Since I've got a bit of clonking from the rear when I let off the accelerator at higher revs, I think it's time for a diff mount replacement/upgrade.

I've read about alloy ones, custom filled stockers and I know C-One makes one (this baby).

What's the biggest advantage of a metal/alloy one? I assume all vibrations are directly transmitted to the chassis then and thus make the ride a bit harsh? If the only big advantage is the fact that you never need to replace it again, then Ill get the C-One. Is a alloy one worse for the chassis too (compared to rubber)?

Any other Jap options known other the C-One btw?

Cheers, Rene

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René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be

Rene - don't know of any others apart from stock, solid ally and the C-One jobbie.

Personally I think fitting a solid ally mount is bad news.

This allows for no flex in the drive train and all shocks and vibrations has to be taken up by both the transfer box, the prop and the rear diff.

The additional noise is a secondary problem imho, I'd be concerned that "something" won't last very long...

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Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
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Turbocharging - the replacement for displacement

Tend to agree with Kris. Some people have fitted solid subframe bushes and regretted it as it transfers all the vibration etc. into the interior of the car. If it was me I'd go for the C-One mount. With any luck it will be like the uprated TRD subframe, engine mount and suspension bushes so is a good compromise for a road car.

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Rene,

why not weld up your old one?
http://i32.photobucket.com/albums/d38/s ... tch004.jpg



easy fix! so why not give it a try and see if you notice any difference in ride/noise/vibration:

then decide on its replacement...

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ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

Thanks for your opinions guys

Gary, I've read about that too, but that gives me the same concerns as with an alloy one; more stress on other parts. I know I don't drive an Avensis, it's a rally monster so vibrations and noise are part of the deal, but with my EDFC set at the softest position and no rear seats (prep. for cage) I have those vibrations and noise already. (Hi-Power @ 3k rpm = nice drone) I don't want a car I 'hate' to drive in terms of comfort.. Should stay nice but sporty.

I guess the C-One is the one to get..

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René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be

yep even when stock, i noticed a big noise increase without rear seats.

as i said, its certainly worth fixing if you know a welder. you can see for your self about the drone etc.....then buy its bling replacement.... be it toyota, c-one, mario etc.

p.s what spring rates are you using on your tein coilovers?
how much travel do you get before the coil springs become spring bound?

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ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

Beej & Tangcla are running Alumnium mounts mate, I'll ask them on there opinions. I remember tangcla said vibration increased, but its not that bad at all.


Im running without rear seats also, the noise is pretty bad, blasted trd 1.5way rear diff is loud!

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Got my 'C-One Sports Diff cushion' today. Once again perfect service from Greenline - I sent the money 6 days ago!

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René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be

Interesting to see how this compares against the stock unit e.g. vibration

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Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
_______________________________________
Turbocharging - the replacement for displacement

looks like a very nice bit of kit, hope this upgrade works well. I was just wondering whether movement in the diff mount also puts stress on the drive train ?
I have a solid alloy mount and although the car is loud anyway but if i recall when i fitted it my car was very close to standard and i never really noticed any increase in road noise. my rear diff is the only thing that has not gone yet .
Admittedly if i had knew about the c-one mount i would of gone for that one.
Hutch

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Please take your nails out of my dash..........501.1 Whp

I fitted the C-One today.

I was able to use the 2 post lift at my mates work, which makes this mod a LOT easier I guess. I don't want to think about the idea of doing this with the car on the ground.. To get the old diff mount out, the diff needs to be moved forward and slightly downwards a bit. First step was to soak a total of 14 (!) bolts in WD40:



There it is, the stocker (unbolted already in this pic):



While unbolting the diff itself, I noticed the holes in the diff case are significantly larger than the bolts which go through it. Therefore I marked the diff and chassis to prevent vibrations (and stress in the drivetrain) caused by a wrongly aligned diff later on:



With the help of an extra support we lowered the diff a little bit so I could wiggle the stock mount out over the diff.

OEM vs. C-One (Looks nice and beefy):



Next up; slide the C-One mount in, raise the diff and bolt all parts up again. The new mount in place:



And what a difference it makes! When I lift off the throttle when driving, there are no nasty clunks and weird sounds anymore. All good for the next couple of years and km's!

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René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be