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Discussion Starter · #1 ·
I own a cruiser, so I don't know too much about trucks. I'm just trying to help out a neighbor.

His W56 makes a wierd grinding noise in first, second and third gears, but not in 4th or 5th. It is a constant noise, not just when shifting. It is a light grinding noise, kind of like the noise you get when shifting a non-synchro gear when the truck is moving. The noise increases with drive shaft speed, not engine speed. There is no noise with the tranny in N, but the same noise with the transfer case in N and the tranny in gears 1-3.

Any guesses about what is causing the noise and how to fix it?

thanks
 

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Discussion Starter · #5 ·
Thanks :beer:

On a related question, since this thing needs to come apart anyway, how big of a job is it? I have done a number of other transmissions, like sm420s and Toy LC 4speeds, but I dunno nothing about trannies with a "center bearing" and plate. Are there any special tools that you just can't do without? I don't have the FSM manual on it yet and the Haynes rag sheet is no help other than showing you an exploded diagram.
 
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