We have been hearing a clunking when accelerating from a complete stop and braking

Tiny
DIRTYDIESEL
  • MEMBER
  • 2019 RAM 2500
  • 6.7L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 127,000 MILES
I have the truck listed above diesel 6.7 Cummins. I hotshot so truck is under lots of strain! It has 127,374 miles recently the engine light came on and sounded like transmission (RPMs high but truck not going faster stopped to figure out transmission temperature was 210 never been that high. Let it cool checked fluid appeared normal. About two weeks ago boss had transmission flushed. I know I’ve heard bad idea called place they don’t change transmission filters so was thinking that’s the issue then we have been hearing a clunking when accelerating from a complete stop and braking. Now I’m learning that could be the u joint the noise is in the rear I know a bad CV joint can also make a transmission leak so I’m sure the u joint is shot. How do I know the yoke and differential and transfer case are okay? Also transmission has all symptoms of low fluid yet level appears normal? Transmission is a 69RFE.
Friday, April 2nd, 2021 AT 11:44 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I would definitely do the transmission filter. also you can have a helper look under the truck when you put the truck ingear (drive) and then reverse (foot on the brakes) to see how much movement is in the drive line. Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response. Here is how to service the transmission. Here is a guide to help you step by step with instructions in the diagrams below to show you how on your truck:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Check out the diagrams (below). Please let us know what you find.
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Sunday, April 4th, 2021 AT 10:14 AM

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