Solid Subframe Bushings

[Casa de Mesa]

Ha! Love it.

I'm rocking SS Race so unless you're running straight pipes... good luck!

[jet_dogg]

🤠🤠

[oceansize]

I'm probably one of the few who has had new oem, powerflex poly, and solid subframe (CMP) within a very short time span (a month or two). Solid subframe bushings are not a problem as far as NVH IMO and certainly makes the power being put down seemingly more direct on acceleration. I didn't like the power flex poly at all, more noise, squishy, etc. I do realize some are super super sensitive and if that is the case then buy a 76 Cadillac De Ville (I'm kidding, just stick with OEM bushings and move on).

[Tbonem3]

This thread is about diff, not subframe. That said, it seems solid sub with OE diff is the best compromise between comfort/nvh/performance/long-term health of racp

[oceansize]

This thread is about diff, not subframe.

Nope Read the title of this thread.

[Tbonem3]

Nope Read the title of this thread.

Pardon me. 75% of the posts ITT, and the direction of the thread now, are about diff 🙄

[Casa de Mesa]

I'm probably one of the few who has had new oem, powerflex poly, and solid subframe (CMP) within a very short time span (a month or two). Solid subframe bushings are not a problem as far as NVH IMO and certainly makes the power being put down seemingly more direct on acceleration. I didn't like the power flex poly at all, more noise, squishy, etc. I do realize some are super super sensitive and if that is the case then buy a 76 Cadillac De Ville (I'm kidding, just stick with OEM bushings and move on).

Land yachts for the win.

Yes on the solid subframe bushings. I had solid subframe + OEM diff bushing and it was super quiet. It wasn't until I switched to solid diff bushings too, that's when the banshee took up residence in my trunk.

This thread is about diff, not subframe.

I'm noticing a theme. You really don't like topics to veer off course much, huh?

What has been your experience with solid subframe, OE diff bushings?

EDIT: The OP was asking about diff bushings too, albeit, the combo of solid subframe +OE bushings. Regardless, I'd argue the conversation is still within spec here.

That said, it seems solid sub with OE diff is the best compromise between comfort/nvh/performance/long-term health of racp

Agree with this 100%.

[oceansize]

Solid diff bushings for the street are a pretty hard no regardless of the construction of other suspension items on the car and is one of the few things that almost everyone can agree on.

[old///MFanatic]

Sticking to the title of the thread.
I have solid subframe bushings (w/oem diff bushings). It’s a street car and it’s not bad. Suspension feels more reactive and precise in the rear. But it does add some NVH and I notice an ever slight diff thunk that wasn’t there. For most enthusiasts this is an acceptable trade-off for the gains. For some dedicated street cars they’d probably be happier with new fresh oem bushings.

[bjz!]

Tbf, bjz is notorious for those sort of comments. He calls people idiots if their experience/opinion doesn't line up with his. You notice a lot of those types of posts from enthusiasts- not willing to be honest about how mods have compromised the car or dismissing any negative because it doesn't "matter" to them. They rationalize it so as to support their original statement that "there is no added nvh" or whatever the claim is.

U are hilarious, soon to SNL.

[bjz!]

Sticking to the title of the thread.
I have solid subframe bushings (w/oem diff bushings). It’s a street car and it’s not bad. Suspension feels more reactive and precise in the rear. But it does add some NVH and I notice an ever slight diff thunk that wasn’t there. For most enthusiasts this is an acceptable trade-off for the gains. For some dedicated street cars they’d probably be happier with new fresh oem bushings.

For sure. Oem is better choice.

[Jake.s54]

Im on solid diff. Only sounds when speed is high, normal driving, nop.

This is a complete lie, I have personally had poly diff bushings, solid, and oe rubber. Solid diff bushings whine above 10 mph and are incredibly loud on the freeway. Do not get poly or solid diff bushings, you will regret it.

[Lavatoad]

I have solid subframe and poly diff, done as the same time as subframe reinforcement. Diff does wine at freeway speeds. Not too bad, but noticable. If I were to do it over, I'd go oem diff bushing

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[WestBankM4]

Hours and hours of research here on the boards and from members in person, I stayed with OEM Diff bushings. I did have my RACP reinforced with Turner plates and added CMP solid subframe bushings as well as the Vincebar. I think the combination of these three is peak for track/street.

[lvm3sm46]

WestBankM4 Same here, hours of reading about it I went with solid CMP subframe bushings, oem diff bushings, with Redish V3 plates that cover top and bottom. Car feels really solid and no noticeable whine or other noises.