Jack up plate and "Dynamic Damper"?

[Dulagarl]

Howdy.

I have read a few reports about jack up plates bending becuase of the forces on the bash plate going up through the jack up plate. This has happened with my vehicle, mainly becuase there is a piece of quad attached to the custom bash plate, that in turn concentrates the forces on the jack up plate, bending it in the centre.

I have bought a new jack up plate, which I will install when I have had the headers cut down: this should allow a more conventional mounting of the bash plate to the jack up plate.

In looking at the workshop manual, I noticed something interesting. In the diagram below, compare components 31 and 32 to component 16.

There is a difference between the manual and auto jackup plate, at least in the US manual. I have the auto version, probably becuase the Dulagarl was originally an auto transmission. I naturally bought an auto version to replace the bent one becuase I didn't know better.

the questions I have are:

1. Does anyone actually have the manual transmission version with the "dynamic damper"?
2. Is there any real difference?
3. What the hell does the "dynamic damper" do?
4. If there is any difference, would the manual transmission version be an improvement on the AT version, insofar as preventing bending?

Anyone?

 

[d_generate]

I think we removed mine and used the bolts to hold the bash plate, I just throw the trolley jack under the car near the bolts, it's strong enough to jack pretty much anywhere though a cast alloy one may be a different story, maybe the dynamic damper is to replace the jack plate if you are using a bash plate, bit like an engine mount?????

 

[Kevin]

Very interseting find! Mine has the auto jack plate and I've had to straighten it a little in the past. A dampened version would be good.

 

[Dulagarl]

There is some mention of em on the Nissan forum, but in their case they have em on the auto but not the manual.

https://www.nissanclub.com/forums/g...scussion-1993-2001/200848-dynamic-damper.html