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Thread: Part number correction for *better* fitting belts

  1. #21
    General M1008driver's Avatar
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    Dayco didn't like the 15573 part # so I went with:

    Replacement Auto Belt for:
    NAPA nbh 25-7575 or nbh 257575
    Gates 7575 Auto V-Belt XL or
    Dayco 15575
    The other belts you list are GTG

    Tested and Recommended P/N's
    Pass side alt: 15480 (same AZ's P/N for a civvy 6.2)
    Driver's side alt: 15573 (It fits)
    P/S pump 15445 (Same as AZ's P/N for a civvy 6.2)
    I also ordered some belts from RockAuto trying to get the Gatorbacks and they substituted my order. They sent the right numbers, just not what I wanted. Even finding GoodYear belts online was difficult. I will keep them for emergencies. I used Auto Parts Warehouse this time and changed to Dayco.

  2. #22
    General cucv1833's Avatar
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    Quote Originally Posted by M1008driver View Post
    Dayco didn't like the 15573 part # so I went with:



    The other belts you list are GTG

    I also ordered some belts from RockAuto trying to get the Gatorbacks and they substituted my order. They sent the right numbers, just not what I wanted. Even finding GoodYear belts online was difficult. I will keep them for emergencies. I used Auto Parts Warehouse this time and changed to Dayco.
    Quote Originally Posted by Anubis8472 View Post
    I went with the gatorbacks.
    One thing I would recommend is get them asap.
    It looks like no one is carrying them any more and the only way I could find them was ordering online .. (I think from rockauto) and thier stock was noted as basically 'untill what we have is gone'.
    I followed the advice to go one size smaller on one of the belts and they all fit just fine.
    PS belt was a little difficult to get tight, and I still plan to re-tighten it at some point.
    I just ordered the GATOR BACKS from "Summit Racing" in stock
    I studied what was mentioned in this thread and whats in the WIKI that I have used before and this is what I got.

    Gatorbacks Goodyear
    Pass-15491- 48.5"
    Driver- 15581-57.5"
    P/S - 15461- 45.5"

    There smaller than whats in the WIKI and a little Bigger than what MATT1031 posted. I will report back once I install them It may be a week or two.

    My belts are in good shape now but I plan on installing a new Harmonic balancer so while im in there I will istall the New Gator backs and keep the other 3 as spares.

  3. #23
    4 Star General Stonepicker1's Avatar
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    I'm running Gatorbacks on my 3 CUCV's with no problems. The adjustment bolt (driver and pass side)is sitting midway on the bracket.

    Gatorbacks Goodyear
    Pass-15491- 48.5"
    Driver- 15581-57.5"
    P/S - 15461- 45.5"
    Phil
    CSM 88M60/63Z60 /63B/52D

    1984 M1009
    1986 Chevy M1031 into M1028A1 in 1992
    1986 Chevy M1028A2 Dually(New 6.5L GEP engine w/Banks Turbo)
    1986 Chevy M1028A2 Dually, 6.2L
    1991 MEP-003, 10 KW Gen
    1999 CUCV-II 6.5L Turbo(New 6.5 GEP engine)
    2000 CUCV-II 6.5L Turbo
    2000 CUCV-II CREW CAB, 6.5L Turbo
    2000 CUCV-II CREW CAB, 6.5L Turbo
    2000 CUCV-II Dually, 6.5L Turbo
    2001 M-Gator 6X4
    2005 LSSV Chevy 2500 4x4, CREW CAB, 6.6L Duramax
    2006 PU-405, 30KW Gen
    2006 M116A3 1 ton Gen Trl
    2009 A1 M-Gator 6X4
    19?? 4K RT, 4000 lb Forklift(SeeBee)

    VFW Life Member (Hillsdale, Mich)
    PJSArmory.com

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    General Midnight Rider's Avatar
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    Well this sucks. I've already picked up what was listed in the Wiki. I haven't used them yet. I guess I will go back to Napa and try to swap them out to the smaller ones.
    1985 M1009 Sold to another member. I hope he has been taking good care of it.
    1966 Ford Mustang Coupe
    2008 Jeep Wrangler Unlimited X
    19xx John Deere 400 lawn mower (Hey, it's green so I can list it, right?)

  6. #25
    General cucv1833's Avatar
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    Default Gatorbacks

    Just put the gatorbacks on and fit great and no belt slipage like I was having on the P-side
    Attached Images Attached Images

  7. #26
    2 Star General SouthernSteel's Avatar
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    Well i read through all these posts im tired of doing a belt tighting every 3 months payed $60 for all three belts from oriellys which caries gates belts also
    1985 Ex-Military Army M1009(Newest Member of the Family)
    1985 Ex-Military Air Force M1008 (Daily Driver)
    1986 Ex-Military Army M1008 (Parts Truck)
    2003 Ford Crown Victoria LX(Daily Driver Non-Police Car)
    1987 GMC R2500 2wd Suburban TBI 454 (Parts Truck)



    Owning a Cucv is about as Pointless as a White Crayon Without The Help of Steel Soldiers.

