Hard shifting

Check your shifter bushings and the shifter adjustment. Those two items made a big difference in my TR. I run the Redline in mine and like it. But the shifter bushings and adjustment made the biggest change in shifting ease. The shifter bushing in front of the gearbox was the worst. Also clean and re-lube the shifter under the gate.



Ago

 

I had this problem as well. I changed to Redline Oil and it made some difference, but not enough. I changed Clutch fluid, bled the Clutch and the shifting is a lot easier now.

 

Make sure the Redline oil you use is the 75/90NS.
It must be "NS" or the transmission will shift hard.

The regular Redline 75/90 will not work.

 

There is a difference between GL5 and GL4. GL4 is less slippery than GL5 and works better with the synchros. I had a lube rated as GL4/5 and then switched to a straight GL4 and it shifts noticeably better.

 

I can always remember the difference between the two as the NS must stand for "Nifty Shifting"

 

Redline works the best for these cars.

Second gear will always need a few Kms to warm up before it shifts, don't force it in.

I drive mine in first gear for a bit before I go I to second, I don't go into 3rd from 1st, though many recommend it.

Claude, is it stiff in every gear when you shift regardless of up the gears, or down the gears ?

 

Use GL5.


The difference between the 2 is additives for the increased pressure in a high offset hypoid gear system. Lightly used a GL4 may be ok but the car really should have GL5 for proper ring and pinion protection.

 

Does the Ferrari TR have a high offset hypoid R&P ? I believe not, because the pinion gear intersects in the middle of the ring gear. Packard developed the hypoid R&P in the 30s to get a lower floor and drive shaft tunnel. R&P that intersect in the middle generate less friction thus less heat.

 

Look at any transaxle diagram. It is quite clear that it does not intersect at the middle.

 

Ok, stand corrected

The parts diagram is the only drawing I looked at and it is deceiving.

 

If it's that stiff in every gear then it maybe something other than just the oil.

 

If you use Agip get the LSX. Not sure of the difference but I am told by an excellent contact at Ferrari it is the stuff to use. The US distributor can't be bothered to sell it it seems.

 

the R&P is not in the middle, but also not completely at the end.
the most heat is coming from the limited slip diff.

 

Sorry, you are correct! My car has a seperate transmission and differential. Defiantly GL5 for ring and pinion. I was surprised in the improvement in the transmission with the GL4. I guess I should stay in my own section of these forums!

 

The joys of success

 

So: problem solved ??

 

Hi Claude, can you tell us more by now ?