Citroen BX Workshop Manual – 46 Pages of Factory Specs

Description

If you are trying to rebuild the automatic gearbox on a Citroen BX Workshop Manual is not just helpful – it is mandatory. I have seen too many DIYers skip the diagnostic checks because they figured they could eyeball it. Then they end up with a box that shifts wrong or leaks. This is the factory document, 46 pages of OEM procedures from the people who built the car. It is not a reprint or aftermarket summary. It is the original Citroen workshop manual for the BX automatic gearbox and drive shafts.

What This Citroen BX Workshop Manual Covers

The table of contents lists operations from XB auto 350 through XB auto 354-1. That means you get the complete flow: tools, diagnostic, specifications, checks and adjustments, removal and refitting, on-vehicle and off-vehicle work, and selector lever repairs. It covers both petrol (1360 cc, 1580 cc, 1905 cc) and diesel (1769 cc, 1905 cc) BX models. If you own a BX with an automatic, this is the only documentation you need for the gearbox and drive shafts.

Diagnostic Procedures: XB auto 350-001

Page 1 lists the diagnostic operation. The manual does not let you start tearing things apart without first running through a diagnosis. You get a structured checklist – not a vague “check fluid level.” Factory diagnostics save you from replacing parts that are not broken. Follow it step by step. That is how you avoid comebacks.

Required Tools from the Factory List

Page 3 shows the recommended tools. You will see part numbers like 3186-T (converter retaining tool) and 6330-T (pull handle for converter). There are also special tools like MR. 630-22/28 A (shim for adjusting conical distance) and MR. 630-22/28 B (hook for converter seal). A TORX EX 27 socket is required for the housing and hydraulic control block screws. The manual gives you dimensions and drawings for tools you may need to fabricate. Do not start the job without verifying you have these – or a workaround.

Use only OEM quality. Period.

Removal and Refitting of the Automatic Gearbox

Operation XB auto 350-1 walks you through the entire R&R procedure. The manual tells you the sequence, the bolts, and the torque values – though you will need to convert metric specs if you only have inch-pound tools. That is your responsibility. The factory specifies everything in Nm and mm. If you want to do it right, you follow those numbers. No shortcuts.

This is where many amateur mechanics mess up: they reuse old seals or skip the converter clearance check. The manual addresses that. It includes a step for fitting the converter seal using the special shim. You ignore that at your own risk.

Working on the Gearbox: In-Vehicle vs Off-Vehicle

Two separate sections: XB auto 352-1 (in vehicle) and XB auto 351-1 (off vehicle). The manual recognizes that some jobs can be done without pulling the whole gearbox. For example, selector lever adjustments (XB auto 354-1) are done in the car. But major internal work – valve body, clutches – requires the gearbox on the bench. The manual gives you both approaches with the exact tooling needed for each.

If you need to compare this automatic to a manual transmission setup, check the Manual Transmission overview. For a broader look at drivetrain technology, the Automotive Industry Overview is useful.

Selector Lever Repairs – Page 1

Operation XB auto 354-1 covers carrying out work on the selector lever. The manual includes linkage adjustments and cable replacement. This is a common failure point on aging BX models. The factory procedure prevents misalignment that can cause harsh shifts or no-start conditions. Follow the diagram on page 1.

Is this manual for the entire Citroen BX or just the automatic gearbox?

It covers the automatic gearbox and drive shafts, not the engine or suspension.

What tools are required that I might not have?

The manual lists several special tools: converter retaining tool 3186-T, pull handle 6330-T, shim for adjusting conical distance MR. 630-22/28 A, hook for removing converter seal MR. 630-22/28 B, and a TORX EX 27 socket. Some are available for purchase, others you may need to fabricate. The manual includes drawings with dimensions. If you don’t have these, you can still do the job with common tools, but the factory procedure expects them. I recommend sourcing the key ones before you start – especially the converter seal hook and the shim. Otherwise you will be improvising, and that invites leaks.

You need the factory data to do this job right. Access the Factory Manual from AutoRepairManuals and get the 46-page PDF. No guesswork. While you are at it, if you have an older Citroen, check the CITROEN Twelve Fifteen 1938-1950 Repair Manual. For other automatic transmission work, the Citroen 4HP20 Automatic Transmission Service Manual covers a different unit. And if you work on tractors, the Massey-Harris-Ferguson TEF20 1956 Workshop Manual – OEM Specs is also available.