Steeda Differential Bushing Insert and Subframe Alignment and Support Kit

[vdngo]

Hey all... anyone install either of these mods? What was your experience with the install and performance? The website says that the Differential Bushing Insert System would increase NVH, which I really want to avoid, but how noticeable is it, especially for a vert?

Steeda 555 4443 Mustang GT/EcoBoost/V6 Adjustable Differential Bushing Insert System - Urethane (15-22)

Steeda 555 4450 Mustang Subframe Alignment and Support kit (15-22)

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[jacknifetoaswan]

I have both of them, and they're definitely worth it, but you're going to need an alignment. I'd also invest in the subframe braces and the subframe bushing supports. All this stuff is engineered to work separately, but it shines when they're added as a group.

https://www.steeda.com/steeda-s550-mustang-irs-sub-frame-bushing-support-system-2015-555-4437.html
https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

I have all this stuff, plus the vertical links (I have the adjustable toe links ready to go on the car), and it makes the back end super planted.

JR

 

[KingKona]

I have both of them, and they're definitely worth it, but you're going to need an alignment. I'd also invest in the subframe braces and the subframe bushing supports. All this stuff is engineered to work separately, but it shines when they're added as a group.

https://www.steeda.com/steeda-s550-mustang-irs-sub-frame-bushing-support-system-2015-555-4437.html
https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

I have all this stuff, plus the vertical links (I have the adjustable toe links ready to go on the car), and it makes the back end super planted.

JR

NVH????

 

[jacknifetoaswan]

NVH????

I can't comment on NVH for a convertible, as I have a fastback GT, but I didn't notice much, if any. I did add these parts in stages - 1) subframe braces, subframe support bushing braces, and bushing locating dowels; 2) vertical links; 3) differential bushings. Perhaps there was a little extra NVH, but it wasn't noticeable over the sound of my exhaust and road noise from tires.

JR

 

[drive_55_not]

NVH????

Minimal when I installed these on my 2018.

./

 

[vdngo]

I can't comment on NVH for a convertible, as I have a fastback GT, but I didn't notice much, if any. I did add these parts in stages - 1) subframe braces, subframe support bushing braces, and bushing locating dowels; 2) vertical links; 3) differential bushings. Perhaps there was a little extra NVH, but it wasn't noticeable over the sound of my exhaust and road noise from tires.

JR

I've got the vertical links already, so good there, the subframe braces aren't compatible with the vert with the existing brace. Good to hear about the minimal NVH. I have the Borla cat-back, so assumed that might help with some of the noise. I've got an alignment schedule too.

Did you also do Steeda for the bushing locating dowels and differential bushing?

 

[jacknifetoaswan]

I've got the vertical links already, so good there, the subframe braces aren't compatible with the vert with the existing brace. Good to hear about the minimal NVH. I have the Borla cat-back, so assumed that might help with some of the noise. I've got an alignment schedule too.

Did you also do Steeda for the bushing locating dowels and differential bushing?

Yes, the dowels were part of the Stop the Hop kit that I purchased initially. I bought the diff bushings, vertical links, and toe links from Mustang6G, and added them later in the process.

JR

 

[Vicr]

I have an EB and have installed the parts the OP listed as well as other chassis mods and yes there will be an increase in NVH ( noise, vibration and harshness). In my case the NVH is only at certain speeds/rpms. The GT's of course have a louder exhaust than an EB so the NVH is more noticeable, I can't comment on a vert. Once I turn on my stereo I can drown out the NVH. In conversations here as well as other Mustang forums it has been determined the NVH is mostly caused by the differential bushings. I have the black bushings and have not tried the red bushings but my car is not a daily driver and I wanted stiff chassis and suspension for spirited driving and track use.

 

[Excelerater]

best thing you can add to your rear set up are those poly bushings
I opted for another brand on the subframe kit which I thought was better and did not need an alignment after because it was self centering
NVH,hard to tell my car has headers and so much other stuff

 

[vdngo]

Thanks guys... pulled the trigger on the alignment kit, bushing support, differential bushings, and add the rear toe links for good measure

 

[NGOT8R]

Thanks guys... pulled the trigger on the alignment kit, bushing support, differential bushings, and add the rear toe links for good measure

That’s money well spent. The only other thing I would suggest would be adding their through bolt kit with your differential bushing kit.

 

[vdngo]

That’s money well spent. The only other thing I would suggest would be adding their through bolt kit with your differential bushing kit.

This one?

https://www.steeda.com/s550-diff-bu...rade-kit.html#/filter:ss_ymm:Mustang$253E2019

 

[NGOT8R]

This one?

https://www.steeda.com/s550-diff-bu...rade-kit.html#/filter:ss_ymm:Mustang$253E2019

No, this one.

https://www.steeda.com/steeda-555-4051-s550-differential-bolt-upgrade-kit

 

[NGOT8R]

See how it goes all the way through here.

 

[vdngo]

See how it goes all the way through here.

I’m intrigued now… looks like it makes sense if I’m going to do the other mods. Quick question, did you lubricate the threads, but the original bolt instructions say to use thread lock, seems to be contradictory.

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