Re: My Allison transmission is acting up Reply #50 – June 25, 2014, 08:47:57 am A bit late in posting this. Called Truck Ent. in Hagerstown Maryland on Monday and they told me the transmission had been removed and was being rebuilt. Hope to pick up the rig at the nd of this week. Being "homeless" is the pits, DW doesn't like pushing a grocery cart around. Roland Quote Selected
Re: My Allison transmission is acting up Reply #51 – June 27, 2014, 08:15:38 pm Quote from: Roland Begin – June 13, 2014, 05:12:50 pmI am taking the remove transmission and fix whatever needs to be done. They told me they would only replace and charge me for what needed to be replace. I inquired what a reman mission would cost, they found one for 8coach bucks but no core credit. Reman mission more than total labor cost. So I Opted to repair mine. I am happy that they will be installing a separate transmission cooler, no more issues with cross contamination. I contemplated driving with the transmission cooler bypassed and installing a xmission coole myself but decided I am better off letting them take care of it.RolandWhen all said and done...ask for the old parts they replaced.!! Quote Selected
Re: My Allison transmission is acting up Reply #52 – June 27, 2014, 08:20:33 pm When asking for the old parts, you best be careful how you ask, you might get more than you wanted Quote Selected
Re: My Allison transmission is acting up Reply #53 – June 28, 2014, 07:45:14 am Quote from: sfbmw – June 27, 2014, 08:15:38 pmWhen all said and done...ask for the old parts they replaced.!!If they have removed the transmission cooler I will certainly be asking for that as I may be able to get it "rebuilt". Or use it to find a replacement. As for the transmission solenoids, not so sure. Latest word is that the transmission has been rebuilt and they are installing the transmission cooler. Coach should be ready to pick up on Tuesday. Being "homeless" is for the birds. DW is getting tired of pushing the shopping cart. Roland Quote Selected
Re: My Allison transmission is acting up Reply #54 – July 04, 2014, 09:27:54 am My transmission cooler is an intergral part of the engine radiator. It is built into the side of the radiator. When the tranny radiator failed, the tranny fluid was pushed into the engine coolant then out the overflow of the coolant reservoir and all over the side of our Jeep. When the engine was shut down the engine coolant was pushed into the tranny. Not a good thing.OK here is the wrap up. I picked the coach up on Wednesday and got a chance to spend some time with the mechanic that did the fix. He removed the transmission and completely rebuilt it. He told me that just flushing the tranny after getting antifreeze in it was setting up a time bomb. That's why they highly recommended rebuilding versus only flushing.The mechanic remotely mounted a new transmission cooler. The transmission cooler that he installed is one that is recommended by Allison and used in "big" trucks. His major "issues" were marrying the new transmission cooler to the existing engine cooling system. He had to make up couplings to bring the engine coolant through the tranny cooler. He also had to make up new hydraulic hoses for the tranny fluid. The system that he set up is the same as the systems in all our coaches except my tranny cooler is not mounted next to the radiator.The next step was to flush the engine cooling system. Because the transmission cooler is still attached to the engine radiator, the mechanic made certain that the old transmission cooler was also flushed out. He the "capped" off the input and output ports of the original tranny cooler.He then filled the tranny with transsyn and the engine cooling system with antifreeze. And Voila, we are no longer homeless.I drove the coach from Hagerstown Maryland to Farmington Maine watching the engine and tranny temps. Everything was normal. Engine temp right around 180, tranny temp right around the same, just like it had always been.I would have included "piccys" but it be raining here in Maine. Will try to post photos later to close out this thread.Roland Quote Selected
Re: My Allison transmission is acting up Reply #55 – July 04, 2014, 10:02:09 am Glad to hear that you're back on the road and everything works as it should. Quote Selected
Re: My Allison transmission is acting up Reply #56 – July 04, 2014, 10:43:26 am Great news Roland! Glad you're rolling again. see yaken Quote Selected
Re: My Allison transmission is acting up Reply #57 – July 04, 2014, 11:21:13 am Yes, glad to hear you are on the road again. Probably not a cheap fix but food for thought for the rest of us. While our 6V-92TA does not have a trans cooler in the radiator, it does have a different style of transmission cooler where engine coolant could mix with AFT in case of a failure. Wondering now if our type has any history of failures. Will have to look that one up.Think you did the wise option by going to an external cooler. Otherwise, it would have been constantly in the back of your mind.Pierce Quote Selected
Re: My Allison transmission is acting up Reply #58 – July 04, 2014, 02:00:09 pm I am glad that I got a chance to spend some time with the mechanic that also gave me "peace of mind". Although these folks do not work on a lot of RVs, he has thirty years of experience with transmissions. Would not hesitate to go to. Truck Enterprises of Hagerstown for transmission work. They are also a Cummins dealer though not in the Power Club group.Roland Quote Selected
Re: My Allison transmission is acting up Reply #59 – July 04, 2014, 03:32:15 pm Just a note about transmission coolers, on the 8V-DDC engine there is space to mount the DDC TRANS COOLER it fits beside the oil cooler, mounts on block and works great. On the shorter 6V series, there is no room for the cooler, so the heat exchanger in the bottom hose is required and they work fine. Quote Selected
Re: My Allison transmission is acting up Reply #60 – July 04, 2014, 03:49:01 pm Quote from: Dave M – July 04, 2014, 03:32:15 pmJust a note about transmission coolers, on the 8V-DDC engine there is space to mount the DDC TRANS COOLER it fits beside the oil cooler, mounts on block and works great. On the shorter 6V series, there is no room for the cooler, so the heat exchanger in the bottom hose is required and they work fine.On the side radiator U300s, the trans cooler is just forward of the muffler on the driver's side (opposite side from radiator) with the big bottom flex coolant hose going into it.Pierce Quote Selected
Re: My Allison transmission is acting up Reply #61 – July 07, 2014, 11:22:18 am Here is a photo of the transmission cooler that was installed by Truck enterprises of Maryland. The cooler is mounted to the back rail of the coach. I have also included a photo of the old cooler, you can see the plugs that the mechanic installed in the transmission fluid input and output ports. Photos don't show the amount of labor that went into resolving this transmission cooler failure.Roland Quote Selected
Re: My Allison transmission is acting up Reply #62 – July 07, 2014, 07:37:29 pm Here is a photo and link for the transmission cooler used by a U300/350HP side radiator. Looks just about like the one Roland had installed. They also make a straight through model. Before anyone gets too excited, it lists at $2624 and is "discounted" to $2152. The silicone coolant hoses are each about three feet long and must add several hundred to the total before the ATF fittings and hoses are included. Not a cheap installation.Aside from the super HD construction, it does put the hoses on the opposite side from the radiator and there is enough room to fit another radiator to meet any additional HP addition.Manufacture part number and photo at: 29541643-DF - COOLER PARTS & ASSEMBLIES - ALLISON MD/B400/3000RDS/T200Price from supplier: Prom Contract - ExcelPierce Quote Selected
Re: My Allison transmission is acting up Reply #63 – July 08, 2014, 08:20:35 am The cooler that was installed in my rig was $1600, plus shipping and handling of course.Roland Quote Selected
Re: My Allison transmission is acting up Reply #64 – July 08, 2014, 10:51:05 am Roland,Seems like a more affordable price. You don't have the make/model do you?Pierce Quote Selected
Re: My Allison transmission is acting up Reply #65 – July 08, 2014, 12:19:16 pm No, I looked at my invoice and the part number did not make sense. I was told however that it is the cooler that is recommended by Allison for my year and model.Roalnd Quote Selected
Topic: My Allison transmission is acting up