Sparks_88

Greetings, I bought a 99 mustang GT two weeks ago and I want to start working on the suspension parts as all of them are pretty much dried out and cracked (Pic below). I plan to replace the ball joints, end links, inner & outer tie rod ends, sway bar bushings, and the rack & pinion bushings. Most of these I find are available with the polyurethane instead of the rubber bushing.

What are the advantage & disadvantages of polyurethane to the OEM rubber?

Also there is a popping sound when I am bringing the car to a stop and sometimes when I am stopped and turn the wheel, I know it could be one of the parts I am going to replace but any ideas of what else it could be that I didn't mention?

Thanks in advance.

jwog666

poly if u plan on keeping the car for the long haul, stock if u plan on owning it for 10-15 years and dumping it

Sparks_88

Thanks, I do plan on keeping it as a project car.

I ordered all the parts except for the sway bar bushings because I'm not sure of the size.
Does anyone know the stock size bushing for the 1999 gt?

UPRSharad

I think the popping comes from the stock strut mounts. You can fix that and gain some adjustability with these:

http://www.uprproducts.com/mustang-b...plates-94.html

Sandmanbjj

I recently bought the upr k member, caster camber plates, A arms, coil over kit and bump steer kit. I'm wondering if I should replace all the bushings as well.

MtnMustang

Polyurethane gets my vote.

Last longer, stiffer for better performance. Downside to poly is they squeak. I use a spray lubricant on the poly bushings on my Jeep and Mustang about once a year and no squeaking. The other downside is depending on what you are putting them on, it can be a PITA to press them in. Control Arms, Shocks and Swaybars.

Sandmanbjj

if I do them I'm going to do them all on the front of the car. does upr carry any power steering racks?

Sparks_88

Thanks for the info, the rack and pinion seem fine. I will try replacing the strut mount bushing like you recommended and see if that fixes it.

Could you let me know which spray lubricant you use one a year on the poly bushings?

UPRSharad

I'm sorry, we don't.


I use synthetic grease and none of my bushings squeak. It's just castrol synthetic grease from Advanced Auto.