ewcort ib5 lsd change

Ok as you may or may not know the LSD (limited slip differential) from a S2 Escort RS Turbo is

interchangeable into the mk5/6 escort's ib5 gearbox. The S2 gearbox as a whole will not fit and

although the S1 gearbox will, it does have smaller bearings and as expected are pretty rare.

So upgrading your ib5 'box is a good option but first you need to source a LSD, so be sure of what

your buying

Reduced: 97% of original size [ 704 x 528 ] - Click to view full image

On the left is a standard open diff and on the right is the LSD.

Now this is ok provided the diff is already removed, but it may not be, so heres how to check its a

slipper:

1. If you look from each end (where the driveshafts locate) you will see the LSD has a 10mm

through hole where the open diff does not.

2. If it is on a car still, then jack and support the front end and rotate the driveshaft. A LSD will

make both shafts rotate the same direction (where-as open diffs rotate the shafts in opposite

directions)

Also be aware that fiesta rs turbos didn't have a LSD as standard but could of been upgraded

(check as above)

Below is a list of what you require:

ib5 gearbox (if you have a spare this will mean you don't have to rush)

S2 Escort RS Turbo LSD

Replacement gaskets and possibly seals too

Gear oil

Large, flat, clean work surface

Bench-top vice

Socket set

Deep sockets or spanners

Circlip pliers

T40 torx key

M8 allen key

Set of pry-bars

Breaker bar

Torque wrench (preferable)

Disclaimer - I cannot be held liable for the accuracy of information in this guide and/or any injuries

or losses as a result of following any such guidelines contained within. Please ensure you

understand you take full responsibility for your own actions when you follow any information or

instructions in this guide.

To achieve this upgrade I think you need to be fairly conversant with a spanner, accordingly I have

given this a 5 spanner rating


Now there is a few variations of the ib5 with front starters on pre '95 models and reverse sensor

located beneath the front mount on pre '97. Mine is a '98 so has a reverse sensor plug on the front

and a rear starter, internally I believe they are basically the same

Ok you've got your box, drained the oil and pulled the shafts..

Remember as you remove each part to lay it out on your bench as it came off, this will help when

you refit


Remove 10x 10mm bolts and end cover


Remove circlip


Remove 19mm dooby


Unscrew T40 torx screw until V catch drops out


V catch


Remove 5th gear selector


Note location (height and position) then unscrew T40 screw and remove toggle


Remove 5th gear


Remove awkward circlip


Remove gear


Top casting now lifts off to reveal two large clips


Tap the clip round to push against the other shaft and knock off

Collect from other side of workshop

Repeat for 2nd clip


Remove ball plug (above) and black plastic breather (pull out)

Then undo 10x 13mm bolts and 4x 17mm bolt/studs


This casting can now be removed and should look like so. Now to remove the diff, the two gear

stacks need to be lifted out. Lift both at the same time and wiggle them to get them free, place to

one side. The diff is now free to be removed and the ring gear needs to be changed over to the

LSD. Hold in a good vise and use the breaker-bar to remove bolts then refit the LSD with ib5 gear


Next bit is quite tricky (Photo above has plate clip removed to show position of pins beneath)

Once the diff is dropped back in, get both gear stacks back into the selectors and align the

selectors on the pin arrowed green, remember to get the reverse pin arrowed red to clip the black

arm far side (this is held in place by the noted toggle earlier) The gear stacks will need a fair deal

of wiggling and swearing to get them back in position

Now your on the home straight! Refitting is the reverse of removal, fitting new gaskets as you go!

After reassembly check all gears engage then fit to car

ewcort ib5 lsd change

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