Scuderia Auto Repair has extensive transmission experience. We offer everything from simple adjustments to complete overhauls on all Ferrari models.
A recent customer complained of 2nd gear grinding. All the other gears shifted flawlessly and 2nd would shift fine if the revs were matched. Classic synchronizer failure. The following images highlight the repair:
Transmission removed from the car.
Remove the linkage.
Remove the ring gear carrier.
Don't forget to replace the o-ring.
Now remove the ring gear.
Ring gear out.
Remove the retaining bolts on the passenger side and tap the axle out of the case.
Remove all the bolts holding the pinion retaining ring.
Under no circumstances remove the copper oil supply tube for the ring and pinion!
(straight from the Ferrari factory transmission overhaul shop manual)
Remove the rear housing.
Note the alignment of the smaller gear for reinstallation.
Knock the pin out that holds the reverse synchro arm.
Remove the main retaining nut from the main shaft.
Remove the snap ring from the lay shaft and the retaining ring from the main shaft once the pressure is relieved from the slip fit bearings.
Using the Ferrari tool (or a custom made replica), push both shafts out of the back of the transmission by pushing against the lay shaft on the pinion end.
The rear plate will start to separate as you push on the lay shaft.
Both shafts and the rear plate will come out as one unit.
Now, using a special jig to hold the assembly, a shim for the end of the main shaft, and a hydraulic press, carefully push both end shaft bearings out of the end plate. This takes at least two people as once the shafts clear the end plate, things can move around very easily.
Carefully lay both shafts on a clean work surface.
Pull first gear off of the lay shaft.
If you need to replace (or inspect) the 3rd/4th or 5th/6th synchro packs, use a special tool to remove the retaining nuts off of the main shaft.
New 1st/2nd gear synchro pack.
1st/2nd gear synchro pack replaced. Cleaning the threads before using locktite on the main shaft retaining nuts.
Carefully reinstall both shafts back into the end plate.
Using a custom jig to hold the internal assembly vertical, pick up the transmission housing and carefully lower straight down over the shafts until the pinion bearing is aligned in the front.
Applying RTV Silicone.
Tighten all of the end plate bolts in turn to ensure that no binding occurs on any of the bearings.
Reinstall the outer gears as well as the reverse synchro arm. Cover the access holes - you don't want to drop a fastener inside at this point!
Make sure the gears are aligned before securing the cover.
After setting the end cover in place, check the gear alignment one more time using the access port.
Reinstall the passenger side axle shaft.
Reinstall the linkage, reinstall the ring gear and the carrier using RTV Silicone and, Voila! Problem solved. Our technician has rebuilt over 30 transmissions during his career.