Pinion angle

[tcpfl]

Hi all...

I'm considering changing out my springs and shocks to ome heavy duty (779 front, 763 rear springs and n107 front, n108 rear shocks) on my 2004 d2. I'm told this will lift the truck approximately 2 inches. Has anyone had any problems with drive line vibration or premature failure of u-joints due to the increased pinion angle?

[Disco Mike]

Are you planning on having a winch and front bumper, if so I would suggest the 751 front coils. As for the rear, unless you plan on always carrying a heavy rear load, I would stay away from the 763's and use the 762 rear coils.
You will not need to do any drive line work other then replacing the 2 front u-joints on the front drive shaft if they don't have grease fittings. You can get the shaft rebuilt for around $150.
As for brake lines, ABS lines and drive shaft angles you will be fine as long as you stay under 3"s.
Hope this helps,
Mike

[tcpfl]

Originally Posted by Disco Mike

Are you planning on having a winch and front bumper, if so I would suggest the 751 front coils. As for the rear, unless you plan on always carrying a heavy rear load, I would stay away from the 763's and use the 762 rear coils.
You will not need to do any drive line work other then replacing the 2 front u-joints on the front drive shaft if they don't have grease fittings. You can get the shaft rebuilt for around $150.
As for brake lines, ABS lines and drive shaft angles you will be fine as long as you stay under 3"s.
Hope this helps,
Mike

Hey Mike...

No plans for a bumper and winch but, I do carry at least 500+ pounds of tools and construction equipment daily. Taking out the rear seats made lots more room back there! The problem is that with the extra weight the truck has a mushy/spongy feel to it.

Thanks for your help...

[DiscoAmigo]

Originally Posted by tcpfl

Hi all...

I'm considering changing out my springs and shocks to ome heavy duty (779 front, 763 rear springs and n107 front, n108 rear shocks) on my 2004 d2. I'm told this will lift the truck approximately 2 inches. Has anyone had any problems with drive line vibration or premature failure of u-joints due to the increased pinion angle?

I've got that exact set-up with no problems what-so-ever with the exception of a very slight vibration from the rotoflex coupling. Firm ride, but comfortable. And it will carry a heavy load without any issues. I load my truck with bags of sand, rock, cement, ect.

[Disco Mike]

Tom,
Now I understand why you want the 763's makes good since.

DiscoAmigo,
If you are still on the original rotoflex, just put a new one in cause yours is starting to fail, only takes 15 minutes to replace and the vibration is gone.

Mike

[tcpfl]

Originally Posted by DiscoAmigo

I've got that exact set-up with no problems what-so-ever with the exception of a very slight vibration from the rotoflex coupling. Firm ride, but comfortable. And it will carry a heavy load without any issues. I load my truck with bags of sand, rock, cement, ect.

Hey DiscoAmigo...

That's what I wanted to hear. The heaviest load I've dared so far has been 18 - 80 lb bags of concrete (1440 lbs). Sagged her down pretty bad.
Just placed my order with Atlantic British with a delivery ETA at the end of the week.
Should make a nice weekend project.

[tcpfl]

Originally Posted by Disco Mike

Tom,
Now I understand why you want the 763's makes good since.

DiscoAmigo,
If you are still on the original rotoflex, just put a new one in cause yours is starting to fail, only takes 15 minutes to replace and the vibration is gone.

Mike

Hey Mike...

Is there a better aftermarket rotoflex available or are we stuck with orginal equipment parts?

[Disco Mike]

The factory rotoflex lasts alot longer then most of the after market ones. Go to Rover Connection and buy the factory one there, it is about $30 less then at the dealers.
With my 3" lift, I got about 82,000 mile out of my first one before it started to vibrate.
Mike

[tcpfl]

Originally Posted by Disco Mike

The factory rotoflex lasts alot longer then most of the after market ones. Go to Rover Connection and buy the factory one there, it is about $30 less then at the dealers.
With my 3" lift, I got about 82,000 mile out of my first one before it started to vibrate.
Mike

Thanks Mike...

I've only got 19000 on my 2004 so far. Guess I've got a few more miles to go before I need to change it. BTW, my front u-joints have grease fittings except for the slip joint. It's got a small plug in place of a grease fitting. I'm going to replace the plug with a fitting and load it up with grease.

[p76rangie]

Originally Posted by tcpfl

BTW, my front u-joints have grease fittings except for the slip joint.

Greasable ones can fail as quickly as standard ones. So don't ignore any viabrations from the drive-line as they can cause some expensive damage.

[tcpfl]

Originally Posted by p76rangie

Greasable ones can fail as quickly as standard ones. So don't ignore any viabrations from the drive-line as they can cause some expensive damage.

Sound advice... When I get the new springs and shocks installed I'll be paying special attention for any sign of driveline vibrations.