Transmission fluid on a petrol XU BX

BX Tech talk
User avatar
Jugostran
BXpert
Posts: 185
Joined: Fri Sep 10, 2021 6:22 pm
Location: Osijek, Croatia
My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car")
x 43

Transmission fluid on a petrol XU BX

Post by Jugostran »

Hey all!
My transmission has been making quite a loud whining noise for the past few months.
I want to replace/refill the fluid, so I am curious as to where the fill port is.
Looking at the gearbox from the side, is this the fill port?
Also, what sort of oil should I buy?
Thanks!
Image
Proudly daily driving a 1989 BX 16 TRS since 2021

Image
User avatar
David
BXpert
Posts: 524
Joined: Sun Oct 27, 2013 10:54 pm
Location: Manchester
x 47

Re: Transmission fluid on a petrol XU BX

Post by David »

That's the reverse gear shaft bolt, Don't undo that!

The fill plug is on the side of the gearbox, the biggest one in the metal plate, visible from the wheel arch.

If your gearbox is noisy, then it's possible that you'll need a gearbox rebuild, but definitely try new oil first. I can't remember what is in mine. It was recommendeded to me at the time.

Hope that helps.
1992 Citroën BX 1.9 Diesel Meteor 4x4 - The Project.

1992 Citroën BX 1.9 TXD (with GTI engine; Mulleys old car) - Parts car.

2004 Citroën Xsara Desire. (Now gone).

2016 Ford Focus Zetec - Daily Driver. (Absolute bone shaker).
User avatar
Jugostran
BXpert
Posts: 185
Joined: Fri Sep 10, 2021 6:22 pm
Location: Osijek, Croatia
My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car")
x 43

Re: Transmission fluid on a petrol XU BX

Post by Jugostran »

David wrote: Wed Mar 15, 2023 6:12 pm That's the reverse gear shaft bolt, Don't undo that!

The fill plug is on the side of the gearbox, the biggest one in the metal plate, visible from the wheel arch.

If your gearbox is noisy, then it's possible that you'll need a gearbox rebuild, but definitely try new oil first. I can't remember what is in mine. It was recommendeded to me at the time.

Hope that helps.
That is a huge help, thank you!
Someone else found a spec sheet for the exact oil used in mine, so I am covered in that regard.
Also, I'd rather avoid a gearbox rebuild. For now I just want this one to work the best it can.
And, since I am new to DIY, how do I drain the gearbox?
Proudly daily driving a 1989 BX 16 TRS since 2021

Image
xantia_v6
BXpert
Posts: 331
Joined: Wed Dec 16, 2015 6:13 pm
Location: here and there
My Cars: Peugeot 308 CC
Citroen XM V6 ES9
Citroen Xantia V6
Jaguar XJ-S V12
x 52

Re: Transmission fluid on a petrol XU BX

Post by xantia_v6 »

See: viewtopic.php?t=21202 Be sure to use a GL4 oil, not GL5 which is not compatible with the syncro rings in PSA gearboxes.
User avatar
Jugostran
BXpert
Posts: 185
Joined: Fri Sep 10, 2021 6:22 pm
Location: Osijek, Croatia
My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car")
x 43

Re: Transmission fluid on a petrol XU BX

Post by Jugostran »

xantia_v6 wrote: Wed Mar 15, 2023 9:33 pm See: viewtopic.php?t=21202 Be sure to use a GL4 oil, not GL5 which is not compatible with the syncro rings in PSA gearboxes.
Oh, this looks good.
Thanks for pointing that out!
Proudly daily driving a 1989 BX 16 TRS since 2021

Image