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Topic: My Allison transmission is acting up  (Read 3810 times) previous topic - next topic

Re: My Allison transmission is acting up

Reply #60 –
Quote from: Dave M –
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.

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

Re: My Allison transmission is acting up

Reply #61 –
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

Re: My Allison transmission is acting up

Reply #62 –
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/T200

Price from supplier: Prom Contract - Excel

Pierce

Re: My Allison transmission is acting up

Reply #63 –
The cooler that was installed in my rig was $1600, plus shipping and handling of course.

Roland

Re: My Allison transmission is acting up

Reply #64 –
Roland,

Seems like a more affordable price. You don't have the make/model do you?

Pierce
 

Re: My Allison transmission is acting up

Reply #65 –
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