TT differential oil

[efkreibick]

I am resealing my TT differential in my 1964 Avanti R2 and need a recommendation of what gear oil to use. 

[studegary]

With whatever high quality lubricant that you use, I would add a small container of limited slip additive, like GM makes for Positraction.  

[mfg]

10 hours ago, studegary said:

With whatever high quality lubricant that you use, I would add a small container of limited slip additive, like GM makes for Positraction.  

I also used the GM posi oil when I refilled my '63 last year.

[wwundt]

Redline 80W140 GL-5 Gear Oil

If it was good enough for Ted Harbit, it's good enough for me.*

 

·         Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required.

·         This product is not designed for use in manual transmission or transaxles with synchronizers, as its slipperiness may lead to shifting problems.

·         Popular in stock car racing differentials and transmissions*

·         Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions.

·         High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change

·         Exceeds API GL-5 specification