Slight Vibe at 25....

Since I've installed my OME lift (2" 2886 springs / UCA / HD leaf pack / Nitro shocks), and put in my ECGS bushing... all is smooth and good, except..... between 25 and 26 MPH, i get a slight vibration (less than rumble strips, but you can feel it).... once i hit 27 MPH, it's gone.

So, 0-24, nothing, 25 and 26 MPH - slight vibe, and 27+ MPH all smooth again.

I've tested this over and over again and it's literally only at 25 and 26 MPH...and that's it! lol. ???

Thoughts?

 

don't drive 25-26

 

Any drive line angle corrections done in the rear? Carrier bearing drop or pinion shims?

 

The shop that installed the lift, did an alignment (which i assume would be front and rear, but can't say honestly if rear was done) - drive shaft spacer (carrier bearing) was added - was a part of the kit, but no pinion shims... not sure i heard that was needed.

 

grease your u-joints?

 

could be on the cusp of needing pinion shims. I would almost hesitate to change anything as you may start chasing more vibrations. If the vibration feels like it is coming from the rear I would measure the all the u-joint angles and look for any anomalies. There is a huge thread about u-joint angles and vibrations on here

 

https://www.tacomaworld.com/threads/just-fixed-driveline-vibration-for-free.153050/

 

I do - every oil change I grease…

 

Maybe take it back to the shop that did it. Could also be tire balance.