Nolathane Diff Bush Noise Fix?

[Full Monty]

what power level are you running steve?

[senna_T]

there is quite allot of deflection / distortion of the new bush, it looks like the top half of the bush compresses down quite allot, leaving a gap between the bush and subframe. I wonder if somewhere in between this compound and the original would be better?

You have to remember the shape of the Super Pro bush also, its tapered towards the centre:

So even though it is flexing on the outside, the centre is firmly seated

[CSV_LS1]

Will this fit bf model too? Looking to replace my pedders bush for this one since the rear will be comming out soon.

[Guest STEVE_BAXR]

You have to remember the shape of the Super Pro bush also, its tapered towards the centre:

So even though it is flexing on the outside, the centre is firmly seated

yep yep I was just going to put up a photo to show that but you did it cool.

Bf ? should be the same just have a look under your car to see if the bush is offset to top I had 2 bushes one was big with the bolt in the center and the other was offset to the top BA mkii .

[Guest STEVE_BAXR]

You did some great videos. Someone mentioned that the AU independant rear is better than the BA-FG. Does anyone have pictures of an AU setup to compare the two.

just some info I found also have a look in the photo's the FG ( with front and back ) looks the same a BA,BF ?

A KEY component in BA Falcon's improved dynamics is the adoption of Control Blade independent rear suspension as standard across the range, finally putting Falcon on par with Commodore - on paper at least.

One drive is enough, however, to sense Falcon's all-new multi-link system has leapfrogged both Commodore's simpler Control Link trailing arm set-up and the sophisticated but heavy double wishbone IRS it replaces on top-shelf Falcons.

Attached to an 88 per cent stiffer chassis and available in four levels of tune - more than any previous Falcon - Control Blade raises the ride/handling benchmark for entry level Australian-made motoring considerably.

Similar to the rear suspension found in the Ford Focus and Jaguar X-Type, but locally modified for its first rear-wheel drive application, the Control Blade relegates the both the Falcon Forte's long-serving Watts Link live-axle system and the AU IRS to the dustbin. Though it was developed to be as robust as the previous beam axle set-up, BA wagons and utes continue with the rigid Hotchkiss live axle system.

Working in concert with a thoroughly retuned version of Falcon's tried and proven double wishbone front suspension, the XT's Standard IRS is shared with Futura and Fairmont, while the slightly firmer, lower Sports IRS/17-inch wheel and tyre package is standard in Fairmont Ghia and optional on downstream models.

Finally, the even more serious Tickford IRS is available exclusively for XR models, while Heavy Duty IRS offers increased ride height and yet stiffer springs and dampers for the most demanding XT sedan buyers. Control Blade effectively separates the ride and handling functions of a suspension, with a long, beefy longitudinal trailing arm basically serving the former and lateral links maintaining the latter. Attached to a steel underbody-mounted subframe via a large, plush bush, the substantial trailing arm is compliant in vertical and horizontal directions, which reduces noise and harshness transmission and allows the lateral links to precisely define castor and toe angles better handling.

Put simply, XT's new rear suspension offers better wheel location and is mated to a stiffer body with a wider rear wheel track and bigger wheels, which improves handling and allows a more compliant set-up. Despite delivering better ride quality than both AU Forte and VY Executive, BA XT will sit flat and composed in corners its predecessor would have floated cumbersomely through, as well as absorb mid-corner potholes or bumps that would have both cars skipping and crashing in protest.

The vastly better planted rear-end conveys a greater sense of security and confidence than before, and combines with Falcon's neutral chassis balance and feedback to provide XT with the kind of ride comfort, road holding and body control expected of more expensive large sedans. Greatly reduced bodyroll, more progressive breakaway, a much quieter cabin and the general feeling of solidity and luxury are simply icing on the cake.

Downsides? Although lighter than the outgoing IRS, Control Blade still contributes significantly to XT's big 144kg overall weight (and slight fuel) increase over Forte. Mainstream Falcon customers have lamented Commodore's standard IRS for the five years since VT was launched, but the wait nonetheless appears to have been worth it.

Did you know?

Barra Falcon road tests were carried out in three continents - Australia, USA and Europe, with suspension tuning conducted at the famous Nurburgring circuit in Germany

[eblis]

Any one know if the new version of the Superpro diff bush for a BF is available yet? Is it part #SPF3232K?

[cobramad]

Love it,

that's thinking outside the square, clever and quick and Cheap!!

Mal K

[turbotrana]

If I were to solve (or substantially help) this problem (I really haven't looked into it much) I would consider doing a double bush set up. This would mean fabricating a diff hat that has two bolt points for the bushes and there seems to be room where you could fabricate a mount to weld on the diff cradle where you could put two bushes side by side. It may mean cutting the original bush mount on the diff cradle and repositioning it to the LHS a little so the second bush could be accomodated.

From those videos that were posted its clear that there is mainly up and down movement in the bush area and two bushes are possible.

Anyone with any thoughts on this.

[senna_T]

Its a good idea and one that Harrop have employed for the Late model camira IRS rear end. It isn't a cheap option at $550 - and that's a mass produced item, can't imagine what it would cost to tool one up..

[turbotrana]

I had a look at the Harrop Sports rear cover and there would be a huge difference between the stock setup and that double setup. With the Expensive Daewoo its an easy bolt on setup, whereas with the ford it would need some cutting and welding, but still not to hard if you tool up and make a kit for it.

Here is a link to the Harrop cover

http://www.harrop.com.au/root_folder/driveline_components/images/diff_cover_rear_1.html

Edited 04/09/09 02:58 PM by turbotrana