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    Allison tapping

    Ok I found the problem. Pulled the starter to check converter bolts and the starter sounded like it had marbels in it. Changed starter and all is good.
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    Allison tapping

    Hello. I have a 2001 8.1 with the Allison. Cold at idle there is a random tap with no rhythm. Sounds like it is in the bell housing. Pressed on all the shield's with no luck. Anyone had this?
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    Where to buy NP263XHD

    Found a guy in Ohio that rebuilds them called Nate's garage. It was $1500 with a life time warranty.
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    P1713 error code

    No it wasn't low and I also filled the cooler to minimize any air. Getting a new battery and swappi g tires then I will get it on the ground and drive it and see what happens.
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    P1713 error code

    Hello all. Just got done installing a new tranny cooler. Started it up and the tranny sounded funny like a clicking noise. Check engine light comes on andcreadd 0700 and 1713. Also my battery is weak. Hoping it's nothing just air in it and a weak battery. Any thing I'm missing?
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    Where to buy NP263XHD

    My transfer case is shot and needs both cases . Any advice where to buy a good tcase with the upgrades?
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    Allison oil cooler

    Thanks for the info.
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    Allison oil cooler

    Hello. I have a 2001 GMC 3500 with the 8.1. The transmission cooler is leaking on it. Is it better to go back with the stock cooler or upgrade to a bigger one? Thanks for the input.
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    Truck will not move in any gear

    Great. Thanks for the help. Going to get it pulled and tore apart. Is there any good tutorials on rebuilding the np263xhd?
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    Truck will not move in any gear

    I just tried it in 4wd. Nothing in high but would move in 4lo.
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    Truck will not move in any gear

    While it's in park you can push it. I got it to pop a couple times while I pushed and the wife listened. She thought it was coming from the rear end around the rear wheels. I thought from the center of the truck. Thanks for help. I appreciate it.
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    Truck will not move in any gear

    Hello all. I'm looking for some help Just got a 2001 GMC 3500 with the Allison with 111,000 miles. When driving it home a felt a small catch a few times. I thought it was probably a miss and didn't think much of it. When I was driving it in to the shop it caught again and sound kinda like...
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