[kamielle]

What is the recipie to build a bullet proof 2004r transmission

[Jmark]

Nothing is bullet proof, especially an automatic! What is it going behind? Horse power, vehicle weight, gears, tire size?

You can get some ideas here.
Mark

[jakeshoe]

Check out CKPerformance.com

Chris builds a good 200-4R.

I have one I built for my 427 powered Chevelle. I just pulled it to replace with a 4L80-E.

My builds consist of;
Billet forward drum from CKPerformance
Superior or Sonnax Servo
Deep Pan
3 clutch Overdrive setup
Alto red clutches in the directs.
Dual fed direct drum
10 vane pump
.500 boost valve/.283 reverse
hardened sun shell and stator
and a valve body kit
I do a few other minor internal mods for lube, etc.

Only problem with a 200-4R is that you are much better off starting with one of the hard to find performance cores if you desire decent WOT shifting rpm.
Most of them shift around low 4000's rpm-wise without mods, and modding the governor is not so simple as on other GM units.