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Did best I could to get up there, have aux tank and dual exhaust in way.

Here’s a photo from under Bronco tonight, this looks all the way back to me 🤔, any other experiences folks? Does this look like 4H or 2H on a D20?

Let me ask this, is it possible to get shifter into a 4H position, but not engage 4H? I’ve tried to shift up to 2H from this position and it gets in this in between position, drives 10ft and kicks into neutral. Just assuming I’m getting caught between gears though, but thought I’d ask.

Worth adding I do have a 66 Bronco, but 302, and C4 auto dropped in… not sure if that affects how t shifter works. There is no lock on my shifter, just a wooden knob. It’s a Duff aftermarket shifter with lots of love on it.

Here’s a photo of it in 2H… definitely very little room to move shifter, but ok wear or signs of rubbing either… I will give the case another good try to see if I can even contact the metal. Otherwise something is broken and it’s driving in 2H in a 4H position… if I can contact metal them maybe...

Thanks! I saw this on another thread and can find 4H and 2H I think, plus neutral and 2H, what’s odd is my shifter doesn’t show 2H, nor do a lot of others, why is this? Do all Dana 20 shifters have 4 gear positions?

Yea, just a stick with a ball, an updated Duff shifter on it, although dated, but pretty sure a T-shift

I need some help… I seem unable to get my Bronco into 4H, it’s a 1965 mfg date as long as it wasn’t rebuilt by PO’s 🤷‍♂️, the guy I bought from didn’t know… I have D20 shifter as far back as I can, even going slow speeds, or back and forth in forward and reverse(rolling in neutral). I do have a...

That’s what I mean, should Heims rotate freely while driving, meanwhile the lock nuts are stiff. Correct?

Thanks! Rear pinion was worse, and had drive line vibration at 40mph, put in 6 degree leafspring shims and it went away entirely… the 50+mph vibration is much more subtle, and investigating today if it’s my Heim steer install, or the drive shaft as I’ve ruled out a bunch of other stuff now...

Thanks for this! Things you can’t know when you’re new… BTW, front pinion angle is approx 11 degrees (16 shaft, 85 yoke with digital protractor). Moves freely when spun by hand, and same when jacked up and axle full drooping… it gets closer of course, but spins freely by hand. So yes need to cut...

Thanks for input, super helpful to know… what was shocking to me was when I bought this thing it’s suspension was shot to crap, springs dropped badly, shocks, bushings cracked, ball joints crap, and alignment beyond crap, but it didn’t drive terrible… 😂, but the alignment numbers scared me a...

Yeah, rear pinion angle is 2 degrees, front hasn’t been worked on, it was already lifted when I bought it and like that… but with it disengaged mostly does it matter? Or even disengaged can cause congestion? I could just rip it off and go for a test drive I suppose. Obviously cutting the...

Here are front and rear pinion photos, 98% of driving is just the rear, my vibration is with front disengaged and hubs unlocked / free.

Are you saying it’s an old truck, just drive it and don’t worry about it? BTW, I put 6 degree leafspring shims in for pinion angle, because I measured angle before I started and has 8 degrees… and when remeasured came out perfectly.

My pinion angle is measured correctly per the tech article on here I hope 🤞 , I used a protractor to get angle off face of diff yoke, and then angle of driveshaft to the ground and then did the subtraction… I want to say driveshaft was 19.25 degrees, and face of yoke was right at 69… subtract...

The question then is can overtightening cause excessive steering wheel vibration.

Got it… that’s odd, Duff instruction videos say to lock out your Heims at opposite angles, so I did that intentionally, it’s to prevent the lock nuts from wanting to come loose while driving… you’re saying to center the Heims and tighten down lock nuts and see if it helps, correct?

Can I hijack this thread? My Bronco has steering wheel vibration/slight shimmy at 50+mph. On a brand new smooth road it feels pretty smooth though, but almost any other road it’s got a shimmy at 50+mph… I’m running front tires at 25psi, and rear at 30psi…. Been talking with DirtDonk, my Bronco...

Having same problem on my Bronco, similar updates with all new parts, you all are giving me ideas. BTW, Chiltons says Pitman arm nut to steering box is 170-230ft/lbs… is there a reason this site all says it’s around 150? I swapped my pitman arm and torqued to 200 ft/lbs. Did I do it wrong?