can't shift when cold- too thick a gear oil?

[lagoon]

I switched to Valvoline 85W140 gear oil thinking the syncro's like a thicker oil and now I can't get it into gear when cold. - after a few miles, everything shifts ok. any ideas? had Swepco and was a little better. 81'SC

[stormcrow]

I use the same in my 78 911 Targa and yes, when it's cold it's a little difficult to get into gear.

Don't know if there's anything you can do about it short of changing to another MFG oil which may or may not help.

Steve

[kepperly]

I know that swepco is supposed o be the oil for the 915 trans
and everone wants to protect the syncros but have you tried
a synthetic with like 75w140 or red line.
keith

[Eric Coffey]

915's love the taste of Swepco 201.