My 4.7L 2001 SLT 4x4 Durango's rear sway bar bushings are in need of replacement. I measured the bar diameter at 3/4" - which translates to ~19mm. Checked online for a pair of Moog bushings and they have either 18mm or 20mm sizes listed. Checked at the local O'Reilly's auto and they list the same sizes. So, which size do I need? Seems the 18mm would make for a nice tight fit, but wouldn't make it all the way around the bar. Or do I use the 20mm size and the bushing mount tightens around them snugging them in place? A bit perplexed by the size discrepancy.

Thanks,
Dave

PS: Would it be worthwhile to replace the entire rear sway bar with a 7/8" Hellwig unit instead? I put Bilstein front shocks on about 2 weeks ago (replaced some CRAPPY Monroe's that I think were the wrong size to begin with). Liked the Bilstein's so much I'm replacing the rears with a set as well (they're due to arrive in 2 days). Looking to improve the overall handling and cornering ability over stock.

 

Since you measured the bar yourself, I'm not surprised it's not matching perfectly. I believe the 18mm would be too small, and if I remember correctly I think the 20mm is standard for your year and option.

Stabilizer bars can be tricky. First rule of thumb...if you change the rear to a larger unit you need to change the front to a larger unit. Changing just one will drastically change things...possibly for the worse.

Second, too much stabilizer can actually cause unsafe handling if other changes aren't made. Trial and error has it's draw backs but it's better than doing it blind and going around a fast corner and ending up in a ditch.

 

Thank you very much!!! I really appreciate the info. and will go with the 20mm Moog's.
Dave