Custom Tune

MHeffe · March 5, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

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d3athsong · March 5, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

That sounds a little bizarre. Why would your driveshaft snap if your going a certain speed? Maybe if your doing 10 mph in reality but your tires are moving 100 mph on ice and you hit dry pavement?

jhm · March 5, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

Anything can break but I would be way more concerned about U joints. Dshaft falling out at that speed could turn you into a beef kebob.

MHeffe · March 5, 2008

Yea souds odd to me too but he told me that it has happened a few times.

Silverado4x4 · March 5, 2008

No way it will snap, now if you have like a 800 HP and 1000 torque and pull a big hole shot yeah it will twist and snap a U joint. Sounds like he is try to get more money out of ya. Speed has nothing to do with snaping a drive shaft.

VMax2007 · March 5, 2008

No way it will snap, now if you have like a 800 HP and 1000 torque and pull a big hole shot yeah it will twist and snap a U joint. Sounds like he is try to get more money out of ya. Speed has nothing to do with snaping a drive shaft.

Unless it is out of balance.

ws6_guy · March 5, 2008

The only way I see snapping the driveshaft would be if you were romping on the throttle alot, or towing more than you can handle, or if rust rots away the yolk area.

& I would imagine a 1 piece driveshaft would be much better than a 2 piece

LF Motorsports · March 5, 2008

On what Vmax said. the amplitude of vibration the u-joints will see is a function of speed and balance of the shaft. With a longer driveshaft, the could have "potential" for more unbalance. Bottom line, how often are you going to go 100 mph and for how long????

Are the new drive-shafts aluminum? Again, vibration and balance would be the cause. But I guess the area where the aluminum-steel yoke meet, could loosen up.

Anyway, 100 mph, how often.

slimjim2525 · March 6, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

The people who did your tune are completely FOS.

NHolds · March 6, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

The people who did your tune are completely FOS.

Was going to say the same thing.... whether you go 100 with or without a tune makes no difference. 100 mph is 100 mph. Second, you won't get enough power increase from a tune to affect it anyway.

tobias · March 6, 2008

I've yet to even try to hit 100mph but if your drive shaft is that out of balance, you should already be feeling some effects at 65-70mph. The vibrations, etc. should increase exponentially with speed but they'd certainly be present at those speeds too if there truly were a problem.

Your drive shaft has no idea whether your vehicle has been "tuned" and will not be affected differently by one. I understand there is a speed limiter on these trucks but again, if you can hit 95 and aren't feeling the truck shaking like a mofo and ready to fall apart, hitting 100 isn't going to be any different.

Maybe the guy who told you that just wasn't very clear about the point he was trying to get across.

Daddy

Mikeee · March 6, 2008

When I got my custom tune they told me to beware of my drive shaft that if I go over 100mph that the shaft can snap and that I would be better of replacing it with a 03-99 two piece drive shaft. He said that it was due to the fact that my truck is and extended cab. Has anyone ever heard of this?

Maybe their lawyers make them say that because one person had a problem and that became a bigger problem.

Mikeee · March 6, 2008

The only way I see snapping the driveshaft would be if you were romping on the throttle alot, or towing more than you can handle, or if rust rots away the yolk area.

& I would imagine a 1 piece driveshaft would be much better than a 2 piece

Doesn't a 2 piece have a center support? 3 points of support.

Less rotating mass than one looooong tube that will amplify any im-balance.

MHeffe · March 6, 2008

On what Vmax said. the amplitude of vibration the u-joints will see is a function of speed and balance of the shaft. With a longer driveshaft, the could have "potential" for more unbalance. Bottom line, how often are you going to go 100 mph and for how long????

Are the new drive-shafts aluminum? Again, vibration and balance would be the cause. But I guess the area where the aluminum-steel yoke meet, could loosen up.

Anyway, 100 mph, how often.

Yea what I think he meant was that if you go over 100 that they do get out of balance and then it all goes to S***. I don’t think I will be doing over 100 very much but it is still a worry. And yea the drive shaft is aluminum.