TopSpeedNY

iTrader: (16)

Neo Synthetic 75W-90/RHD Gear Lube

100% Synthetic Base for Extreme Temp & Wear Problems

Key Features:

* Exceptional Thermal Stability
* Excellent Shear Stability
* Lower Operating Temperatures
* Reduce Wear, Greater Parts Life
* Seal and Gasket Compatibility
* Excellent Low Temperature Flow
* Outstanding Power Transfer Performance
* Excellent High-End Racing Use
* Best Gear Oil in Racing

Used in F-1, IRL, Champ Car, ALMS, NASCAR, Grand-Am, SCCA, NHRA

NEO even increases fuel mileage in tow vehicles

SilverMax_04

I don't see any mention of GL-4. I suspect it is either GL-5 or GL-4/GL-5. You only want GL-4.

JwaxMax99

iTrader: (14)

I've heard of this oil. This is from their website.

APPLICATIONS.

NEO 75W-90 HD Gear Lube exceeds the requirements of auto specs GL-2 through GL-5 and military specification MlL-L-2105E.

NEO 75W-90 HD meets the requirements for GL-4 grade even where manufacturers discourage the use of a GL-5 product. It is recommended for front wheel drive transaxle use where GL-4 performance is specified.

Common vehicle drive train components needing NEO 75W-90 HD are manual transmissions, drive axles, differentials (including limited slip differentials), transaxles, auxiliary transmissions, transfer cases, overdrives, and final drives.

Industrial equipment applications for NEO 75W-90 HD include gear boxes for conveyors and similar assembly line drives.

Gear boxes using this type of lubricant typically do not need any break-in period on petroleum lubricants. The NEO 75W-90 HD can be used as a direct replacement at any time.

NEO 75W-90 HD gear lube will mix with petroleum products; it is not necessary to flush the gear box first. However, mixing a large amount of petroleum with NEO synthetic will dilute the qualities of the NEO and will shorten the service life. This is not recommended. Using aftermarket additives is not necessary and may produce unpredictable results. Use of aftermarket additives voids the NEO warranty.

talkinghorse

iTrader: (121)

Yes, but...the additive packages contained in these oils are typically more aggressive than those used in straight GL-4 lubes, making straight GL-4 lubes the best choice for our applications...and there are several good petroleum and synthetic GL-4 alternatives available.

CCS2k1Max

iTrader: (2)

If you go with a combo rated oil, change it at least every 60K miles to make sure the buffers are fresh.
Hmm. As in FIA's Formula One? I highly doubt it, but I guess it is possible that they may be a partner's supplier's supplier since the AMG safety car likely uses Mobil...

SilverMax_04

Your best bet is to stay away from combo rated trannie fluid. Stick to a fluid that is strictly GL-4 rated. For synthetic fluid, both Amsoil and Redline make a product that is strictly GL-4.

I changed my original factory fill of trannie fluid at 30K miles -- wish I had done that sooner. I will likely change the synthetic fluid now in it at about 80 K miles. The fluid is cheap versus trannie repair, and the change is not that hard to do, having done it once and now owning the right funnel.

TopSpeedNY

iTrader: (16)

thanks guys i have ordered 5 quarts of redline and ready to give it to the tranny thanks for all the help appreciated,

Mike