cvtbenhogan

Just installed RS engine mounts, a nice upgrade.

Some background. My pcar is an 06 with 40k and had the original mounts. After a SSK install, the shifting became notchy when cold, was not great going 1st to 2nd, and was very balky down shifting to 1st. I then installed FF transmission mounts (yellow), and shifting improved but with significant NVH at 4K rpm and above. The most notable improvement was redline shifts became lot more stable and smooth. A PTX oil change helped a bit too. All in all, I was still not happy and considered taking out the FF tranny mounts.

After reading a lot of posts, I ordered the RS mounts from Renn parts and they called (5 minutes) right after my online order to confirm they were sending the longer thru bolts. Great service! On a Saturday no less.

After the install I can report better shifting and more muted vibration going thru 4K. High in the rev range there is some more noise but not the course vibration. Livable for the street and entertaining! Car feels more planted and all gates feel generally better. I'll probably leave the FF tranny mounts in now.

Vibration is not an issue to be concerned with and RS mounts are a good option over OEM. An easy mod with the only trick being using a 18m box wrench inside the engine bay. Leave the wrench handle lodged against one of two top bolts (thread these in leaving 1 inch raised). After the thru bolts are torqued to 60 ft lb from under the car, remove the box wrench and finish off the two top bolts at 18 ft lb.

Engared

My car has the SSK and suffers from the same issues you have.

Ill look into the solutions you posted here. Cheers mate.

ATSR

This is an upgrade that I’ve been thinking about for some time, but after my terrible experience with the NVH created by the yellow FF transmission mounts, I’m worried that it could have the same result.

cvtbenhogan

The FF tranny inserts (yellow) create a lot of NVH. I doubt the RS engine mounts alone would create anything near the vibration caused by the FF tranny inserts. As I mentioned, the RS mounts smooth out the NVH at 4K and above. There is slightly more noise at high RPM, but it's not NVH like or coarse.

I assume you removed the yellow FF inserts?

ATSR

Thanks for the feedback. Good to hear that it’s not bad above 4k, but how about below and at idle? My car droned and hummed pretty badly at idle with the inserts.

Yes, I removed the FF yellows and went back to stock.

cvtbenhogan

No extra NVH at idle and nothing at all thru the shift **** (someone had suggested this in a related post).

At just over 3K, there is a very slight extra buzz that then disappears at 3.2k approx. Again, I still have the yellow FF inserts in there. I'd take them out, but it's a pain DIY job and they do help with the aggressive 5 - 7k shifts.

Plan to install the FF shift cable linkages next. It's getting there.

ATSR

Great to hear, thanks!

I’m very happy with the FF linkages by the way. I’m sure you are going to like them too.

One thing that I’ve noticed since installing those a few hundred miles ago, is that it seems to have fixed completely the occasional problem of shifting into 1st. Hasn’t happened even once since I have them.

cvtbenhogan

Thanks! I'll order these as soon as FF offers for sale.

Presto

Will the RS engine mounts fit the 997.2 as well?

Does anyone have the Porsche part number for it?

cvtbenhogan

Yes they'll fit a .2. Fit years 1989 thru 2012. Recommend Renn Parts and indicate you need the longer thru bolts. I went with the URO brand, which included OEM bolts and washers.

shrumdog

installed the rs mounts from renn part yesterday. I didnt use the washers on the bottom mounting as there is so little room with my awe exhaust and the original was just the washer nut anyways. Results, very happy, car is tighter shifting and more rigid corners with small amount cabin noise increase. I went with the URO brand w porsche hardware. Thinking about the trans oil next but looks like a pain with my lowered car and jacks only so high.

Johnny DB

You need to use the washer...it does not go on the same side as the flange nut. Check the placement of both 7D

nwGTS

you have to use the washers or the mounts could bind at worst.. NVH at least.
lowest nut is a flange nut so no washer needed as you state... assuming by 'washer nut' you mean 'flange nut'.

cvtbenhogan

geeky

Anyone have the URO P/N?

EDIT: Found the URO P/N 96437504381KIT

But can someone please measure the length of the bolt and diameter? Along with OD of the washers? I honestly think this kit can be sourced and made individually for close to $125 if that.