W124 auto to manual

[Deleted member 11979]

I am after some help

I have a 1992 w124 300ce auto with a gearbox that flares during up shifts

I have always fancied it being manual as I prefer them

Which gearbox will fit?

I understand it comes down to flywheels and input shaft lengths

Would the set up from a 190 four cylinder fit? Or does it have to be from a 6 cylinder car

Help gratefully received

Thank you

 

[carat 3.6]

You need the flywheel from a 6cyl m103/4 car to get the correct pickup for the ignition, a 4 cyl item will bolt up but it wont run on all cylinders. The parts can come from a w124 or 190, but the gear linkage rods and front propshaft section must be w124 due to the differing lengths.

Gearboxes with the long input shaft are for solid flywheels, short input shafts work with the daulmass crap.

You will also want to change the diff to one with lower gearing, yours will be 3.07 and you'll want to get a 3.65 or 3.92.

Takes about 2 days to do it properly.

The difference between a 300 auto and a manual is like night and day, so much more responsive.

 

[Deleted member 11979]

Thank you for that, makes sense

Just one thing; is the changing of the diff to make the car rev higher or lower at any given speed?

Also, presumably the cruise is disengaged when the brake pedal is pressed at the mo, is there the same switch on the clutch too?

Thanks

 

[carat 3.6]

Thank you for that, makes sense

Just one thing; is the changing of the diff to make the car rev higher or lower at any given speed?

Also, presumably the cruise is disengaged when the brake pedal is pressed at the mo, is there the same switch on the clutch too?

Thanks

The auto diff is quite high for a manual box, so when trying to pull away it will feel very high geared and "flat". It will rev less on the motorway though.

Changing it to a lower geared diff gives you the acceleration and responsiveness, but the trade off is that it will rev more to do so.

The cruise will still work from the brake pedal, but some cars did have a switch on the clutch pedal to disengage it too, it doesn't really matter as it's only an extension of existing wiring.

 

[Deleted member 11979]

Thanks for your help