I'm surprised that it's possible. My 1955 Jaguar had an interlock to prevent that. Once the rear oil pump (driven from the gearbox output shaft) was providing oil pressure, it would hold the parking pawl out.
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I'm surprised that it's possible. My 1955 Jaguar had an interlock to prevent that. Once the rear oil pump (driven from the gearbox output shaft) was providing oil pressure, it would hold the parking pawl out.
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
https://www.aulro.com/afvb/images/im...13/06/1285.jpg[/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
Here I was thinking it was a measly roll pin or such. That sucker looks tough as nails.Quote:
Originally Posted by Skiboy
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.Quote:
Originally Posted by omvanders
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.
Quote:
Originally Posted by Skiboy
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 :D
There was actually an awful lot of work went into the parking pawl design as it's a safety critical (litigation ahoy!) item.
On older auto's the governor valve was attached to the output shaft directly behind the park pawl. On occasions the governor would stick on V8 fords C4 transmission. We would chuck it into park at about 40 kph, hoping that the vibration from the ratcheting pawl would free up the governor.
At that speed it was just a small ratcheting noise doing no damage.
As others have said, if it holds in park ok you have nothing to worry about.