Thread: Putting an auto in Park when moving.... DAMAGE?

Mechanical sympathy was taught to me at an early age. The vehicles we had on the farm needed every bit of it!

I have put the handbrake on when in Neutral for as long as i can remember, it certainly is a good habit to get into. Particularly if you consistently park on any sort of an incline.

BTW - tha car drove to work perfectly with out any unusual noises, except the viscous fan bearing which i diagnosed when replacing the serpentine belt....... now off to search for the bearing number / size. I suspect CBC will stock them.

The auto park mech is fairly robust but simple

Here is a D1 park at the back of the auto box - in park the square cut arm moves into the cog wheel on the main shaft

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If yours works then great - prob just took the edge off some of the indentations on the cog

Certainly not worth removing the transfer case so you can look at it.

Ski boy

Originally Posted by Skiboy

The auto park mech is fairly robust but simple

Here is a D1 park at the back
Ski boy

Here I was thinking it was a measly roll pin or such. That sucker looks tough as nails.

Is it harmful to apply the handbrake in a Disco 1 auto when still moving so as to come to a stop e.g. when other braking mechanisms fail?

Originally Posted by omvanders

Is it harmful to apply the handbrake in a Disco 1 auto when still moving so as to come to a stop e.g. when other braking mechanisms fail?

Less harmful than running into the back of something, but it's really not something you want to be doing. Has the potential to wreck diff and transfer case.

Hi I shouldn't really admit to this but in my younger years in a company ford panel van heavily loaded I on more than one ocasion as a prank used to slip it into nuetral whist driving forward at about 80ks rev the throtle and then slip it into reverse. Would come to a slow stop and then go backwards with molten rubber spraying up the side of the van. Did this in early transits and falcon panel vans. The ZF is a very tough gearbox.

Originally Posted by Skiboy

The auto park mech is fairly robust but simple

Here is a D1 park at the back of the auto box - in park the square cut arm moves into the cog wheel on the main shaft

[/URL]


If yours works then great - prob just took the edge off some of the indentations on the cog

Certainly not worth removing the transfer case so you can look at it.

Ski boy

The angle on the faces of the notch in the parking pawl should be designed so that the pawl won't engage above a certain speed, it will just ratchet over the top of the notches on the output shaft instead until the speed drops and it will then engage. Yep, it certainly makes racket!

I used to work for the same company as Chops and as he says, park pawl engagement abuse testing used to be an integral, often entertaining part of the transmission R&D
There was actually an awful lot of work went into the parking pawl design as it's a safety critical (litigation ahoy!) item.