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  1. G

    NV4500 gear lube change suggestions

    Thanks for all the replies guys. After much reading on the subject I purchased the Amsoil recommendation. My understanding is that it’s got to be GL-4 and definitely not GL-5 to protect the synchros. Thanks again for the input.
  2. G

    NV4500 gear lube change suggestions

    Anyone have any dos or don’ts when changing the gear lube on 96 Chevy C2500 NV 4500 trans?
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