Forum Discussion

Gjac's avatar
Gjac
Explorer III
Jan 26, 2017

Auto park replacement

I am familiar with the auto park system on an early Chevy P-30 chassis. Does anyone know what system is on a 2009 Workhorse chassis and how it differs from the earlier auto park system?
  • Gjac's avatar
    Gjac
    Explorer III
    mlslcan wrote:
    I am not sure of the actual year but somewhere around 2006 a parking pawl was added to the Allison 6 speed transmission and the auto park brake was removed. About 2003 the J71 auto park brake was replaced with the J72 version which was a complete redesign and a more robust system that did not see the same failure rate as the J71 version.

    Knowing what chassis you are looking at (P30, P32, W18, W20, W22, or W24) and the year of the chassis (which might not be the same as the RV) would help to determine which transmission is in the RV and if the auto park brake was used.

    Mike
    It is a 2009 MH on a W22 chassis.
  • Gjac's avatar
    Gjac
    Explorer III
    mike brez wrote:
    Gary try in get in touch with Rodger user name oldusedbear he sent me a bunch of stuff for my old P30 auto park. His email. rhaag11@charter.net

    I'm gonna give you a call to see if you can swing by my house on Saturday if your free
    Thanks Mike but I am going to look a MH on the WH chassis on Sat. Yeah Roger helped me a lot with my auto park also.
  • Gary try in get in touch with Rodger user name oldusedbear he sent me a bunch of stuff for my old P30 auto park. His email. rhaag11@charter.net

    I'm gonna give you a call to see if you can swing by my house on Saturday if your free
  • I am not sure of the actual year but somewhere around 2006 a parking pawl was added to the Allison 6 speed transmission and the auto park brake was removed. About 2003 the J71 auto park brake was replaced with the J72 version which was a complete redesign and a more robust system that did not see the same failure rate as the J71 version.

    Knowing what chassis you are looking at (P30, P32, W18, W20, W22, or W24) and the year of the chassis (which might not be the same as the RV) would help to determine which transmission is in the RV and if the auto park brake was used.

    Mike
  • It depends on whether the 2009 has the W22 or the W24 chassis...the W22 has a conventional foot parking brake (my gasser did) ...but it is totally a completely different system..