What is the difference between the adjustable and non-adjustable thrust bushings?

 

^^^ Thank you Pwdrhound!

 

My understanding is that the adjustable versions allow you to adjust caster. I think price is about the same for solid vs adjustable. Hopefully pwdrhound will chime in as to a recommendation. I'm guessing non-adjustable should be fine for street unless your caster is off for some reason.

 

The adjustable bushing allow you to "clock" them and thus adjust caster. The adjustables are needed when using shimmable LCAs so that you can fine tune caster as you add shims. As you add shims in the front thus lengthening the LCA, your caster increases as the thrust arm is a fixed length (the wheel is pulled forward as you add shims). The adjustable bushing allow you to bring caster back in range.

The adjustable bushings are not necessary if you are using them in the rear. I like them regardless as they allow you to fine tune the centering of the wheel within the wheel well when running max size wheels and tires. For all intensive purposes however, the non-adjustable solid bushings are all that is necessary in the rear. Hope that helps...

 

You're welcome..

 

Much appreciated. If there really isnt a difference in price, might as well get the adjustable if I am going to go with a larger sidewall tire. Every mm counts. Its a good thing Im not married or Id be sleeping on the couch permanently for what I spend on this car...

 

Yes, every mm counts. I am in the process of fitting 26" tall 335 tires in the rear run at a very low ride height. It's very tight and having the adjustable pucks is handy as it allows me to pull the wheel assembly forward a few mm to give me some clearance in the rear.

 

Im not at 335s yet. Im looking to run 305/30/19 in the rear and I believe that is 26"

 

305/30/19s are easy. 12x9 et45 bolts right on with plenty of clearance. 12x9 et40 will need the fenders rolled. With soft springs you can't go crazy low due to it's large diameter or you'll rub at the top of the fender well on large dips. No a huge biggie..

 

Just noticed this tread. A BIG Congrats to you. Wow!

 

Just reporting back. Had RSS engine mounts and the Tarett LCA Monoball Bearing installed this week. Completely eliminated the Tank Slapper movement/issue. Rear of the car feels rock solid.

Some more NVH but nothing crazy and i'm just happy the car is back to handling properly.

Obviously the car was re-aligned as well after install so I can't definitively state if it was alignment, engine mounts, or the monoball's but one of the 3 cured it.

 

Good to hear. I have the lca monoballs along with rear toe arms and strut mounts ready to go in this weekend hoping to eliminate this same problem.

 

Can you please report on NVH afterwards? Really on the cusp of gathering up a bunch of parts for suspension work here

 

Sure thing, but a warning that my threshold for NVH is pretty high due to it being a pure pleasure vehicle for me. All the rawness just adds to the experience for me. However, I'll still be able to be honest about how much it increases.

 

After a few days I'd say the NVH is noticeably increased in the cabin. Not unbearable but I wouldn't want to take it on a 500 mile trip or something.