C5 4HP20

pavlebo · Post by **pavlebo** » 07 Aug 2014, 19:46

I have c5 with automatic gearbox 4HP20. Today we hear a strange sound from the direction of the gearbox. When placed gearbox in position D, the car goes for about 500m and then stopped, changed from D to R is not helping. I turned off the car and after 15 minutes, repeat, C5 go around 500m to 1 km, and then stop again. Pressing the accelerator pedal is not helping.

Whether the transmission is destroyed?

citroenxm · Post by **citroenxm** » 09 Aug 2014, 19:39

Yes it sounds like the box has expired and will need replacment or rebuild.. Had it ever had a Fluid change at all?

What sort of miles,? Which engine petrol or diesel? Diesel 2.0 hdi use AL4 and 2.2 HDi use the HP4 20.

ZF claim a sealed for life gearbox, but none are really. A fluid change always helps a gearbox work for longer.

pavlebo · Post by **pavlebo** » 10 Aug 2014, 18:00

170000 km. Diesel 2.2 HDI. ZF 4hp20 gearbox. No, fluid never changed.

citroenxm · Post by **citroenxm** » 10 Aug 2014, 18:48

Thats what has helped kill the box then sadly and its only going to be a replacement box or rebuild..

Post by **CitroJim** » 11 Aug 2014, 13:11

I concur it's dead.

Rebuild is possible but be prepared to replace the oil pump and have the TC refurbished.

See my website for details of how to do the rebuild. It's easier than it looks

Post by **RichardW** » 11 Aug 2014, 14:21

CitroJim wrote: It's easier than it looks

We so need ROLF back

BTW, the page about splitting the box is not found, Jim....

Mandrake · Post by **Mandrake** » 11 Aug 2014, 15:01

RichardW wrote: BTW, the page about splitting the box is not found, Jim....

The link in the top left works, the one in the bottom right doesn't...

Post by **CitroJim** » 11 Aug 2014, 17:59

Mandrake wrote:
RichardW wrote: BTW, the page about splitting the box is not found, Jim....
The link in the top left works, the one in the bottom right doesn't...

Thanks both, I'll fix that when I'm next in the web server...

And I've brushed up on vi commands

Post by **CitroJim** » 11 Aug 2014, 18:01

RichardW wrote:
CitroJim wrote: It's easier than it looks
We so need ROLF back

After just having done an RX-8 'box recently and having stripped an ML5 I still say automatic 'boxes are easier than any manual box...

Easier perhaps being a relative term

citroenxm · Post by **citroenxm** » 11 Aug 2014, 18:04

I need to delve into an al4 but need to work the courage to do it first. ..

Post by **CitroJim** » 11 Aug 2014, 18:24

citroenxm wrote:I need to delve into an al4 but need to work the courage to do it first. ..

Get a scrap one as a practice-piece and go for it Paul.

I never recommend going into one you want to fix properly unless you've practised first on a scrapper.

You've got the manual haven’t you?

citroenxm · Post by **citroenxm** » 11 Aug 2014, 23:46

Yes I have.. anyone have a scrap al4 I can mess with then???

pavlebo · Post by **pavlebo** » 14 Aug 2014, 10:37

I got another one, used, useable transmission 4 HP20, that has a similar mileage.
Tomorow i'll dismantle old one.

citroenxm · Post by **citroenxm** » 14 Aug 2014, 17:15

DO A FLUID CHANGE NOW!!

Use ONLY Esso LT71141 fluid ONLY, DO NOT USE any Dexron type fluid!

Post by **CitroJim** » 14 Aug 2014, 17:37

citroenxm wrote:DO A FLUID CHANGE NOW!!

Use ONLY Esso LT71141 fluid ONLY, DO NOT USE any Dexron type fluid!

Paul, excellent advice on both counts

The second is absolutely mandatory. Take care of fluids that claim to be LT71141 compatible. They aren't and a look at the small print will show they're actually Dexron III in disguise

Only Esso and Mobil make the genuine stuff.

French Car Forum

C5 4HP20

C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20

Re: C5 4HP20