LuisGT3

I sent off my tranny to Copans for a much needed rebuild (I got 50k miles out of his previous cup trans build) and while I'm in there, I will be replacing the RMS, tranny mounts and clutch/flywheel.
I don't drive it on the road very often so I don't mind a more solid or semi solid mount, I replaced the motor mounts recently.
What updated tranny mounts are folks running these days?
I have read about different RMS's (The squeaky 997 turbo units or updated 997 GT3 RMS) What's my best bet to make sure it stays dry and doesn't squeak?
Finally, I am leaning towards the 4.0 Clutch and lightweight flywheel kit. Do I need anything else to make it work on the 996? Any other clutch/lwfw options I should be looking at?
The car has a lwfw and ugraded clutch but at 50k miles on those items, I think I should replace to be on the safe side. Anything else to do while I'm in there?
Any help/opinions would be greatly appreciated.

Nickshu

The 4.0 clutch/LWFW requires the lighter RS crank pulley to go with it on the other end of the crankshaft.

I would do everything in there while it's apart.

Sorry no knowledge to share on the RMS, interested in responses.

Rootwitch

My car had a cracked tranny mount when I got it 2 yrs ago. The shop that did the engine-out work, Dougherty Automotive, replaced them with Cantrell 60A durometer mounts https://cantrellmotorsport.com/transmission-mounts/
That's not a recommendation on my part, just what Dougherty used. I remember Bill Dougherty saying that if the car was going to see street time, the 60A were a better choice.
In hindsight I should have probably used the 85A versions since my car will probably also see less street time.

Nickshu

Worth noting that the original 6-GT3/Turbo mount was superceeded by Porsche with the beefier 997 version. I have a 997 mount with the poly inserts in it.

LuisGT3

Thanks for the heads up. I have the Evoms crank pulley on the car already. Would I need to replace it with the RS?

LuisGT3

Excellent. Thank you!

Nickshu

Not sure. Personally I would b/c they are weighted to function together by Porsche. I would also replaced the crank seal under the pulley while you have it off. Mine started leaking last year and It's a PITA job for a $20 part.

onelove

You should be good, I have same and its very similar to the RS unit (although I am swapping to the dampened unit next engine out).

I went with the 75A mount inserts from Torque Solutions and have no complains. It's a little loud, a little rattly but for how often you or I drive the car its tolerable.

ScottArizona

I’m also interested in the latest and greatest rms suggestion for our cars. Is the crank seal a straightforward r&r when the pulley is off, or are special tools and an expert’s touch required like with the rms?

Nickshu

See my post #34 about the crank seal replacement in this thread: https://rennlist.com/forums/996-gt2-...l#post15243475

spiller

I had the function first mount in my road car, nothing to fault with it.

powdrhound

I use solid engine mounts and a 996Cup clutch. For track work, this clutch is far superior to the 4.0 clutch I ran prior to it. If it's a street car, I'd stick with the 4.0 clutch as the Cup clutch chatters a bit on engagement and has a narrower engagement point.