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Welcome to the 3500HD.com forum created October 2009

Author Topic: NV4500 noise  (Read 1295 times)

BigBlackDually

  • Single Axle Driver
  • *
  • Posts: 13
  • Age: 35
  • Location: St. louis, Michigan
  • TJ & K Towing & Recovery LLC
NV4500 noise
« on: September 12, 2013, 07:52:36 PM »
I have a 94 3500hd with the 454 tbi and NV4500. I built the trans from spare parts, all from sound running transmissions. this is not my first time building a nv4500. I have done several with good success. after about a week of driving, i'm starting to get a bearing noise. its not the main shaft or counter shaft bearings. its more of a rattle, but i'm sure its a bearing. I only hear it in 5th gear, and if i pull it into neutral and coast. the noise is mainly when cold. sounds like 10 lbs of screws in the trans. the funny part is, if i drive in 4th for 5 to 10 minutes will the trans oil starts to warm up. the noise goes away. any idea what bearing it may be? I am running the GM liquid gold oil, just in case you were wondering. wondering if anyone else has had this problem?

 


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