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Eaton 18 speed play in gears

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Collie, Oct 5, 2019.

Page 3 of 7
  1. Oct 7, 2019 #21
    AModelCat

    AModelCat Road Train Member

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    I'd consider changing the u-joint at the back of the transmission if its got high miles. Its already half apart.

    Do the reman transmissions come with a shift tower and isolator bushing?
     
    AModelCat, Oct 7, 2019
    AModelCat, Oct 7, 2019
    #21
    Oxbow and Collie Thank this.
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  3. Oct 7, 2019 #22
    Collie

    Collie Guest

    ok, i will change that out and thank you
    The remans come with everything but the shift tower, bellhousing and rear yoke. They do include alll new air valves and hoses.
    I put on a new shift tower last year so this one is good to go
     
    Collie, Oct 7, 2019
    Collie, Oct 7, 2019
    #22
    Oxbow, Rideandrepair and AModelCat Thank this.
  4. Oct 7, 2019 #23
    Collie

    Collie Guest

    also, no wonder this truck would shutter when slipping the clutch, the flywheel was original, has the old cat part number on it stamped with feb of 2002 manufacture date. I have never been a fan of cutting flywheels or brakes. Makes them not handle the heat well and warp. Cheap insurance to just buy a new one imo. 600k miles on the truck
     
    Collie, Oct 7, 2019
    Collie, Oct 7, 2019
    #23
    Rideandrepair Thanks this.
  5. Oct 7, 2019 #24
    spsauerland

    spsauerland Road Train Member

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    The Cat 7M-7456 is same as Loctite 609 retaining compound (green runny stuff same as used for ISX cam years). Permatex has something similar. I have used blue medium strength Loctite when didn't have any 609 on hand. Need some type of sealant thread holes go all the way thru the crank and will seep oil. Another thing to check over well while you have flywheel out is flywheel housing bolt torque. Might not be a bad idea to pull them out one @ a time and clean, apply thread sealant, and torque them. I have seen many broken, loose ones, and ruined flywheel housings. New flywheel housing from Cat for a C-12 around $3,000 these days. We have our flywheels resurfaced all the time. Max that can be removed from a Cat (most others as well) is 0.040". There is a visual undercut around outer diameter that serves as visual indicator (depth of groove is 0.031 +/- 0.008)
     
    Last edited: Oct 8, 2019
    spsauerland, Oct 7, 2019
    spsauerland, Oct 7, 2019
    #24
    Rideandrepair, AModelCat and pushbroom Thank this.
  7. Oct 7, 2019 #25
    Collie

    Collie Guest

    dam thanks for this, So pull those bolts out one at a time and use the loctite also or are they not through bolts? What should i do with the bolts that require 609? is that stuff available through pete or should i substitute with whatever you used. Whats a good off the shelf?

    edit, just found the 609 on amazon and ordered a bottle. does flywheel housing require sealant?
     
    Last edited by a moderator: Oct 7, 2019
    Collie, Oct 7, 2019
    Collie, Oct 7, 2019
    #25
  8. Oct 7, 2019 #26
    spsauerland

    spsauerland Road Train Member

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    I use blue medium strength threadlocker on flywheel housing bolts to engine block, clutch bolts, and transmission to flywheel housing bolts. Pete should be able to get you the the Cat 7M-7456, but a Napa or Fastenal should be able to get Loctite 609 or the Permatex bearing mount compound. 60950.jpg
     
    spsauerland, Oct 7, 2019
    spsauerland, Oct 7, 2019
    #26
    Rideandrepair and Collie Thank this.
  9. Oct 7, 2019 #27
    Collie

    Collie Guest

    thank you. do i need to use guide studs as manual states for reinstalling flywheel or is that for tech school junkies. i was just gnna throw flywheel back on the crank shaft and bolt it down. thats after i determine where it should be positioned for tdc through hole. havent figured that out yet. looks like the bolts have different pattern to not allow for misalignment of tdc
     
    Collie, Oct 7, 2019
    Collie, Oct 7, 2019
    #27
    Rideandrepair Thanks this.
  10. Oct 7, 2019 #28
    AModelCat

    AModelCat Road Train Member

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    Guide studs make life way easier.
     
    AModelCat, Oct 7, 2019
    AModelCat, Oct 7, 2019
    #28
    spsauerland and Collie Thank this.
  11. Oct 7, 2019 #29
    spsauerland

    spsauerland Road Train Member

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    Flywheel can only bolt up one way. Look at it and you will see bolt spacing is not same on one hole. I made up some T- bolts to handle the flywheel. Cut off heads off of old head bolts to make guide studs.
     
    spsauerland, Oct 7, 2019
    spsauerland, Oct 7, 2019
    #29
    Art Vandelay, Rideandrepair, Collie and 1 other person Thank this.
  12. Oct 8, 2019 #30
    Collie

    Collie Guest

    when i took the bellhousing off the trans, i could see the 2 bearings. I think they are called countershaft bearings. Anyhow, they both say made in china on them and dont say eaton.
    I assume that whoever rebuilt the trans last wasnt an authroised eaton rebuilder? or does eaton use chinese bearings?
     
    Collie, Oct 8, 2019
    Collie, Oct 8, 2019
    #30
    Rideandrepair Thanks this.
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