14b on a M1009 Issue

[Russm]

Putting a 4.5" rear lift on my 1009 with a 14b axle.
The bolts that hold the u joint strap are contacting the end of the driveshaft and preventing it from turning.
We are thinking we need to use shims to make the yoke point up a little to solve this issue.

I am wondering if anyone has any suggestions on how much the yoke needs to be pointed up?

 

[Recovry4x4]

Silly question here but is the 14B a new install? The ujoint looks wrong.

 

[73m819]

Jack up on one side of the frame so one rear wheel is off the ground, rotate the drive shaft so there is a gap at the bottom, pull the bolts, rotate again to get to the other bolts. This issue is not that uncommon in older cars and trucks.

 

[camoyj7]

I agree with Recovery. When I did my 14 bolt swap I had to use a crossover u joint.


http://www.4wheelparts.com/Drivetra....aspx?t_c=12&t_s=515&t_pt=3624&t_pn=D/S5-134X

 

[Chaski]

Silly question here but is the 14B a new install? The ujoint looks wrong.

I agree, the joint looks wrong. The 14 bolt has a 1350 series yoke. The other thing you can do for strength and clearance is toss the stock strap style yoke in the trash. Get a u-bolt style yoke (Dana style). The yoke and u-bolts cost about $100.00.
If you decide to go that route you will need an inch-pound torque wrench with a range from 0-40 inch pounds, an 1.5" socket, a big breaker bar and something homemade to hang onto the yoke. The job is kind of a pain, you must measure pinion preload before and after. If you go too far you must replace the crush sleeve.
All the info is in the TM. If you decide you want to go that route let me know and I can get some more info to you.

As far as the shims go, that is an unknown. You are going to need a protractor. Pinion angle on a 1009 is kinda fickle with a lift. Also depends if you used block / springs or shackle flip. Measure it and use your best judgment .

More info....
Series..cap to cap in inches..OD of bearing cap.
1310 3.219 1.062
1330 3.625 1.062
1350 3.625 1.188
1410 4.188 1.188
1480 4.188 1.375

1310 to 1350 = Spicer 5-460X

1310 to 1330 = Spicer 5-134X

1330 to 1350 = Spicer 5-648X

I am 99.9% sure you need a 1330 to 1350 joint (Spicer 5-648X). EDIT... Scratch that, the yoke on the 14 bolt is 1350 series for sure... I am unsure what the stock yoke on your driveshaft is. Sounds like the M1009's were 1310?

Below is a picture of a 1350 series u-bolt style yoke on my GMC. This is where I bought mine...
http://www.wfoconcepts.com/pr/1350-U-Bolt-Style-Yoke-14-Bolt/3210/3312/3324

 

[86m1028]

How about a pic from further back ?
How is the rear lift installed, almost looks like shims or springs are installed incorrectly.
Looks like the pinion needs to come up some.

I also agree the joint looks to be a 1310 & not the correct 1350.

 

[Recovry4x4]

Gang, I looked at the OPs other posts and came across this one.

http://www.steelsoldiers.com/showthread.php?137035-14bolt-Axle-Swap-into-M1009

At that time he felt that the 1350 joint was too big and went with the 1310/1330 combo joint. Obviously now with pics, we can see that the joint is wrong. I hope he revisits the 1350 size as I'm pretty sure it's the right joint.

 

[Russm]

Gang, I looked at the OPs other posts and came across this one.

http://www.steelsoldiers.com/showthread.php?137035-14bolt-Axle-Swap-into-M1009

At that time he felt that the 1350 joint was too big and went with the 1310/1330 combo joint. Obviously now with pics, we can see that the joint is wrong. I hope he revisits the 1350 size as I'm pretty sure it's the right joint.

The 1350 size u joint does not fit into the yoke, the end caps are too big. The 1310 u joint is too short between the end caps, although one of its caps fits into the yoke if you hold the u joint to one side. I believe I have a 1330. My original driveshaft + u-joint fits perfect into the yoke on the 14b. The 14b came from an '84 suburban supposedly, not sure of the submodel.

Rear lift is a shackle flip 4" with an Add-a-leaf installed to move the axle forward 1". Drive shaft was pulled out of the t-case a little much for my taste. At full suspension extension it may fall out without moving forward the axle. About 4.5" of lift total.

As for my original question: Found a similar Blazer today with a similar setup. He had a 6* shim on the rear axle. I will do that also, should solve my binding problem.

Truck is being worked on by a friend with a shop across town. I don't have quick access to it to snap pics.

 

[86m1028]

With a shackle flip, it already moves your axle forward.
Why did you also move it forward an inch with an add a leaf ?

 

[Russm]

With a shackle flip, it already moves your axle forward.
Why did you also move it forward an inch with an add a leaf ?

The drive shaft had another 1-2" or so of play before it popped out of the t-case

 

[86m1028]

I took a closer look at mine today
(4in shackle flip, 1in zero rate moved 1in BACK
& 2 & 1/2in lift springs (56in rear springs, m102.

With your shorter wheelbase & the flip, you should be moving the axle BACK, NOT forward.
Different driveshaft style & or a longer one might be needed.

 

[Recovry4x4]

Have problems been resolved? What was the outcome.