Transmission and Engine Mounts, Solid vs Hydraulic

[grasscutter]

What is your opinion between solid vs hydraulic? I imagine most cars won't offer you both. In my case it's a GM 3800 application and apparently the aftermarket companies give you a choice. The factory mounts were all hydraulic except for the rear mount which has always been a solid block of rubber. My left transmission mount has leaked out all of its hydraulic fluid which is why I hear a clunk when pulling into the driveway in reverse. The hydraulic fluid is the same exact color as PAG refrigerant oil which was throwing me for a loop for about a week.

 

[Elroy the Brave]

Go hydraulic for sure.

Solid causes too much vibration.

 

[clinebarger]

PAG oil is clear unless it has dye.

Use OE mounts, You can thank me later when you don't have to do it again because of trash aftermarket mounts!

 

[grasscutter]

Elroy the Brave: The vibration from solid mounts would be at idle speeds I assume, correct?

Clinebarger: Where do you get OE mounts for a 26 year old car?

 

[clinebarger]

Acdelco has a online parts catalog, While it's a little clunky...It does work to get OE part numbers.

 

[edyvw]

Always use what the factory recommends. Going solid can create a trickle effect. For example, on my BMW, I have polyurethane bushings in the rear subframe, but that requires a polyurethane bushing or an M3 bushing on the differential. That is not a problem when you want to upgrade components for various purposes, but I am not sure you are doing that.