BW 35 broken park pawl to remove and refit

[cyf]

Hi everyone,
In a moment of empty head, I put the box in PARK while it was still moving after stalling and "CLONK!" the park pawl broke
Hopefully, the box still worked so I can drive home.
I didn't know nothing about this part and having asked on the forum, I was told by Harvey that it was possible to remove and refit it with the box in the car, one member did it.
So, I decided to try, with the help of Andy and Harvey, thanks to them.
It's possible to do it on your back with the car on stands. If I did it, everyone can!

I do this thread for those who want to do it but,like me, never opened their box.
It's operation EEE2 19 in the WSM

First, drain the oil and remove the pan. I got nearly 4 litre when I drain the box the first day and 6 litre after one week.

The pawl is at the rear left of the box





Here we see the tip of the pawl is broken




with a screwdriver, I remove the release spring...



To free the pin for toggle link



The pin for toggle link removed



In order to remove the anchor pin, I had to remove the extension housing at the rear of the box. It's a little bit hard as you have to remove the driveshaft and the bolt of the coupling flange of the box but you can't prevent the box from turning with the Park position obviously
Once removed, I gained access to the anchor pin and removed it



The pawl is free





But I had a problem, the broken bit was nowhere to be seen.... it was not in the pan and I couldn't see it in the box.
I then took a flexible magnetic finger and put it everywhere in the box and finally found the little bit, what a relief!!



Here's the old and new pawls (the new one provided by Harvey)



To refit the new one, reverse the removal procedure as it's always said in the WSM!
Relocate the pawl and refit the anchor pin



To refit the pin for toggle link I used a "I don't know the word in English but here's a picture"



It was quite easy to refit the pin





I then refit the spring







and it's done!! Well, I have to refit the rear housing, reconnect the driveshaft, refill with oil, but the hardest part is done

Here's pictures with lever in "N" and in "P"

[johnwp5bcoupe]

I have made the post sticky Cyf well done

[Phil Nottingham]

Very useful photos - That should teach drivers to be more careful in future

[enigmas]

Good work Cyf and an excellent record of the repair. It's a character building task if ever there was one. It's also a big lesson in how not to use the Park selector of the gearbox. I'm sure you'll never have to do this repair again. Now make sure to tell your wife what not to do if you're feeling brave.

[cyf]

Thank you all
For sure, I tought that it was a much bigger and strong device that hold the car in Park. Now that I've see it, I won't trust it and the next step,as the car is still on stands, is to make the hand brake work properly. I received the washers from Alan and will do it after the work on the box is done.

[enigmas]

Most non mechanical people (my wife) thinks everything on a car is bigger and stronger than it actually is. (One day I'm almost sure, she separate the handbrake mechanism from the transmission tunnel of her little Lancer coupe!)

[Welsh Warlock]

Well done Cyf. I'm not sure what the grabbing tool you used is called either. I think its a pick up tool.

I'm also surprised at how flimsy the park pawl is.

It always amazes me that as a non native English speaker you produce some of the most informative and well written and well illustrated articles on here.

Although you do need to learn which finger your wedding ring goes on

Looking forward to the handbrake tutorial

[harvey]

Jan 12, 2016 14:53:25 GMT @resurgam said:

The real design fault is that a driver can select PARK whilst the car is moving. It would be useful to have some kind of inhibitor switch to prevent that happening.

BW rectified the problem on the BW65/66. If you try to engage PARK while the car is still moving on one of those the pawl ratchets over the gear without engaging, it only engages when everything comes to a standstill.

[Phil Nottingham]

They had it on the DG box and what is now called "Hill Hold" on moderns - progress its called

[harvey]

Jan 12, 2016 20:03:55 GMT Phil Nottingham said:

They had it on the DG box and what is now called "Hill Hold" on moderns - progress its called

BW35 built to Rover spec (or all with early 6 position selector pattern) has hill hold/anti rollback.

[cyf]

There should have been a lot of broken pawls before the rectification

[cyf]

The car is on the road again, everything works fine;
After refitting the park pawl,refilled the box I went to the rear brakes to remove my cylinders in order to check the handbrake mechanisms and noticed that one of the cylinder was leaking a bit. I dismantled them to see if I can sorted out with new seals, but it would have been to easy: the cylinders were pitted with rust. So I ordered new ones (quite expensive ) and refitted them.
They work fine now.
All that took time because I I have not enough time!