93celicaconv
Member
I think I've given up hope of ever finding Toyota OEM natural rubber bushings for the rear subframe on an ST185:
- 52271-20010: Qty. 4: Cushion, Rear Suspension Member Body Mounting
- 52281-20010: Qty. 2: Cushion, Differential Support Member
These OEM natural rubber bushings were supplied with a hardness factor of Shore A 60 (60 ShA).
GT4 Racing makes ST185 rear subframe bushings in poly. There "standard" poly bushing hardness is in the range of 75-80 ShA, or about 15-20% harder than natural rubber. Many in this forum like the solid/tight feel these bushings provided as a result, but also said they could feel a little more vibration energy / increased road feel (harshness).
GT4 Racing also makes track & racing subframe bushing poly bushings which are harder (90 ShA).
For me, I want to get the ST185 back to where it was when it was coming off the showroom floor - prefer the softer feel. GT4 Racing can custom make these subframe poly bushings that are closer to the original natural rubber hardness - those poly bushing hardness on special order would be 65 ShA. Still a little harder than natural rubber, but softer than GT4 Racing's normal poly bushing hardness.
Has anyone on this forum ever ordered these special order GT4 Racing ST185 rear subframe poly bushings that are softer than their normal versions (65 ShA)? If so, could you chime in on how you felt these softer bushings worked for you? And what your reasons were to go with special-order softer bushings in this application?
- 52271-20010: Qty. 4: Cushion, Rear Suspension Member Body Mounting
- 52281-20010: Qty. 2: Cushion, Differential Support Member
These OEM natural rubber bushings were supplied with a hardness factor of Shore A 60 (60 ShA).
GT4 Racing makes ST185 rear subframe bushings in poly. There "standard" poly bushing hardness is in the range of 75-80 ShA, or about 15-20% harder than natural rubber. Many in this forum like the solid/tight feel these bushings provided as a result, but also said they could feel a little more vibration energy / increased road feel (harshness).
GT4 Racing also makes track & racing subframe bushing poly bushings which are harder (90 ShA).
For me, I want to get the ST185 back to where it was when it was coming off the showroom floor - prefer the softer feel. GT4 Racing can custom make these subframe poly bushings that are closer to the original natural rubber hardness - those poly bushing hardness on special order would be 65 ShA. Still a little harder than natural rubber, but softer than GT4 Racing's normal poly bushing hardness.
Has anyone on this forum ever ordered these special order GT4 Racing ST185 rear subframe poly bushings that are softer than their normal versions (65 ShA)? If so, could you chime in on how you felt these softer bushings worked for you? And what your reasons were to go with special-order softer bushings in this application?