46RH Intermediate/Output Shafts - Strength?

[GO 4LO]

Hi, guys,



Looking for a little advice on my first gen project. I bought a built 46RH trans for it awhile back to replace the stocker. It's got all the normal internal goodies, except billet shafts. At the time, I was only planning on going to the 500-550rwhp range, so I didn't think I'd need billet shafts.



I'm considering rebuilding the motor and going to a big twin setup now, and I was curious how much that trans should hold, if I drop a billet input and flexplate on it before installation? I'm sure the stock intermediate and stock output will be the weak links.



I do have a few things helping me. The truck is a light regular cab longbed (and I could go to fiberglass frontend and bedsides to help more). No lockup, so no locked-locked shifts. Loose converter, and my twins wouldn't start spooling until 24-2500 anyway, so I'd stay away from the low torque peak that busts a lot of trannies. I don't mind keeping it to sub-10psi launches if it will help the trans live with all the power, either.



What do you think? How much power should it hold? Would I be better off digging back into it now and replacing the intermediate with a billet shaft?



Chris

 

[cerberusiam]

Output shafts are tough to break on a RH trans. I wouldn't worry about it.



Input shaft is going to be an issue at those levels and a good TC. Non-lockup is going to help but there is a lot of TQ hitting the input so a billet would be a good idea.



Beef the clutch packs and kick the line pressure up and that should suffice.





I would question using a 46RH for that power level though. The case is a bit weak and when you start putting the power to it and hook it up there is a fair chance of breaking it. The lack of lockup is a killer on getting power to the groundplus there are many more,and I believe better, pieces for the later units. Cost is going to be an issue but if your gonna go big... ... .

 

[y-knot]

Chris,

I would sell the 46 and buy a 47 from any one of the more popular dealers.