oldred95

I've been wondering the same thing and I've never seen one break either. Seen a handful of those flimsy big diameter aluminum ones cumple like an empty beer can though. All the two pieces shafts are steel right? I know on the OBS's they are, pretty heavy gauge steel too.

viciousknid

iTrader: (8)

i dunno if its steel or not, but it's still there.

and Enid is a MESS with that construction. I went to Lowes the other day and holy hell.

outlawz2004

iTrader: (18)

Yes, they are steel.Never had a problem with mine and its been up there a few times as well. Well over 120, havent had the gps hooked up to see what is top speed, but it pulls hard well past 120.

AdioSS

iTrader: (2)

I'm wondering because I was afraid to do a third gear dyno pull with my truck. I guess I don't need to worry about the driveshaft.

Tires might be a problem though. I've got 3.23s and 30.5" tires, so a pull to 6000 would mean roughly 170mph wheelspeed...

GMCtrk

iTrader: (27)

wait, I have a 2 pc. steel driveshaft, are you saying that it would be ok for me to do a 3rd gear dyno pull safely? When did GM stop using 2 piece steel driveshafts in favor of 1 piece alum.?

vanillagorilla

iTrader: (1)

I've been well over 100mph a bunch of times with 4.56's in 6th gear with the stock shaft. No vibes or issues.

TXsilverado

iTrader: (19)

theres no guarantees but its safer than doing it with an aluminum driveshaft IMO. ive seen way too many aluminum driveshafts twist in half. they are literally like a coke can

trxmxzx

iTrader: (7)

140 at 6100rpm on EFI live 2-piece and still burning rubber every chance i get turning 20's also!

dirt track racer 81

iTrader: (45)

130 and on several times..cheepo u joints too..no probs