Gear box oil

Worked MAGIC in my gearbox mate!!
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I'd used the OEM tranny fluid, Redline's Superlight Shockproof, Redline's MTL, and am currenty on Redline's 75W90NS.


The Shockproof had the best shifts.

 

I'm using Redline 75w-90NS in my 355, used it in my 87 328GTS too.

 

just switched to it on thursday and went for a lot of driving this weekend. It is much better with the superlight shockproof. Do it.

 

I just used a 75-90 product made by BG. BG is a chemical company that you will only find in nice shops and dealerships. They are highhly respected in fuel injection stuff (cleaning). I have a friend who is a local rep that sells for them. It's a pretty big thing down south here at dealerships. Anyway, my tranny has never shifted better, I was totally impressed. You will have to find a local rep or got to a local dealership and ask if they have any or can get you some. Very reasonable priced also. I've used Swepco, RedLine and all, and this has worked great for me. Just My 2 cents worth

 

Funny you mention them, friend of mine is a local BG rep as well. I never heard of them but apparently they're pretty good. I'm trying the fuel injection cleaner this week (not a tank add in, it connects to the fuel system and does a complete 'flush'. First on my daily driver, maybe on the 355 later.

 

What gear box fluid is used in F1 355's?

I ask because F1 355's don't seem to have a problem shifting into 2nd gear when cold.

 

According to the workshop manual, the F1 355 specifies the same Shell gear oil as all other 355's.

 

With all the talk about transmission gear oils helping cold shifting I tried Redline 75w90NS (in my 355) after previously having the OEM Shell gear oil.

Never had any particular problems with the OEM oil (usual balkiness when cold) but I also found absolutely no improvement with the addition of Redline.

I think I will probably go back to the OEM at the next change.

 

Any recommendations on internet sites that offer redline 75 90 NS for a good price? No one local carries the stuff and I'd like to do a fluid change this summer. Thanks in advance.
Chris

 

Even great gearbox oils aren't going to always smooth your shifts if you shift at low rpm's.

You'd better have your 348 motor above 3000 rpms to go *in* to 2nd gear smoothly when cold, and I'd suspect similar or higher rpms for 355's.

 

I got mine through amazon. Found a case of 12 quarts for $140 for the shockproof stuff. The regular stuff was cheaper

 

Or you can check the prices at Summit Racing: www.summitracing.com. That's where I get it.

 

Brian Crall (Rifledriver) said that if he had a particulary balky gearbox, he used Redline MTL and it would usually do the trick. But he started with Redline 75w-90 first. Not sure why....perhaps the MTL is considered less suitable for the application, even if it does improve shifting?

 

When I talked to Redline about this recently they said: “A GL-5 gear oil is designed specifically for high offset hypoid applications, as you mention the Ferrari final drive doesn't have hypoid gears so an EP type gear oil shouldn't technically needed. The MTL is a 70W80, a lower viscosity than called for [Ferrari calls for 80W90] as well as being a GL-4. My biggest concern with its use [as opposed to 75W90NS] is the viscosity difference.”

I was also told that MTL and 75W90NS have very similar coefficients of friction, which suggests to me that they should be comparable in terms of getting the synchros spinning. Since Brian found MTL to be somewhat better in smoothing rough shifts maybe the difference he noticed is due to its lower viscosity.

 

That was a very interesting article by 'rifledriver'

How does Redline MTL and NS compare to Redline Superlight Shockproof?

What is the the viscosity and intended uses ?

 

I've used both. Redline's MTL shifts better in my 348 than Ferrari's OEM tranny fluid, but Redline's 75W90NS shifts better than does the MTL.

I'll also add that Redline has confusing names. Redline offers both "75W90" and "75W90NS."

Very similar names, but very different results. The 75W90 does *not* improve your shifts. The 75W90NS *does* improve your shifts.

...and Redline's Superlight shockproof improves 348 shifts even more than does the 75W90NS.

 

Yeah, this is what I found through my research online as advice from you No Doubt and others like Pap, so I went straight to the shockproof stuff.

 

The Redline website says: “SuperLight ShockProof™ A unique product with the viscosity of 75W90 gear oil but lower internal friction similar to that of an ATF. Used when temperatures are not high and when the maximum power output is required such as in stock car qualifying laps.

Used in low-power road racing transxles like Formula Vee and low-power SCCA Production classes (dog-ring type, generally not sycro application where this product can be slippery).”