Rear bumper counterweights?

**AndrewM** · 21st January 2009, 04:11 PM

I was crawling under the back to see where I could run some cables and noticed what appear to be large swinging cast weights up inside the ends of the bumper. I'm intrigued as to what these are for - maybe vibration dampers or something to do auto leveling?

**stig0000** · 21st January 2009, 05:14 PM

i asked the same thing at work,, an they are harmonic balencers for the chassie, there are 2 of them,, one each side, to help get vibrations out of the chassie an help keep it qwiet,,

**Lotz-A-Landies** · 21st January 2009, 05:34 PM

Originally Posted by stig0000

i asked the same thing at work,, an they are harmonic balencers for the chassie, there are 2 of them,, one each side, to help get vibrations out of the chassie an help keep it qwiet,,

I need a little education at this point.

My understanding was that the D3 is a monocoque design and therefore no chassis.

Can someone enlighten me?

**djhampson** · 21st January 2009, 05:40 PM

I thought only the Freebie and Freebie 2 were monocoque?

**BigJon** · 21st January 2009, 05:41 PM

D3 has a monocoque type of body shell mounted on what you could call a chassis.

**Lotz-A-Landies** · 21st January 2009, 05:59 PM

Originally Posted by BigJon

D3 has a monocoque type of body shell mounted on what you could call a chassis.

When you say "could call a chassis" are you suggesting it has a subframe connecting the front end, engine and gearbox to the monocoque but not the rear suspension. Or it has a true chassis that mount all the running gear (engine, transmission, diffs and suspension) and the monocoque body sits on top?

**stig0000** · 21st January 2009, 06:07 PM

yer the LR2 an LM are the only land rovers with a true monocoque, the sport an d3 have both, they run the same floor plan, hence why they are soooooo heavy, its cos of some production resions they have "2 chassis"

**BigJon** · 21st January 2009, 06:43 PM

Originally Posted by Lotz-A-Landies

When you say "could call a chassis" are you suggesting it has a subframe connecting the front end, engine and gearbox to the monocoque but not the rear suspension. Or it has a true chassis that mount all the running gear (engine, transmission, diffs and suspension) and the monocoque body sits on top?

I haven't been under one for about a year, so I am a bit hazy on the mounting systems.

As far as I recall, the mechanical components are all mounted off the chassis and the body mounts on top.

I know the rear driveshafts pass through the chassis rails for clearance reasons.

The Range Rover Sport and the Discovery 3 are very similar in underbody design, but the Sport is on a shorter wheelbase.

**Neil P** · 21st January 2009, 08:04 PM

Someone on the D3 design team posted on D3 UK
3 or so years back that the intention was for weights in
all 4 corners, but costs had to be contained.

The money saved was then spent on the ingenious tow
bar design .... and the underslung exhaust

**Jamo** · 21st January 2009, 09:12 PM

The body mounts onto the chassis and the drivetrain etc is all attached to the chassis.

In the UK (I don't know about here) to do things like replace turbos, they will undo the 12(?) mounting bolts, disconnect the necessary cables etc and then hoist the body off the chassis. Understand it doesn't take much time to do this.

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