Ignition Issue

[DirtDonk]

Don’t know if we’ve already talked about this, and maybe you should start another thread just in case, but what transmission do you have and what suspension do you have?
Reason I ask, is sometimes a too low pinion angle will result in a slight driveline vibration upon deceleration.
This vibration is transmitted up through the driveshaft to the gear boxes, and makes it sound like it’s coming from a transmission or a transfer case.
Not very common with the stock three speed, and possibly not as common with an automatic. But very common with the later five speed manuals.
And was anything else changed while you had the gearbox off? Such as a different weight oil maybe?
Or a different oil level?

 

[Tuck73]

Don’t know if we’ve already talked about this, and maybe you should start another thread just in case, but what transmission do you have and what suspension do you have?
Reason I ask, is sometimes a too low pinion angle will result in a slight driveline vibration upon deceleration.
This vibration is transmitted up through the driveshaft to the gear boxes, and makes it sound like it’s coming from a transmission or a transfer case.
Not very common with the stock three speed, and possibly not as common with an automatic. But very common with the later five speed manuals.
And was anything else changed while you had the gearbox off? Such as a different weight oil maybe?
Or a different oil level?

No changes to oil or oil level. I’m running an AX15 transmission with the conversion kit from Wild Horses. No lift kit and no body lift.

I will check the tightness, etc. of the drive shafts. Never thought about that.

 

[DirtDonk]

AX15? Then absolutely positively check your rear driveshaft!
Check the condition of the new joints and replace them if needed. Check the tightness of the U bolts too. If they’re original, they’re probably not loose. But if they’ve been replaced, and not retorqued, they may have loosened up.
Did you install a new driveshaft with this transmission? I’m guessing you needed a shorter one in the back at a longer one in the front.
Is that the case?

And as a sidebar, are you running bare metal floors at this point? If so, and you don’t have any sound insulation, you may be hearing normal noises.
These modern transmissions can be far noisier than the old car three speeds were. Just too many whirly bits spinning around inside.
You don’t hear it in their original applications because modern cars also have 400 pounds and 6 inches of sound deadening applied to them!
Ok, maybe that’s an exaggerated amount. But things have come a long way in the quiet department since our Broncos were born.