cumalong

I am having my tranny built with DTT parts. I am getting a TQ, VB/ accum, rebuild kit without billet shaft. I want to pull a 9k camper in mountains and run about 400hp. At what point to you spend alot more money for a billet shaft and flex plate

Thanks

JohnBer

I broke my input with a stock 160 and stock converter goofin around.
So when i rebuilt mine i ponied up for the billet shaft and triple disc converter. the few mods i have the power diff is incredible. I doubt i'm at 300 hp but the torque is unreal.
If you get a good converter that gets the power to the shaft i think the shaft is a must.

DodgenIt

I have billet input and flex plate from DTT and Im glad i have em even though im prob only around 350 hp. Also you'd prob only be lookin at around 900 for the two billet. Thats what i paid atleast. Not sure if i got a deal cause i bought the hole tranny and those were upgrade choices. Both are important so its hard to choose one or the other. If your lookin for 400 hp Id go with both just to be safe and have no worries about addin new mods down the road.

Fishin2Deep4U

I ran for a long time on the stock flexplate and stock shafts in my DTT over 500HP.

Some hold up, some don't.

Dave

madhat

I think that you'll be good with 4k if you're not beating on it. I broke my output when I hit about 550...

cumalong

So it was the output shaft that broke. WOW, even if I got a input, the output could break just as easy. Maybe I wll just go without billets. It seems if your going to do it you need a billet-input, output and flex plate. Nay, that is foolish money for just towing. That would be 1500 more, no thanks

Mike D

You'll be fine running stock shafts, just don't use a lock up switch.

hamilton71801

Or just use it wisely.

Fishin2Deep4U

There's more shafts broken by guys that tow and use exhaust brakes than just about any other segment.

To each their own, but I would always do a billet input if there was any worry. As the trans has to be torn down to replace it. The output shaft is easy by comparison to swap.

Dave

DodgenIt

fishin2deep's got it right. Input atleast. I did billet input and flex plate only cause i knew if i did break the output, It'd be the easiest to fix

65fury

No stock shaft is made equal, i made 6 passes at the drags and was just fine with my stock input, even pulled a 13.6sec 1/4 mile run. I dont remember the boost i launched at, but i launched HARD! almost scary hard but i wouldnt do it again.... to expensive to have to rebuild the whole trans twice

Jason

jcw74801

Just wonderin', what do you gain with a billet flex plate? I thought it was just there to engage the starter.

DodgenIt

You gain the ability to add more power. A stock flex plate can crack or shatter under too much torque.

Fishin2Deep4U

That's one of it's jobs. But it's real role is to provide a link from the crankshaft to the transmission. In doing so it is a flexible joint between the two.

We just rebuilt a guys trans, bone stock 12valve with lots of miles and his plate was cracking. So, we think of an upgraded flexplate as an insurance policy. Many guys run the stocker with no issues, some fail at stock power. It just depends.

I prefer the flatness of a billet or Reactor flexplate over a laminated plate. But that's just me.

Dave

kawi600

If youre building that trans I dould at the very least go with the billet input. The intermediate and output arent a problem until you start talking boosted launches and big torque.