GM Muscle

iTrader: (9)

I'm collecting parts for my transmission build and I was wondering if I really need the 5 pinion planetaries. Has anybody ever broke the stock 4 pinion set up? The tranny will have to hold about 550-600rwhp.

Thanks,
Andrew

jxaxsxoxn

iTrader: (2)

I've had several talks to a guy who works for Hughes.
He says he finds broken 5 pinion planetaries a lot. He's never seen a broken four pinion. He's seen four pinions worn so bad they did fail, but the five pinions just break.

GM Muscle

iTrader: (9)

Well maybe I should just run the 4 pinion and see what happens. I supose that I'd rather have them wear out than break.

Tom's_03SVT

Ive seen broken 4 pinions. its worth the $$$ to get the 5 pinion. the front one is for your overdrive the rear for the other gears, the rear one i would get for sure.

Tom

Rock-On

iTrader: (-2)

We put 703 hp /775 ft lbs tq through 4 pinion planets, your looking for 550-600hp, hope this helps Dave

john kilgore

to set the record straight, the front planet is first gear, the rear is od and comes on to over drive first to make second. that is why the rear planet gets beat up, it is overdriving 3.06 times the engine torque to make 1.62 second. l hope that is helpful

GM Muscle

iTrader: (9)

So since this is a budget build. If I where to do one planetary it should be the rear? Also, is everybody using an aftermarket 5 pinion or is it just a stock 4L65 piece?