sparg · Mar 21, 2012

Obviously, on foreign roads...
I briefly tried the 80-90mph speed range, and was surprised how noisy it was in my 2002 double cab p/up.

Given that my previous, and more battered '90 station wagon was fine at these speeds - well, noisy, of course, but not quite so deafening - in fact, not so much difference between 70-80 and 80-90 (again, on foreign roads, of course). This one is mechanically better in many ways,yet...
The worst noise..and vibration - come when backing off the throttle (I know, chicken!) coming back down from 90 -to-80.

I know what uj vibration feels like, I would think that wheel balancing would make itself felt at lower speeds, but no sign of vibration at 70 (on motorway, obviously)
First thought: propshaft balance?

666 george · Mar 21, 2012

First thought & second thought: propshaft

sparg · Mar 21, 2012

hmmm
would I be right that the only way to test the hypothesis would be to remove one prop at a time, and try it out on 2wheel drive at 80-90 (have to go abroad, of course)?

MrJC · Mar 21, 2012

Could it be the tyres are not suited to doing 90mph? I think that's almost a land speed record as it is!........stick to 60mph

sparg · Mar 21, 2012

"stick to 60mph " - well, naturally, in this country I do.
Tyres = good (general grabber AT2); in fact the scorpion 285 MTs on my last one were fine at those occasional high speeds, and the brand new BF goodrich ATs (same size) that were on the vehicle when it was nicked, were also fine ( I noticed as the vehicle departed)

It's not much of a problem, to be honest, but if I want to take it down the autoroute again, I'd like a teeny bit more usable top speed.

Stupot4x4 · Mar 21, 2012

At that speed the vibration is the body trying to leave the chassis

dieselwheasel · Mar 21, 2012

Stupot4x4 said:
At that speed the vibration is the body trying to leave the chassis

I have to agree, if you feel the need to do that speed you better buy another vehicle. I'm not surprised you are getting vibration, if I had done that in mine I would have had to walk back and pick up the bits that had came off.

GINGE · Mar 21, 2012

As above really. It aint made to do that kinda speed and considering its age parts/bushes will be worn etc so doing that speed wouldnt be advised.

That dosent solve your problem i know but you would need to either strip it down and build it with new parts or just go and buy a new puma.

Christ knows mine wouldnt like 90mph

And mines a 99 TD5.

Drookit Dug · Mar 21, 2012

Just accelerate through it! It should settle down around a ton!

jonny2tanx · Mar 21, 2012

Drookit Dug said:
Just accelerate through it! It should settle down around a ton!

:crazy_driver::hysterically_laughi

goonarmy · Mar 21, 2012

maybe a 110 int the motor ya want

richfish1 · Mar 21, 2012

Perhaps you'll want to take a Ferrari off roading next? :boink::doh:

chunkymunky · Mar 21, 2012

you are officially a mentalist!!! :crazy:

i would be gobsmacked if your tyres were speed rated for that kind of speed!

just you in it? cost any parts fail or sudden lurch its gonna be a youtube special

boomer8 · Mar 21, 2012

P'raps the laccy bands holding yer nitrous oxide tank in place need uprating

Stupot4x4 · Mar 21, 2012

Drookit Dug said:
Just accelerate through it! It should settle down around a ton!

:hysterically_laughi :hysterically_laughi

Pikey · Mar 21, 2012

I reckon the problem is that, at about 65mph. The vibration is so bad the needle swings so much it looks like it's doing 90..

300tdistu · Mar 22, 2012

BIG_GINGA_BEARD said:
As above really. It aint made to do that kinda speed and considering its age parts/bushes will be worn etc so doing that speed wouldnt be advised.

That dosent solve your problem i know but you would need to either strip it down and build it with new parts or just go and buy a new puma.

Christ knows mine wouldnt like 90mph And mines a 99 TD5.

my 1985 with a disco engine has made it to 91 on the sat nav

not doing it again tho

DavidJR · Mar 22, 2012

sparg said:
Obviously, on foreign roads...
I briefly tried the 80-90mph speed range, and was surprised how noisy it was in my 2002 double cab p/up.

Given that my previous, and more battered '90 station wagon was fine at these speeds - well, noisy, of course, but not quite so deafening - in fact, not so much difference between 70-80 and 80-90 (again, on foreign roads, of course). This one is mechanically better in many ways,yet...
The worst noise..and vibration - come when backing off the throttle (I know, chicken!) coming back down from 90 -to-80.

I know what uj vibration feels like, I would think that wheel balancing would make itself felt at lower speeds, but no sign of vibration at 70 (on motorway, obviously)
First thought: propshaft balance?

Where you buying the cheap diesel from?

sparg · Mar 22, 2012

Ok - I asked for a ribbing! :behindsofa:

I should explain that I don't habitually expect that kind of speed out of a defender! - in fact I just travelled through Europe - 1275 miles- at between 59 and 68mph - usually 64. Apart from the odd burst just to see - which is when I found out.

Nice trip overall, lovely views round Milau bridge, averaged 27 mpg.

No, I was simply wondering where the vibration was coming from, and if it might have implications for the long-term health of drivetrain, bushes (it has some Poly replacements, but not all through) etc.

On the question of Ferraris for offroading - even with a +3" lift, the lack of beam axle means some of those tricky cross-axle rock climbs are really out of the question.

I think the tyre speed rating isn't a problem...

As regards fuel economy - as long as the tanker can keep up, it's not really an issue...

Drookit Dug · Mar 23, 2012

Have you had your wheels balanced?

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