  8. #27
    Corporal Glockamolie's Avatar
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    Quote Originally Posted by Stonepicker1 View Post
    I'm running Gatorbacks on my 3 CUCV's with no problems. The adjustment bolt (driver and pass side)is sitting midway on the bracket.

    Gatorbacks Goodyear
    Pass-15491- 48.5"
    Driver- 15581-57.5"
    P/S - 15461- 45.5"
    I just ordered all 3 from RockAuto for $15.96 plus shipping.

  9. #28
    Sergeant Major M923driver's Avatar
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    Quote Originally Posted by Glockamolie View Post
    I just ordered all 3 from RockAuto for $15.96 plus shipping.
    Just ordered from Rockauto, they only have (4) of the #15461 P/S belts left......
    1991 M923A2 "Ruby"
    1950 USCG Chevy 3100 PU "Ole Bubba"
    1986 M1009
    2010!!! Raytheon M1102
    1999 Pribbs Steel M105A2
    1990 Kasel M101A2
    1953 Freuhauf M105A1
    "If you can't fix it with a hammer, you have an electrical problem..."

  10. #29
    4 Star General Stonepicker1's Avatar
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    I just replaced the belts on one of my M1009(wife's truck) last week. I had trouble with the Driver's side- 15581 being a little tight. The old belt was 15585 and was maxed out.

    I had to bump the starter to get the belt on.

    Gatorbacks Goodyear
    Pass-15491- 48.5"
    Driver- 15581-57.5"
    P/S - 15461- 45.5"
    Phil
    CSM 88M60/63Z60 /63B/52D

    1984 M1009
    1986 Chevy M1031 into M1028A1 in 1992
    1986 Chevy M1028A2 Dually(New 6.5L GEP engine w/Banks Turbo)
    1986 Chevy M1028A2 Dually, 6.2L
    1991 MEP-003, 10 KW Gen
    1999 CUCV-II 6.5L Turbo(New 6.5 GEP engine)
    2000 CUCV-II 6.5L Turbo
    2000 CUCV-II CREW CAB, 6.5L Turbo
    2000 CUCV-II CREW CAB, 6.5L Turbo
    2000 CUCV-II Dually, 6.5L Turbo
    2001 M-Gator 6X4
    2005 LSSV Chevy 2500 4x4, CREW CAB, 6.6L Duramax
    2006 PU-405, 30KW Gen
    2006 M116A3 1 ton Gen Trl
    2009 A1 M-Gator 6X4
    19?? 4K RT, 4000 lb Forklift(SeeBee)

    VFW Life Member (Hillsdale, Mich)
    PJSArmory.com

  11. #30
    General amgeneral72's Avatar
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    Quote Originally Posted by Matt1031 View Post
    These belt part #'s are listed elsewhere on SS but I would discourage using them. Both alternator belts will be on the far/long side of adjustment. The 15455 P/S pump belt is too long IMO and cannot be properly tightened if it's stretched or worn even the slightest bit. These are the sizes that were installed (now removed) on my 1031.
    Not reccomended P/N's:
    Driver side alt- Gates# 7575; Dayco# 15580
    Passenger side alt- Gates# 7483; Dayco# 15490
    Power Steering- Gates# 7448; Dayco#15455

    EDIT on 3/11: Gates/Napa 7575 for driver's side alt is a good p/n and fits well, only 15580 is not recommended
    --------------------------------------------------------------------------------------------------

    The following part numbers are from Autozone's computer for an '86 K30 with 6.2

    Alternator (pass side) Dayco 15480
    P/S pump Dayco 15445

    Notice a pattern? Autozone's P/N's are for shorter belts

    ---------------------------------------------------------------------------------------------------

    Tested and Recommended P/N's
    Pass side alt: 15480 (same AZ's P/N for a civvy 6.2)
    Driver's side alt: 15573 (It fits)
    P/S pump 15445 (Same as AZ's P/N for a civvy 6.2)

    The belts that I listed as preferred are pretty much the bare minimum length. All three will all have to be "rolled on" by turning the crank with a long handled 1/2" ratchet or breaker bar even with the brackets fully loosened. You will also *need* a Lisle 12400 belt tensioning tool because with the shorter belts there's no room for the field-expedient prybar method of tightening. The shorter belts are more involved and difficult to install, but on the positive side - you'll never run out of adjustment and run much quieter than the longer p/n belts.


    Auto Belt Cross Reference. Gates Napa Dayco Auto Belt Cross Reference
    Note: Autozone's "Valucraft" line use Dayco P/N's


    Installed new belts on the M1008 per these part#'s. They were tight but work well.

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