408cui + 904 = Kaboom?

[Moparmal]

Id like to know if a 904 trans with kevlar bands and steel planetaries will stand up to a 408 making around 440 HP.

I understand its the torque that breaks them - but can the 904 be made to cope with the est. torque output of around 480 ft/lbs without breaking the bank?

What mods are recommended ?

 

[djwhog]

Yes it can, use also billet servo pistons, HD band apply strut, and at least a bolt in over running roller clutch. There are also better front pumps to use as well.

Talk to John at Cope racing he builds these things..

 

[AdamR]

Theres nothing you can do about the converter snout though. It will break eventually.

 

[Moparmal]

Thanks for the advice -

Adam I'm running a Continental 3500 stall, will I have snout problems or are they stronger?

 

[abodyjoe]

Built properly yes the 904 will be fine.

 

[w2360Duster]

Thanks for the advice -

Adam I'm running a Continental 3500 stall, will I have snout problems or are they stronger?

Well did you have the engine balanced properly?
Was the convertor balanced externally or internally? Something to look into...

 

[stroked 340]

Built right the 904 will perform just fine thats what i ran behind my 520 h.p. 416 launching with the wheels up ,its now behind my 360 taking serious abuse every trip to the track and after 3 seasons of abuse holding up...

 

[pettybludart]

Built right the 904 will perform just fine thats what i ran behind my 520 h.p. 416 launching with the wheels up ,its now behind my 360 taking serious abuse every trip to the track and after 3 seasons of abuse holding up...

Holy Stroked!After pounding behind 520hp,then the switcheroo?Still going strong?That,s what I like to hear!A well built 904!

 

[70aarcuda]

http://turboaction.com/technicaltips6.html

read tech tip on converter snout....

 

[ian]

you will need to fix your neck with a sleave ,and machine your pump for a bigger bush ,then f m v b thats all i have.