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hey guys, I just bought a np300, 4x4 auto. when I accelerate to 20km from a stop, and mash the brake, im getting thud sound and slight jerk, I can feel the jerk from the floor.
feels like a loose battery slidng around or something loose and sliding about in the tray.
van is currently doing 900km, but I noticed it since the first day I got it. took it to rampersad, they checked it and the mechanic said all 4x4's do that.
did some research of my own, think it might be diff backlash,

help pls

Automatic transmissions tend to do that I have felt it in all vans except for hilux

Dat mechanic has mango tree withdrawal syndrome... op 4x4 vans dont have a sliding yolk that goes into the tranny. But a sliding joint on the drive shaft... when you accelerate the shaft slides out as torque causes diff rotation. When you decelerate its supossed to slide back in smothly. If it wasnt lubricated properly it will stick and will slide in when under alota pressure= loud thud with effects..... so go buy a grease gun and grease crawl in find d nipples and greass it yourself... dont rely on those guys who may not do anything when u go to service. If u want itdone right do it yourself

Check the following thread which dealt with this viewtopic.php?f=41&t=236360&hilit=diff+backlash

it could be when it changes to 2nd gear at the time u release the x pedal

i got two nissan navara d40 from neal and massy and from day 1 drive them i got the same backlash sound when changing gears an massy say that's normal

So the new navara is just as problematic as the last one?

My navara did that to

DVSTT wrote:So the new navara is just as problematic as the last one?

if you call backlash a problem.....

OP what ur getting is not really a problem, simple trouble shoot for your problem, next time accelerate and when ur going to stop, shift into "N" and just depress the brake pedal, see if the problem is still there, and the mechanic is correct, all 4X4s do that, just different vehicles absorb it better tru their drivetrain, what u getting is called axle wrap, auto navaras experience this the most, worse again when they are lifted, then again some dont, not all vans are the same spec/built/plant/transaxle etc.......

this link has some of the best descriptions and solutions to the problem,

http://www.tacomaworld.com/forum/1st-ge ... p-mod.html

D40s comes with some soft rear springs, good for flexing and they take away from the rigidity of a pickup making the rear seat ride a bit easier, buit that decreases the load carrying capacity, i personally dont see how a 900km old van could need greasing, yes the slip yoke needs to slide, but unless its a swapped part, it is supposed to be in perfect working condition.....

I NOTICED, WITH 4WD ENGAGED, THERE IS NO NOISE

One of the reasons I was reluctant to purchase from companies...

*$kїđž!™ wrote:One of the reasons I was reluctant to purchase from companies...

why exactly?

sliderz1 wrote:

*$kїđž!™ wrote:One of the reasons I was reluctant to purchase from companies...

why exactly?

heard alot of ppl complain about their after sales service....plus I personally prefer to deal with the established car firms.....

*$kїđž![TRADE MARK SIGN] wrote:

sliderz1 wrote:

*$kїđž![TRADE MARK SIGN] wrote:One of the reasons I was reluctant to purchase from companies...

why exactly?

heard alot of ppl complain about their after sales service....plus I personally prefer to deal with the established car firms.....

X2. At some dealers, the quality of the install of some of those Aftermarket parts is very poor.

can ne one explain what the difference between the leaf spring as opposed to the coil springs?...heard massy bring coil spring models and maska/rampersad bringing the leaf spring model...ne one test drive etc?

norrek1991 wrote:I NOTICED, WITH 4WD ENGAGED, THERE IS NO NOISE

I notice that if I do not engage 4WD for about a week I start to hear & feel it.
Not a problem anymore since I drive in dirt everyday.

*$kїđž!™ wrote:

sliderz1 wrote:

*$kїđž!™ wrote:One of the reasons I was reluctant to purchase from companies...

why exactly?

heard alot of ppl complain about their after sales service....plus I personally prefer to deal with the established car firms.....

Because the authorized ones supposedly know what they're doing/ don't partake in bobol?
The after sales service at many authorized stealerships are far from stellar as well.

Basic leaf spring axle wrap symptoms, I guess the ones from Massy won't have this problem since they are coil springs in the rear.

interesting read