I resently blew my driveshaft going about 115 mph in my 08 5.3 Silverado Crewcab.
I have heard that a way to prevent this is to have the Driveshaft high speed balenced. I have also been told to make a custom 2 piece unit.

I have minor mods and a Dyno tune.
I plan on putting a Turbo to have a little fun and to catch people off guard.


Any suggestions for my driveshaft?

 

2 peice driveshaft from dennysdriveshaft imo

 

I know the feeling. What else did it tear up?

 

Im curious to know the answer as well.

 

Actually no other damedge was found. The truck is still under powertrain warranty so the driveshaft was replaced.
The dealer never had seen it happen before. So they just replaced it.
I know it's because I was going past the factory speed limiter of 90 mph.
I 'am guessing GM knows there driveshafts don't like higher speeds, thats why they limit them at 90.
These trucks carry there weight very well, I' am guessing my truck should do 130 pretty easy.

 

What gears you got in it? That will affect top mph. Texas driveshaft specialists will do a direct replacement in 5" aluminum for around 450

 

Glad to hear you got it fixed. Yeah, I get mine up to 135 all the time doing highway pulls.

 

How well do they hold up? They are using a thicker wall tubing?

 

the stock is about .060 thick. Theirs is .125 they told me they got them behind big hp/tq diesels. I told them I need 6200rpm for being locked in 3rd and they told me no problem. Critical speed calculates out to 6400 or so

 

Lucky you. My local dealer declined my warranty on my FIRST shaft at 7500 miles. The last one I bought from chevy blew up under 100 mph. The third one I had built.