1 piece driveshaft OBS

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08-09-2009, 06:47 AM
468Blazer

1 piece driveshaft OBS

Anyone converted there 2 piece driveshaft to a 1 piece on the OBS extended cab truck?
08-09-2009, 09:03 AM
RedHeartbeat

tried to do that but no driveshaft company would make me one, something about it flexing too much over 54" long.
08-09-2009, 02:31 PM
468Blazer

I appreciate it. I was just curious seems like it would be better with less to break.
Don't 99-up extended cab trucks have a 1 piece driveshaft? I thought I was under 1 one time and noticed that but may be wrong.
08-09-2009, 02:43 PM
RedHeartbeat

yes the do but they are about 5" aluminum tube and if you put any real power to them they like to twist in half.
08-09-2009, 09:03 PM
GasGuzzler

Usually only 4WD's have one piece shaft with EC, CC, or LB. 2WD generally had two piece unless RC.
08-10-2009, 06:57 AM
Sleaper

Quote:

Originally Posted by RedHeartbeat

yes the do but they are about 5" aluminum tube and if you put any real power to them they like to twist in half.

Are you trying to say that I don't make any real power??? I've got the 1 piece aluminum and from what I understand they do ok. The main problem with them is excessive speed. You probably won't be doing many 130+ mph runs with them. It does fine for my application since I'm not spraying off the line and not making any runs over 110. If I was, I would go with a 2 piece...:twocents:
08-10-2009, 07:50 AM
GasGuzzler

Speed yes but off the line can be trouble too. What are your short times? ^^
08-10-2009, 10:15 AM
468Blazer

how much hp rating would u say? would up to 500 hp be safe or less. My thought was if i start making more hp with a 2 piece i would see the center section exploding but I may be way off track.
08-10-2009, 12:05 PM
Sleaper

Quote:

Originally Posted by GasGuzzler

Speed yes but off the line can be trouble too. What are your short times? ^^

I have pulled a bunch of 1.83 60 ft.
08-10-2009, 10:35 PM
GasGuzzler

That's prolly safe then although pretty good.
08-10-2009, 10:52 PM
randomhero

He's right the biggest issue is going to be higher speed. It's ridiculous how fast the driveshaft is turning with 4.10 gears, converter locked, stock tires, and driving 80+ MPH.

There are several guys I know of who have thrown a driveshaft in their crew cabs(1 piece shaft) with just stock trucks on stock tuning.
08-10-2009, 11:11 PM
DBRODS

I have a 2 piece in a OBS and I'm putting close to 600rwhp to the ground and no issues here, and I've had the truck to 165+mph too..
08-10-2009, 11:11 PM
sprayedenali

i have a 1 piece and so far havent had any issues with it, but i know others have... i was a little worried about it when i was spraying a 150 shot off the line! from what i can figure that was over 700lbs of TQ and i bet they arent made to handle that
08-10-2009, 11:22 PM
AKlowriderZ71

I'm still rockin the one piece rear driveline too. The biggest issue is gonna be driveshaft speed, not torque/power. I snapped my trans output shaft, and the stock driveline(aluminum) lived. :burnrubb:
08-11-2009, 08:59 AM
468Blazer

so just like everything some have good luck and some have bad. My thought was getting a 1 piece may take the slight vibration i have from lowering it and be less joints to break if adding more power.
appreciate all the input
08-11-2009, 09:36 AM
Sleaper

Quote:

Originally Posted by 468Blazer

so just like everything some have good luck and some have bad. My thought was getting a 1 piece may take the slight vibration i have from lowering it and be less joints to break if adding more power.
appreciate all the input

Have you had it balanced? I would start there and also check your pinion angle...
08-11-2009, 01:00 PM
468Blazer

i havent had it blalanced or anything yet. When putting the drop on djm said there probaly would be a little vibration around 40-45 mph. Ive used the shims and all which it isnt bad id just like t get it even better if you know what i mean but yeah that would be my next step or getting a 1 piece.