TR Gearbox Grinds After Oil Change

No experience with TR trannies, but in the P-car world, there are 2 transmission oils that seem to sort out shifting gremlins:

Swepco (have not used, but have heard/read lots of positives)

Redline 75/90 NS (non-slippery) (HAVE used and it made 1st to 2nd shifts in my 928 S4 go from unlikely at best when cold to slick & precise).

My advice would be to consult with Redline.

 

Age old problem and has too do with compatibilities with certain syncros on older f-cars. It seems some of the new modern lubes are just too slippery for the old sycros, so the Redline NS seems to be the choice of many as it is very effective. Put it in my 246 and my second gear grinding disapeared. At one point I was putting all sorts of additives in to fix the problem, it was exactly the wrong way to go

 

I use Red Line's 70w90 synthetic "superlight shock proof" gear oil in my 348 Spider. I have Honda-smooth shifts now, even when the car has just been started. I also added the Z-Max tranny additive (for the 150,000 mile transmission warranty as much as anything).

No grinding. Beautiful shifts.

Hopefully you and your mechanic examined your old fluid to verify that you had no bits of metal floating around. You probably also changed out your tranny filter, correct?!

I wouldn't drain half, either. Drain all of the heavy Castrol out. Castrol may even have a lighter weight gear oil that could work for you, I just don't have any experience with it.

 

The TR has no tranny filter to service.

Are you sure it's just the oil... Did any other work get done... Like linkage adjustment, clutch bleed etc etc??

Is the carpet stuck under the pedal? (Don't laugh, it happens)

Was the oil a hypoid type, not just helical? Just curious as I use Castrol with much satisfaction.

The TR tranny should be filled from the top of the transfer housing until it spills out the gearbox level plug.. It takes up to 10 litres!! Is it full!?!

 

Wow!

The 348 has no timing belt tension sensor and the TR has no transmission filter?!

What a world...

 

Yeah, Imagine Ferrari building exotic racy space probes for when we can all fly ourselves to the moon for a holiday.... who's first?

 

i dont own a TR, but i am on my 3rd 3x8 IN 18 months ( i have commitment issues )

the curent owner of my old 308GTS called me a few days ago saying he had changed the gear oil in the GTS. ( which was not due to be changed by the way, as i did all the fluids prior to his purchase) the car was barely driveable with the Redline fluid, but please bear in mingd the Marrone 308GTS had a know 2nd gear syncro problem.

i used regular no name off the shelf gear oil from the parts store and 2 bottles of GM limited slip additive. the car drove fine and would only grind 2nd gear if you shifted out of second near redline.

i am not a fan of putting off required repairs, but its a temporary solution until the trans / diff can be properly rebuilt.

my theory is the notchy gearbox is what caused the former owner ( MIKEP) to spin the car in the rain and hit the curb, leading to my first ferrari purchase about a year and a half ago.

no name gear oil and gm limited slip additive are also in my 77GTB and it shifts perfect with no syncro problems. Dino gear box oil will be changed soon.

 

Is the additive availible at parts store?

 

If you used no GM additive, it might shift perfectly...that additive is what is counter productive to the synchros working properly. Of course you may end up with some limited slip vibration in certain situations....