Uprated differential bushings???

[SCguy]

My rear differential has been reinforced, but I'm running the stock rubber bushings. What type of improvement should I expected if I upgrade the differential bushings? What have you done? Suggestions? Racetorations sells cups to stiffen up the stock bushings without adding extra noise/vibration or then there's something like https://www.tr6car11.bravehost.com/Performance.html

 

[ROADSTR6]

I put the poly bushings in mine when I repaired and gusseted the mounts. I have had no problems with this setup and it doesn't seem any louder. I vote poly.

 

[4aNot4]

Rubber bushings, stock springs and rubber diff mounts all "absorb" a lot of shock that are otherwise transmitted by poly components and stiff springs straight through to the chassis, inducing flex and harshness. Take a ride sometime in an IRS TR that has been recently refurbished with all rubber components and stock springs/shocks. You might be surprised at how tight but comfortable the ride is...

 

[Guest]

Hey Larry,
I pulled all that newfangled poly stuff out of my car, I like the feel and comfort of rubber on my almost-60-year-old back.


Bill

 

[DougF]

My vote is for urethane. The rubber products available for almost all applications of reproduction parts in our cars tend to garbage at best. Some things seem to last a year, some a little more. But life expectancy is short.
Wherever possible, I eliminate rubber.