Rear Axle: Twin traction oil or additive??

[sven]

So I have a lark with the TT, I've had the car for 6-7 years and never serviced the rear end. Anyone know what the additive or best setup is for the TT rear end??

[avantilover]

Twin Traction is just a limited slip differential, so I suggest asking differential specialists for advice, they will have appropriate fluids.

[Starlight]

So I have a lark with the TT, I've had the car for 6-7 years and never serviced the rear end. Anyone know what the additive or best setup is for the TT rear end??

Your local FLAPS has the additive that you need

[rockne10]

GM Fluid 88900330 added to your 90W rear lubricant. Equivalents permitted.

[Dan Timberlake]

Some high performance gear oils claim to be suitable for LSDs

[StudeRich]

I use the GL-5 90w for limited slip for adding Oil.
Plus on a full oil change, a bottle of Jeep/Dodge Parts Dept. Friction Modifier which is designed for our Dana Spicer Rear Axles used in Jeeps.

[over50]

I used Valvoline SynPower Full Synthetic SAE 75W-90 Limited Slip gear oil. Part No. VV975. This should be available at most FLAPS.