Cat3406

Average mileage for rebuild on 2006 CXN613. 
ASET AC 350.

truck has 550k miles and working fine I just want to have an idea so I can put the money aside 

thanks 

Hi everyone,

has anybody experienced this sort of coolant leak with this engine? 

Description:

it leaks somewhere behind the engine, I can’t really tell where is coming from. And it also leaks from a fitting on the right side towards the back. Any feed back will be appropriated. 

Thanks 

AB

40 minutes ago, TeamsterGrrrl said:

Several big fleets ran the 7 speed Eaton and Spicer transmissions at 80k pounds and more with no problems, and that was with a conventional torque rise diesel. With a Maxitorque who can have huge gear splits like the Mack 5, 6, 7, and 8 speeds have because the engines power band is so broad. Sure, you could use a 10, 13, or 18 speed behind a Maxidyne, but it won't deliver the freight any faster. The only major advantage to more gears with a maxitorque is actually fuel economy, as with tighter splits the engine can be kept in it's fuel economy "sweet spot" more of the time. But with the 300 series Maxitorque wide ration transmissions the split between top and the next gear down is only 40%, the same as on the conventional split 9 and 10 speed transmissions. For on highway use you spend most of your time in those top two gears anyway, so there's no advantage to putting a transmission with more gears behind a Maxidyne.

 

I stopped by the local Mack dealer today and I had a chance to talk the shop manager. He gave a similar explanation about those engines and transmissions wich it makes a lot of sense. I'll be running in Texas 99% of the time so big hills are not much of a concern. Another interesting point about this truck is that it does have two rear axles but only one differential. Should this be a concern? Thank you.

3 hours ago, tjc transport said:

350 7 speed is going to be a dog with 80k lbs and hills. 

i ran a 400 8 speed for a while and it was a lot of down shifting when hills were seen. 

 

Thanks for the feedback, TCJ.

52 minutes ago, TeamsterGrrrl said:

Is this the Maxitorque 7 speed or an Eaton or Spicer 7 speed?

It is Maxitorque 7 speed. Thanks.

Thanks, AlexG.

Hello everyone.

I'm new to the forum I have been reading through and I'm amazed how much information is been shared here. You guys are great.  I have been trying to buy a Mack truck for a while but I didn't have the chance until now. I came across a 2007 Mack Vision conventional sleeper truck with an AC 350 (cxn613) engine setup that really caught my attention until I found out that it has a 7 speed (no splitter, straight 7) transmission. I have never seen this set up before on a road tractor. My concern is whether this truck will be able to pull 80k down the road and especially on hills. Is this engine and 7 speed transmission a good set up? Does it have enough horsepower to pull 80k without issues? Thanks in advance. 

Truck's info:

2007 Mack Vision

Engine: AC350

Tranny: 7 Speed

Hello everyone.

I'm new to the forum I have been reading through and I'm amazed how much information is been shared here. You guys are great.  I have been trying to buy a Mack truck for a while but I didn't have the chance until now. I came across a 2007 Mack Vision conventional sleeper truck with an AC 350 (cxn613) engine setup that really caught my attention until I found out that it has a 7 speed (no splitter, straight 7) transmission. I have never seen this set up before on a road tractor. My concern is whether this truck will be able to pull 80k down the road and especially on hills. Is this engine and 7 speed transmission a good set up? Does it have enough horsepower to pull 80k without issues? Thanks in advance. 

Truck's info:

2007 Mack Vision

Engine: AC350

Tranny: 7 Speed