365 GT 2+2 Gearbox rebuild

Have a pro do it.... these boxes can be very tricky...tom yang did mine a few years ago and it shifts like a dream

 

Agree, take the whole transmission out and do a full re build by a pro shop. You will be happier in the long run and the car deserves it.The 365 gt 2+2 is a fabulous car and you won't regret it.

 

Generally, 3 of 521767 and 1 each of 521768, 521769 are required, but if there is severe wear , 3 of 522047 may be a good idea. All new bearings would be a smart move too.

As previously mentioned, unless you have experience, specialty tools and technical information, get it done professionally. It's not rocket surgery, but it's complex enough that I wouldn't want to be R&Ring the tranny multiple times to get it right.

Here's a pic with the sliders and rings highlighted, it doesn't include 5th which is on the output shaft, but it's basically the same parts and assembly.

 

Send it to an experienced professional and you will love it for another 50 years if cared for. The car will be grateful for it and you can enjoy a true marvel of a car.

 

the synchros have a cone and this cone is connecting to the gears and bring them to the same rpm as the shaft. and after then the sliding sleeve will connect to the teeth.
so the new synchros are a little thicker in the inside diameter becaus ethey are not worn out as used ones

 

Note, there are two different models of the 365 2+2 transmission, so be sure and use the correct parts manual that matches the car.

 

You are most likely thinking of a different style of synchronizer assembly. Like this image from a Tremec T5:
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In this style assembly the blocker ring has "sacrificial" brass/bronze teeth that guide the slider onto the dog teeth of the gears. The blocker ring also acts as the clutch to match the differing speeds of shaft and gear.

In your transmission and most older Ferrari transmissions, the sacrificial teeth are not present on the blocker ring, and the slider directly engages the dog teeth on the gear. I believe the slider is slightly softer than the gear and takes most of the wear.

If you do have worn dog teeth, the entire gear needs to be replaced. This is why later designs from Getrag use a blocker ring with teeth as it helps prevent wear to the dog teeth. If the transmission has been operated for a long time with worn blocker rings, you may infact need new gears, especially 2nd and 3rd as they tend to take the brunt of full throttle shifts.

 

Hi all,
I'm facing the same issue as described in this thread, these answers were already very helpful. Does anyone know the best way to disassemble the gearbox? Is it necessary to remove the engine before removing the gearbox or is there a more direct way to remove the gearbox? Possibly from the side of the rear axle? By removing the transmission shaft?
Thanks a lot!

 

Engine DOES NOT NEED TO COME OUT...and if rear main bearing needs to be done would do it at same time Some interior pieces need to be removed but engine stays in

 

Thanks a lot for the answers! I'd be very happy for more instructions and some pictures. However I'm not just starting yet, but planning it for the next few months.

 

365GT2+2 is a great car to drive and a huge part of that experience is the precise and nearly self placing gear shift while on the roll. have it done by a professional who knows them well and you will not regret it for the next 50 years ;-)

 

What was done?

 

Sorry, I meant specifically within the gear box, what was replaced, reconditioned, etc.

 

I suspected one of these when you first posted, looks great, glad to see it sorted

 

Mr. Lipman --

What kind of condition was your car in when you purchased it?

Did you update the rear shocks or go with the original system?

Thanks