4 speed trans lube?
Senior User
Joined: Jun 2010
Posts: 117
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From: Evanston,Wyo
The local Auto zone guy Tony who has a whole fleet of dent sides told me to run straight 60 weight gear oil, I told him I was sure it was suppose to be 80/90, but he said with the cold winters that 80/90 just makes the whole shifting so stiff until the 80/90 gets warmed up. Has anyone ever heard of running 60 weight in there np 435 or t-18 manual trans???? I think the guy may be just full of S%#$@T, but he really seems to know his stuff for being just a parts sales man.-LOL-
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Joined: Aug 2001
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The local Auto zone guy Tony who has a whole fleet of dent sides told me to run straight 60 weight gear oil, I told him I was sure it was suppose to be 80/90, but he said with the cold winters that 80/90 just makes the whole shifting so stiff until the 80/90 gets warmed up. Has anyone ever heard of running 60 weight in there np 435 or t-18 manual trans???? I think the guy may be just full of S%#$@T, but he really seems to know his stuff for being just a parts sales man.-LOL-
For years at work and currently in my truck I use Shell Spirax 80w90, both diff and tranny. Awesome stuff.
Josh
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