1999 Freightliner New clutch installed, problems.

Discussion in 'Ask An Owner Operator' started by RepoweredRookie, Aug 6, 2023.

  1. RepoweredRookie

    RepoweredRookie Light Load Member

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    I don’t know about you guys, but the last couple years, I literally have to finish every job where I bring my truck to a mechanic or have the repair re-done.
     
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  3. FLHT

    FLHT Road Train Member

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    Would like to find somebody that knows how to fix this brand of transmission.
    Will not go in gear and when it does it may work for a while then just stops.
     
  4. AModelCat

    AModelCat Road Train Member

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    Problem is they're just so rare that not many folks have actually seen one. Most truckers I know would pass on buying a perfectly good truck solely because of a Meritor transmission.
     
  5. abyliks

    abyliks Road Train Member

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    we had two of them in the yard, one got scrapped for an rtlo 13, other ones in a dump truck until it blows up and will be swapped with something similar and I would absolutely skip the next one because of that
     
  6. RepoweredRookie

    RepoweredRookie Light Load Member

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    Yeah the mechanic I used said he never seen a Rockwell-Meritor transmission before. I have researched the trans and it’s supposed to be fairly strong and reliable.
     
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  7. RepoweredRookie

    RepoweredRookie Light Load Member

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    You guys are exactly right on this. I pulled the inspection cover, 1/2 inch between clutch brake and TO bearing, checked tabs on clutch brake. Linkage is out too far, so I will try and set it right tomorrow.

    Really appreciate you guys helping me to understand the mechanics and procedure to fix it. Thank you!
     
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  8. SmallPackage

    SmallPackage Road Train Member

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    Most of the Rockwell’s are synchronized that is why floating them is more difficult. The old 16 and 20 speed married boxes in the 1960’s were very strange animals with lots of quirks.
     
  9. Rideandrepair

    Rideandrepair Road Train Member

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    At least the 1/2” gaps right. Next question is why is the linkage off? Did he adjust it? Make sure it’s not sloppy. The ball joint swivel wears out. Also check the cab to frame bushings in the front corners of the cab.They deteriorate and will cause too much free play. due to the cab being closer to the frame. Also if deteriorated bad enough that bottom bolt/washer has a visible gap, the cab will jump up off the frame when you hit a big bump and snap the shift arm in half. Broke mine twice. Been through all that with my 2000 Freightliner. Had me scratching my head. Finally figured it out, when after welding it real good, hit a huge pothole, The fine thread adjuster on the top part of linkage near firewall stripped out, Had no clutch at all. Shop said I needed a new clutch. I finally figured it out. Had to re adjust the linkage. The linkage only work’s correctly if the bushings are good. Nows the time to replace if necessary. Any time they’re replaced it will affect the length of the linkage, and change free play. So, check the little ball joint/tie rod looking linkage pivot at the shift arm on trans for slop. Replace if needed. Check cab bushings, replace if needed. Then adjust linkage at the top near firewall, to get the 1/8” gap at clutch fork that should equate to 1.5”-2” free play.
     
    Last edited: Aug 7, 2023
  10. RepoweredRookie

    RepoweredRookie Light Load Member

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    Well that explains why I couldn’t float the gears. That’s interesting.
     
  11. RepoweredRookie

    RepoweredRookie Light Load Member

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    Rideandrepair, you Sir have saved my sanity. I was ready to wake up this morning and buy the linkage rod, but when I examined the linkage it looked fairly good. Then I saw your post about the cab mounts, and that had to be the issue.

    When I test drove the truck after the clutch replacement, I hit a small bump in the road and thought the doors almost exploded off the truck. So I checked cab mounts with a glashlight and mirror, but you can’t really see anything. I ended up just digging my fingers in there and you can feel the deteriorated rubber bushing.

    Like you’re saying, I still may have to adjust the linkage, but the real issue has been the cab mounts. You saved me big time. Already got 2 cab mounts and 2 cab shocks, and going to install tomorrow. Test drive, and then possibly adjust the linkage.
    Thank you to everyone who took the time to help me figure out this frustrating issue. Had you told me grinding/slipping clutch brake, to new clutch, to clutch linkage, to CAB MOUNTS, I probably would have lost my sanity. The trucking Brotherhood is strong. Thank you! Report on repair/test drive tomorrow.
     
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