ORP 022 - The 14 Bolt Episode

Welcome to the Off Road Podcast!!  I am your host Greg Bakken and joining me is my co host Jeff Bakken...This is the podcast for all things offroad.  Whether you're looking for Sunday jaunts on some fire roads or hard core rock crawling, we will cover it all. Episode 22!!!

Welcome back Jeff!!

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Main Topic: The 14 Bolt Episode

Why do I want a 14 bolt?

Being a full float axle, it of course has full floating (FF) wheel hubs and axle shafts.

The axle shaft does not support the weight of the vehicle, but merely transmits torque.  Because of the above - FF axle shafts are not subject to bending loads like semi float (SF) axles are and can therefore be made of harder materials making them capable of carrying greater torque loads.  If you should ever break a rear FF axle shaft, you will not loose the wheel too.If you need to change a FF rear axle, it is extremely easy and simple to do.The hubs run big, strong, common, reasonably cheap wheel bearings, races, and seals (14b Dana 60 and 70 bearings, front and rear, are all the same).

The wheel bearings are not pressed onto anything, if need be they can be removed and replaced with nothing more than a screwdriver and big hammer.

Gear strength - 10.5" ring gear, 1.750" 30 spline pinion, huge 2 piece carrier made of 8620 Heat treated alloy steel, extra pinion bearing support Shaft strength - 1.5' 30 spline full floating shafts.  Housing strength - massive cast iron center section, 3.25: x 0.5" tubes.  Comes in two widths - 63" and 67" wms-wms, easily converted from one to the other (shafts are common) Removable pinion support, unbolts from the rest of housing, makes for easier gear setup.  Diff housing has built-in threaded carrier pre-load adjusters, makes for easier gear setup.  Because the carrier is so large and strong, a "full" detroit locker fits in the stock housing, and is therefore easy to install without gear setup changes, and is much cheaper than other 1 ton FF lockers.  Pinion yokes commonly available for 1350 series u-joints.  Commonly came stock with 4.10 and 4.56 gears and Detroit Lockers.  Cheap and easy to find, buy, and build.  Easy to convert to disc brakes.  Easy to "shave" for 2" inch gain in clearance.  Pinion length shorter than other 1 ton ff rear axles (D60, D70), for improved driveshaft length and angles.  Large ID spindles.

Common spindle nut threads with Dana 60 front axle, meaning only one style of spindle nut and socket need be used/carried.

Where do I find the 14 bolt?

The 14 bolt is found in a huge number of GM 4x4 pickup trucks and vans, 3/4 and 1 ton, from the 70's right through until at least 2000.

How do I identify a 14 bolt?

It is most easily distinguished by its huge, uniquely shaped diff cover that is, of course, held on with 14 bolts.

It is also fairly easily distinguished from other 1 ton full-float rear axles by the removable pinion support.

14 Bolt Bible

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ORP 019 - Brake Time Feedback and Goals

Intro:  Welcome to the Off Road Podcast!!  I am your host Greg Bakken and joining me is my co host Jeff Bakken...This is the podcast for all things offroad.  Whether you're looking for Sunday jaunts on some fire roads or hard core rock crawling, we will cover it all. Episode 19!!!

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Listener Feedback:

Hi again Jeff and Greg,

I have a quick thank you and a couple of specific Toyota questions for you because I'd like to know and you asked for them.

First, thank you for addressing my question in episode 15.  Your answers, options and commentary gave me good perspective and sent me in the right direction for my Toyota.  I've decided to keep the 22R on my '84 Toyota for now and re-gear it for the larger tires and see how that goes.  I may end up going with 37" tires instead of 35" tires after hearing about your experiences and reading some on YotaTech forum about them working well with the 22RE.

You asked for more specific Toyota questions so I have a couple of those for you.

  1. A) I want to change out the brakes on my '84 Toyota pick-up.  I have stock disc fronts and drum rears.  I'm going to all disc brakes.  What do I need to take into account to find brakes that are not a pain to change out and are big enough to do the job?  I would prefer to over engineer them to allow for changes on the truck in the future.
  2. B) What is a good way to go to beef up the front axle and suspension on front and back? (including lift to allow for the big tires)?  I obviously need to lift it some, but I don't want to get into a situation where it wants to tip over easily.   And then specific recommendations for making the front axle bulletproof would be appreciated.

Thanks guys, Keep up the great work!

From the wilds of Wyoming,

Steve

Toyota Rear Disk Brake Economy Kit

TOYOTA 84-95 PICKUP REAR DISC BRAKES

Toyota Disc Brake Conversion (Lines, Rotors, Brackets)

Review: All Pro Off-Road Rear Disc Brake Conversion

Trail Gear

Hey guys,

You were talking about your TPMS system in the last show. Do you know if there's a way to re-calibrate the sensors for a higher pressure? I put Cooper tires on my truck that are 10 ply, and run at about 80PSI. I keep them filled properly, but then my dash light is always on. Any input you have is appreciated.

Also, my Nissan Titan has the hill descent braking system. It sounds cool to have but it's actually a pain in the a**. It simply downshifts for you, if you're riding the brake on a downhill. I think Nissan did it because they under-engineered the brakes for my 6,500lb. truck. It's a 2004, and they significantly upgraded the whole brake system after 2007.

Anyway, keep up the good work,

Freeman

Titan TPMS Trick?

Bakken brothers!

Great podcast your personality sells the show! I could totally see myself wrenching with you guys and hanging out. The great content and excellent producing skills is a bonus.

I was big into off roading as a high schooler but never had the funds. Just had a baby, moved to the burbs, and bought a CR-V.

I love that little monster. I call it the overlander, a bit tongue and cheek haha.

I slept in it while hunting this year and I am building an overlanding style sleeping platform for it in my graduate FEA Engineering class. I know the bumper story.

Any way I wanted to ask what your day jobs are. You talk about the crazy hours you work and the toys you buy. You can be general in your answer if you need to.

I always feel your career choice says a lot about you and I just want to fill in the blanks.

I have a chemistry background but work as an engineer making secure document printers like passports etc.

If you guys have overlanding experience I would love an episode on that!

Thanks

Andrew

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