Simon 3.2M said:
No idea mate as it's something that I have no knowledge of. I'd suspect something only slightly stiffer than OEM, not rock hard or solid mounts.
I ask this because the stock mounts are very soft. And then I mean very very very soft.
Think shore 40A or thereabout.
I use probably the simpelest and cheapest upgrade you can think of in this segment, and that is a standard bobbin. You know, a general vibration isolator, which costs usually between £3 and £4 a piece :lol:
The curved ones are OEM. The OEM ones look beefier, but because the rubber is so soft, there is no comparison. Those new ones are way stiffer.
But here comes the interesting part: those new ones are Shore55A, which are considerably stiffer than OEM. If you're looking at poly ones, you'll find that they are usually made of shore 80A.
Imho thats way to stiff. The force that the gearbox puts on them is not that much, maybe 20kg or so (if you remove the gearbox mount, you can easily hold it up in the air with 1 hand; the whole assembly more or less balances on the motormounts, not the transmission mounts.
The bobbins I used have as international designation DVA1-40-30-M8-23-55 (thats at least one brand that does it this way, In my country we call it a Type A, but in the UK that seems to mean absolutey nothing)
DVA1 is the type of bobbin: DVA1 means threads at both sides
The next number is the crossection of the rubber part: 40mm
The next number is the hight of the rubber part: 30mm
The next number is the thread size: M8
The next number is the thread lenght: 23mm
And the next number is the rubber stiffness: shore55a (you can also get them in 40A and 70A)
So those are the specs explained
The only thing I had to adapt is to fit a thick washer (2mm) under the bobbin as it's about 2mm shorter than the OEM one (but its impossible to get a 32mm high bobbin, they're all 20 or 30 or 40mm high)
Fitted (here you can see that every aluminium part that comes off my car first gets a trip to the beadblasting cabinet :lol: ):
Very easy and one of the cheapest mods you can think of.
And if you have doubts if they last: I did this mod 6 years ago, so about 30k miles and I absolutely dont spare my car (except that its garaged)
These bobbins are I guess pretty similar to the Rogue engineering transmission mounts (back then probably the only aftermarket ones available plus some solid ones) but my first thought back then was: I'm not that stupid to pay 60quid or so for a pair of bobbins...
Liverpool
