Rear 14 bolt axle position

[53chevy]

I installed an ord shackle flip and 4" lift springs from alcan on my rear end. Has anyone had the axle move foreward approx an inch or so? Any thoughts ? Thanks

 

[obijuank5]

Yes. Everyone has. Ord has something to scoot the axle back. You will need that and some new center pins.

 

[53chevy]

Im thinking ill use a zero rate to move it back. The angle of the spring to the axle seems odd to me. I wish i could figure out what shims i need but i dont have the drive train in yet.

 

[rampage]

The shackle flip not only rotates the pinion upwards but moves the axle forwards. This is because the front hanger is at a fixed position so when the rear hanger moves lower in an arc so does the fixed position of the spring pad on the axle …if that makes sense.

 

[53chevy]

What is an acceptable degree range to run a 14 bolt ?

 

[rampage]

Depends on what type of driveline you have.

 

[nvrenuf]

It's about the driveshaft operating angle and each yoke angle more that a number specific to a 14 bolt. The shim that works for a 14 bolt in a Blazer is different than one that works for a Blazer. You'll need to get an angle finder (phone app is easiest) and do some math to figure what you need. Look at High Angle Drivelines website for a diagram showing you what to do.

 

[53chevy]

Thanks guys

 

[53chevy]

Once i have the rear axle in place ill start installing my diy4x shock inboarding kit. Any suggestions on shock tab placement ?

 

[AV8TER]

With a shackle flip the axle will move forward like this.

But, at full compression it will be centered in the wheel well. This is with 35s. If you go with say 40s it may rub on the rear of the fender at full compression if you move the axle back. I chose to leave mine in the 'stock' position so its centered when compressed. Just food for thought.

 

[chulisohombre]

The axle flip as with lift springs move the axle forward a inch so the compression of the spring puts it in a good place not to rub. The bigger the tire the more it makes a difference. I also left mine for that reason. The angle of the driveshaft and output from the transfer case should be within 3 degrees of each other so you don’t get bad vibes. Sometimes it is fine and no correction is needed.

 

[53chevy]

I did measure the angle of my top spring plate and its at 24.5 degrees

 

[NorCal69]

I just went through this with Jess from High Angle last week on FB. Max that he wants to see a 14bff tilted up is 18 degrees. He feels above that, the pinion will start to starve for oil.