What would be the symptoms of.....

[Camarogenius]

Someone putting gear oil in a ZF-5? I have a suspicion, but it's too wet and rainy outside to find out.

 

[tknomaj]

Stiff and hard to shift when cold after on road for about a hour no problems but if in IL. and cold Very Stiff Some out here on Left Coast Put gear oil in to make it a bit Quieter