We rarely have to repair rear axles and usually just clean and inspect the bearings and install new oil seals. Be it a Jaguar, Chevrolet or Alfa Romeo, it is rare that we see a ring and pinion that is damaged or bearings that are worn out. I hate to disturb the factory relationship between the ring and pinion gears so if the bearings check out ok, I keep the thing together.

Additionally, most car companies have figured out how to make the final drive robust and problem free because they are aware of the forces involved with the ring and pinion bevel gears – except for Ferrari. They used a deep groove ball bearing and sliding inner race roller bearing that cannot handle the axial loads on the pinion shaft. Other companies used tapered roller bearings that can handle a tremendous amount of this fore-and-aft thrust while spinning with ease but the Ferrari style comes apart and destroys the gears.

My solution is to replace the sliding inner race roller bearing and the deep groove ball bearing with a pair of tapered roller bearings. This photo is a 250 GT Lusso center section with the “chicklet” style limited slip differential. On some axles I’ve install tapered roller bearings to support the differential but on the later axles there isn’t much room to install this type of bearing and I have found the original ball bearing set up to be adequate. I have done this conversion to many cars that have gone many thousands of miles with no issues.

Final drive Ferrari

GT Ferrari 250 Axle Center section

Still looking for someone to explain to us why Ferrari went from the compact light weight and wonderful shifting transmissions in the early 166/195/212/225 cars to enormous and heavy cast iron transmissions on the later 250/330/365’s. Here are photos of the 330 2+2 5-speed and a 166 5 speed. There is about 100 lbs difference in weight and a considerable size difference. Did Ferrari use some truck or tractor transmission for these later cars?

The blue 330 GT 2+2 that came in earlier this year ended up needing an engine overhaul but I was fortunate to be able to drive the car prior to breaking it down. The transmission shifted perfectly but on acceleration/deceleration the shift lever moved back and forth significantly. As some may remember, this same thing happened to a 330 GTC transmission a few years ago and it turned out to be a loose ring nut on the main shaft.

I was certain that we had the same issue on this 330 2+2 and when I took off the top cover, it was instantly obvious that the ring nuts at the back of the main shaft holding the gear cluster on were totally backed off. They are doubled up to jamb together to prevent loosening plus there is a locking tab for extra protection on backing off… but still, someone managed to mess this up. Thankfully no damage was done to the internals.

Huge Ferrari transmission

Early Ferrari 5 speed aluminum transmission

loose ring nuts on a Ferrari transmission

Bill took a few pictures from around the shop today that show both the range and the beauty of some of the cars that we are working on. Sometimes I fear that there is too much “range” and not enough beauty! Bill takes outstanding photos that look super pro. Have I written a post on Bill yet? Bill, can you write a post on yourself, introduce yourself?

Upstairs: the Osca, Whitehead Special, and a silver Ferrari

Downstairs: The rare green 330 GTC and a deep inventory of stored classics, projects, and restorations.

Ferrari 750 Monza at Restoration and Performance Motorcars in Vermont

We have made jigs for re-producing the often rusted and leaking water pipes for Ferrari 250’s. These are not  perfect reproductions but now that we have the tooling we can easily make an exact copy if anyone is interested. We are using Stainless Steel so they won’t rust away like the originals.

Ferrari tubing

250 water pipe

These are 80mm Carello Tail lights, where can I get the identical ones but 100mm in diameter? These were on a Vignale Ferrari 225 Berlinetta at Cavallino and I need the 100mm ones for the 166 Berlinetta that we are restoring.

Tail light

These gauges are made by Smiths for Touring, a company in Italy who built bodies for Ferraris in the early 50’s. They built bodies for other brands like Maserati using light tubing for an armature and thin aluminum for the “skin”. They called this style of construction “superleggaria” or Super Light.

Since Touring of Milan built the body, they also outfitted the car with an interior and all the little delicate detailing such as door release handles and had Smiths make these beautiful gauges.

After photographing a number of Touring built cars with this style of gauge, I found  most to have a beige/tan background color where these gauges appear to have always been dark blue. Maybe because the car was originally dark blue? We carefully stripped the paint and could find no evidence of another color so we had them restored as you see them.

Smiths gauge

Touring ferrari smiths

Here are photos of our jig to re-make a common sized water pipe on a Ferrari 250. We have been making flanges at the water jet shop and have a bunch of the large bell flanges that adapt the 1″ tubing to the larger thermostat housing.

This 304 stainless steel is great stuff, very workable, machinable, weldable.

To see the ones that came off the car click http://www.ferraricraft.com/2009/12/corroded-ferrari-water-pipes/

Fixture to reproduce water pipe

Reproduction water pipe in stainless steel

Alright, all puns aside, the number of different variations of wheel nuts at RPM is astounding. Here are some examples and some more interesting facts about them. Firstly, Ferrari wheels employ singular nuts to fasten each wheel to each axle or hub. So, in your road car, you have generally 4 or 5 lug bolts or lug nuts that hold each wheel on – trucks have more. Ferraris more than any other make, use large racing style wheel nuts, quite similar to those in use on racetracks all over the world, even here in the US in Nascar. Many other Italian cars and some English cars used this method of fastening as well.

The big difference between the wheel nuts on current race cars and on vintage Ferraris? The method of removal. The current race cars use a large diameter socket, while the vintage cars have 2 or 3 ears extending off the nut. The method of removal is repeated smashing of these tabs by the standard equipment lead hammer found in every Ferrari – it isn’t just for fending off would-be attackers. The lead hammer packs a punch, and the softness of the lead won’t mar the finish of the nuts, just watch out for your fenders on the back swing. At RPM wheels are removed frequenly enough to destroy these hammers, so we have a mold to recast the hammer head.

On to the nuts themselves. The word “smontare” seems to be on nearly every nut. » Continue reading “KNOCK IT OFF – WHEEL GOING NUTS”

I sent these gauges off to our trusted re-build shop to be inspected and disassembled and they promptly sent back all of the metal parts for me to send to our trusted chrome plating shop. The Chrome shop but a dull nickel flash on the housings and did a spectacular job re-plating the chrome bezels. The bezels are made out of very thin aluminum and there was a deep scratch in one of them but the shop worked it out and only a trained eye can see the minor imperfection.

The instrument specialist re-painted the faces and needles as well as re-screen printed the “SMITHS” logo and Ferrari logo on the combination gauge. They did quite a service on these, making sure the temperature sensor capilary tube had the correct steel flex housing over the end and everything.  They also calibrated the fuel level sending unit to the gauge. These should work as new when installed into the 166 Berlinetta.

When I look through Hot Rodding magazines, none of the cars photographed have gauges as interesting and beautiful as these, shame on them for not looking at these old european cars for influence on what is cool!

Hand Made Gauges restored

This car looks too cool in this flat black primer to hide from view. We sprayed an epoxy primer to protect the car as we begin to trial fit every little piece of trim. This car is built as though it was a piece of furniture using trim caps and decorative pieces to cover all of the ugly details.

There are chrome end caps for the interior door top strips, trims around the door catches and small mouldings around all of the glass. We had to re-make these mouldings because they were full of cracks because they are a brittle alloy. We made the new moulding from a much softer aluminum alloy so we can bend them into place so everything fits nicer.

Ferrari 166 berlinetta touring

Ferrari Berlinetta