ZF 5 speed question
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ZF 5 speed question
My truck has an early 4.14 first gear ZF 5 speed with God only knows how many miles on it. It was put in used when I got the truck.
The transmission is very loud at lower rpms and I'm sure it being so loose is what makes it so loud.
My question is, can I put a heavier viscosity oil in it to maybe quiet it down some and if I can what weight oil should I try?
It shifts great and is quiet when the tach is above 1500-1600 rpm. Thinking about trying a 5-20 synthetic. But I am waiting to hear from the experts on here before I do anything,
I don't want to go through something like I did on the Autolite GP deal.
The transmission is very loud at lower rpms and I'm sure it being so loose is what makes it so loud.
My question is, can I put a heavier viscosity oil in it to maybe quiet it down some and if I can what weight oil should I try?
It shifts great and is quiet when the tach is above 1500-1600 rpm. Thinking about trying a 5-20 synthetic. But I am waiting to hear from the experts on here before I do anything,
I don't want to go through something like I did on the Autolite GP deal.
Hotshot
Joined: Jan 2012
Posts: 11,132
Likes: 3
From: Southern West Virginia
Don't put anything other than ATF in it. A good full synthetic ATF is probably the best you could do for it. Do you have a solid flywheel or the original dual mass flywheel? If you have a solid flywheel, then the noise you hear is gear rollover, and there is really nothing you can do about it. If you have the original dual mass, I suggest getting it out of there ASAP!
Thread Starter
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Senior User
Joined: Sep 2012
Posts: 207
Likes: 0
Don't put anything other than ATF in it. A good full synthetic ATF is probably the best you could do for it. Do you have a solid flywheel or the original dual mass flywheel? If you have a solid flywheel, then the noise you hear is gear rollover, and there is really nothing you can do about it. If you have the original dual mass, I suggest getting it out of there ASAP!
I will add a couple of quarts of ATF and see what happens.
Thanks
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