Re: O/T Ford truck ZF 5 speed transmission

Posted by e on January 28, 2007 at 10:54:24 from (69.130.244.161):

In Reply to: O/T Ford truck ZF 5 speed transmission posted by Steve Crum on January 28, 2007 at 10:05:56:

I went through a learning curve with this subject recently as well.

I put a NV3550 in my dodge as an upgrade from the AX-15 that came from the factory. I asked the parts guy at the local dodge dealership what oil I should run it is. He said Mobil 1 75w-90. So that is what I put in. The transmission was hard shifting and made a lot of noise at idle. I did some research and found the oil that should be in it is more of a 30 weight made by penzoil. The stuff is like water, but it quieted down the transmission, it shifts silky smooth AND I have noticeably more power and better economy to boot.

Moral of the story.....things have changed from the old days and tolerances are considerably tighter. If you are using the recommended oil and are having issues, then you are just masking the issue by changing to a thicker oil.

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