need to drop 604 gearbox

[dieselnutjob]

I now have three reasons to drop the automatic gearbox on the 604.

1. Gearbox oil leak

2. Rear main seal gone on the engine

3. I want to fix a flywheel pic up sensor for an ECU. I think that this will do it http://www.ebay.co.uk/itm/152066051796

 

These have a solid torque tube from the back of the gearbox to the diff, so in order to drop the gearbox either the engine has to come forward or the diff has to go back, something like an inch and a half or two inches.

 

I did this years ago on my 504 diesel but I cannot remember how I did it. Hmm. Oh yes I was swapping the engine at the same time.....

 

The wierd thing is that to pull the engine and box from a 504 sounds like a bastard of a job but I have virtually no recollection of doing it. That said, in those days I was single so no kids taxi duties and cars were more important than house work and decorating, and I had a big front garden in a quiet cul de sac.

 

These days I have a drive on a busy London road.

 

I am thinking that the easiest way is to remove the diff mounts, unbolt the torque tube from the back of the gearbox and shove the whole thing backwards far enough to drop the torque tube.

 

Anyone see a flaw in this plan?

[pshome]

It's much easier to lower the complete rear axle, it's only 3 screws on each side. You can then pull everyting down- and backwards to seperate gearbox and engine.. no need to remove shaft from diff etc.  which is a pain cause its running inside a tube with a bearing half way.

Depending on how far back you want to pull it, you may leave springs and shocks in place.

 

Does the car have a "diagnostics" plug  (i think was fitted from 79 onwards). If so, there is alread a pickup on the flywheel and its wired to that connector.

 

Cudos for doing this in a driveway, no friendly garage around with a lift to use?

[pshome]

P.S. ECU??? What for?

[Joey spud]

In the late 80's i was employed by Peugeot/Talbot and on the 504 pickups to do a clutch Peuget recommended you undo the axle to leaf spring U bolts and the brake pipe flexi and slide the axle up the springs enough to release the torque tube from the gearbox. (obs the 604 isn't on leaf springs).

 

My memory of this procedure is a bit vague but i recall there was a cotter pin or something that needed to be removed before the torque tube would release from the gearbox.

 

Anyway i know i had one that the pin wouldn't budge on so after that it was always engine out to do a clutch change.

 

The last 505 clutch i did in the late 90's i took the engine out on that one too...

[dieselnutjob]

It has trailing arm rear suspension with jointed drive shafts like a front wheel drive.

The drive shafts actually come out relatively easily, just unbolt the brake caliper, then four cap head screws and it just slides out.

I could drop the entire rear subframe but it is f'ing heavy.

I guess I need to get under there and see if there is anything that will stop the diff moving back once the drive shafts are out.

[simmo]

Did you attempt this yet?

[spartacus]

I did a clutch on a 504 years ago, with the aid of a lift. After having a good look I decided the easiest way was to take the engine out, good luck whichever option you choose.

[simmo]

We always pulled the engine on 504s unless it was a diesel estate, where the proper axle just moved back enough, despite the best efforts of the handbrake cables.

[SOUL]

 

Here's the OEM Peugeot pages for whipping out, and back in the 504 gearbox unfortunatly I don't see to have any reference to auto, and only 604TD engine stuff.

 

[dieselnutjob]

Did you attempt this yet?

 

I have to sort out a flywheel / flexplate first.

See this http://www.msextra.com/forums/viewtopic.php?f=101&t=62558

[simmo]

OK, good luck sorting this out; sounds like a bit of a nightmare. Looks like there are knowledgeable people on that forum (not that there aren't on here)

[Richard]

The taxi firm I worked for in the early 90s always took took the engine out to do 505 clutches.

[simmo]

A lot of taxi firms started to use Peugeots because, I believe, they were one of the first to give a unlimited mile warranty and had a credible diesel option. We used to do Tristar Cars and had a chap with a 604 Turbo Diesel which did well over 100K in its first year, which was rare back then.