I changed to Amsoil sysnthetic gear oil in my 4 speed and it did not shift correctly. Honestly it's been so long ago and I left it in for a short time only, so I forgot exactly what my symptoms were. I think it was just hard shifting. I called Jamie Passom and he told me the old 833 needed regular gear oil the make the synchros work properly. He told the Amsoil was too slippery.
Synchros do not work when at a stop and shifting into any gear.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
