Forum Discussion

jimrose's avatar
jimrose
Explorer
Sep 07, 2013

Allison Transmisson Model MD3000MH

The 3000 Transmission went into Limp Mode after being in traffic for several hours. Had the Trans checked by Inland Power Group, Carol Stream,IL, (They were originally Detroit Allison before coming under the Inland group.) The finding are all"PSI's" Pressures are low. They recommended Three choices 1.) Over Haul $4800, 6 month warranty, 2.) Rebuilt Trans from Weller (a Allison licensed rebuilder) $6000, 2 yr warranty. 3.) Rebuilt Trans from Allison $7300, 2yr warranty plus tow if required. The RV has 91000 miles and we drive less 10k a year.

May I have some comments on the choices for cost and which one to take. I lean toward #1 because of the small number of miles I drive and cost. I would wait until next April so the warranty would cover 2014 rv season.
Class A
  • Ivylog's avatar
    Ivylog
    Explorer III
    Sep 07, 2013
    X3 on limp mode reboot. I've learned in stop and sometimes go traffic that putting the tranny in neutral (while stopped) will keep it from heating up.
  • sch911's avatar
    sch911
    Explorer
    Sep 07, 2013
    Tom/Barb wrote:
    Limp mode normally reduces the pressures in all circuits.

    Have the ECM rebooted, and allow the transmission to return to normal mode.

    over heating the tranny once should not ruin it. but it will place it in limp mode.

    try it, what do you have to loose?


    One occurrence of limp mode induced by extended city traffic should not trash the tranny. I agree with this post. Clear the codes, reset the TCM and drive it.
  • robatthelake's avatar
    robatthelake
    Explorer
    Sep 07, 2013
    I can guarantee a Rebuilt Tranny for 25 Years.....BUT.....The Price will be $100,000.00

    Seriously Warranties are Not the End All reason to make a purchase . They are offered by the supplier as an incentive to encourage You to trust the product and the Manufacturer or in this case Rebuilder to deliver a product that works as advertised.

    In My experience if it is Rebuilt correctly and installed properly it will be trouble free long after the Warranty has been forgotten.

    If it is going to fail it will fail within the first 2~300 Miles!
  • Tom_Barb's avatar
    Tom_Barb
    Explorer
    Sep 07, 2013
    Limp mode normally reduces the pressures in all circuits.

    Have the ECM rebooted, and allow the transmission to return to normal mode.

    over heating the tranny once should not ruin it. but it will place it in limp mode.

    try it, what do you have to loose?
  • jimrose's avatar
    jimrose
    Explorer
    Sep 07, 2013
    barlow46 wrote:
    Any chance for a second opinion or are you very comfortable with the diagnosis?


    I'm comfortable with diagnosis as I saw all the results. They are a very large operation and do the rebuild/overhaul right there. When you have any service work there the waiting room is over this area and you can see how it's done. Very impressive to see the old timers put one together from a basket of parts.
  • barlow46's avatar
    barlow46
    Explorer
    Sep 07, 2013
    Any chance for a second opinion or are you very comfortable with the diagnosis?

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