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Underdrive pulley A/C Belt

Old 03-01-2011, 07:30 PM
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Default Underdrive pulley A/C Belt

So after redoing my motor I totally forgot that the underdrive pulley needed a different belt for the A/C when I cut it off and I threw the old belt away without looking at the part number....... Does anyone know what it is if I went to a NAPA or Advance auto parts for my A/C belt?
Old 03-01-2011, 07:45 PM
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What percent underdrive? I used a Goodyear Gatorback 4040377 for my 25%...
Old 03-01-2011, 07:51 PM
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I believe its just the 25 percent one from texas speed...... im going to try cross referencng there part number and see how it fits
Old 03-01-2011, 07:56 PM
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If anything, take a string, wrap it around the pulleys in the direction it should go, mark, tie and cut. Bring it with you just in case. No one likes making 4 or 5 trips tog et the right part (been there on buddy's EWP/UDP car.) The last couple numbers on the belt should be the size in inches, IIRC.
Old 03-01-2011, 08:15 PM
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Originally Posted by bayer-z28
If anything, take a string, wrap it around the pulleys in the direction it should go, mark, tie and cut. Bring it with you just in case. No one likes making 4 or 5 trips tog et the right part (been there on buddy's EWP/UDP car.) The last couple numbers on the belt should be the size in inches, IIRC.
very true.... Im gunna take a chance the first time and see since I wasnt the owner of the car when it was put on.... after that im going to do some math and measure lol
Old 03-01-2011, 08:46 PM
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OH.. A/C belt.. Duh! NVM then.. That's an easy gamble.
Old 03-02-2011, 12:10 AM
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Gatorback part number 4040377 for the A/C belt. I bought all my belts from RockAuto. Bought 4 Gatorback belts (2 A/C, 2 Serpentine for both our cars) for under 80.00.


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