14 bolt info little help please

[brans87]

anything I should look for in the used one I got before putting it in the K5? It's 78 rear 3/4 14B FF and suppose to be rebuilt brakes and wheel cylinders. Guess need to check brakes and if good make sure adjust correctly once. Is there anything else I should look for or do while I have it on jack stands? New to world of 14B FF axle.

 

[dremu]

Make sure it really is a full floater (see the axle ID chart) and measure to ensure it really is 42.5" center-to-center spring perches (i.e. from a 3/4 ton; 1-tons are 40.5" ctr-ctr.) Ideally it'll be from a 4WD truck so the shock mounts are the same as your existing ones -- take a photo of yours and compare it.

While it's off might be a good time to sort out the parking brake cables, as you may have to mix and match parts to get it to work with your truck's cables and connections.

And hopefully you're aware you'll need an odd-sized ("conversion") U-joint, assuming you're swapping out the original 10- or 12- bolt rear for the 14BFF.

-- A

 

[brans87]

already got the u joint. I actually took it out of the truck and got u bolts and plates but know I should replace ubolts (DIY4X there). Any seals needed? Gears match what I already have for now. Know it's open where you can ad the locker easy with out buying it all. Anything else? Just measured and spot on center to center of spring perches 42.5

 

[Highpsi]

What size tires are going on this rig? Any lift? If so - you will need to address pinion angle / driveshaft selection.

 

[brans87]

Like to do the DIY4X flip in rear and either 3 inch leaf spring with zero rate or 4 inch spring in front from T/C. tires still debating have 265/70/17 for free for now with good tread on H2 wheels but thought about 315/70/17 and 35's but not 100% on tires yet.

 

[Highpsi]

Ok, I'm no expert but with just 4" of lift you may get away with the drive line angle being more extreme but it might generate more vibration etc..

There's lots of guys here that go that same route and don't go changing to a CV style drive shaft and change the pinion angle. If using the same (stock) drive shaft style, the pinion should still point straight forward, not upward at the transfer case.