodged a bullet on that one. Last I heard neither CRS nor Kormex had any forks. Never hurts to check up on them though.

RobBeck - If you do end up needing a fork let me know. I have a buddy who is parting out an 18 spline transaxle.

[RobBeck]

Bret,
Dont kid yourself you can break a shift fork by missing a gear with an otherwise healthy trans and properly engaging clutch, especially when powershifting. It all has to do if you let out on the clutch before the trans is completely in gear while at WOT and how aggressive you are as a shifter (accidents will and do happen ). Of course if your clutch is dragging then the probability will go up, but that is not the only reason it could happen.

Also,
Pending on the degree of the break (the ones in the pic look very severe and this doesnt apply to them), you could still get into gear but only feel a synchro like grinding sensation. This maybe moreso when a part of the little rail on the shift fork breaks and/or cracks that rides in the hub assembly/slider. I broke one before on a T5 (wouldnt ya know it 4th gear) where I swore it was the synchro but low and behold it was a minor shift fork breakage upon disassembly. Of course I replaced the synchro anyway... but the fork obviously wasnt completely doing its job.

Time will tell if I need that 3/4 shift fork, I certainly hope I do not. I do know I heard no noises in the trans after it happened. Actually tho, if it did survive.. I will be really impressed. Also I have a 6 speed anyway, so I am not for sure they are the same part number.

Rob

Originally Posted by Bret Brinkmann

Theo_VR4 - That looks just like my broken 1/2 fork. If only the clutch wasn't draging my poor fork wouldn't have broken on me. Oh well. I needed an excuss to work on my car.

If you break a fork then you loose both gears. First AND second, third AND fourth, you get the idea. You may still be able to put the shifter into that spot but you won't have those gears. I was surprised the pieces of my fork didn't get cought up in my gears and take some thing out with them. I really dodged a bullet on that one. Last I heard neither CRS nor Kormex had any forks. Never hurts to check up on them though.

RobBeck - If you do end up needing a fork let me know. I have a buddy who is parting out an 18 spline transaxle.

[Theo_VR4]

Yeah I was lucky too that mine didn't tear anything else up with all the pieces that broke off. I drove it home in 3rd gear, clutched smelled pretty bad after that though!

[Bret Brinkmann]

Originally Posted by RobBeck

Bret,
Dont kid yourself you can break a shift fork by missing a gear with an otherwise healthy trans and properly engaging clutch, especially when powershifting. It all has to do if you let out on the clutch before the trans is completely in gear while at WOT...

Right, that is what I said on the other thread. No mis-shifts. When a shift fork on these transaxles goes they go with a "bang." (Sorry for the pun... )

The forks in the 5 and 6 speed transaxle are slightly different. Different enough to not be interchangeable anyway.

[Gatecrasher]

I've finally started to build my website into something a little more useful. You guys can check for diagram updates and news on parts availability at www.xtreme3s.net. Try to ignore the crappy design right now. It's very much a work in progress.