I personally like the Cat motor. They are very good little motors and seam to get really good MPG's. We have 3 of them in 26" refrigerated box trucks and a 6spd and all were getting over 9mpg and they are loaded with frozen meat everyday. I think you can even add Jakes to these motors, not 100% sure but I am thinking it was a C& the did that too ( it may have even been in a 6500)
DS79

 

2008




Usually I see the 4500 crew with the 6.6l packed 3/4 the way under the cab and I HATE to hear one clanging from one of their many common failures that require you to jack up the cab just to remove the valve cover. The C 4/5 series Topkick have the 6.6 as an option, and they cant stay together in them. I have seen PLENTY of them nuked at work. I have some pretty good pics on the shop computer I can post if you are looking for some entertainment. I thought I had some pics on this thread but I guess not.
https://www.dieseltruckresource.com/...ight=bully+dog

GM is really good about warrantying failures even with power adders, which is a plus. I have also changed injectors with over 200k on them and our rep will policy them. (LB7)

I have yet to see a 03 filled from the factory with Transynd. I know I have done PDI's to them in 03 and they did not have it. As a matter of fact, I know of a customer that took his 05 5500 w/CAT to get the tranny serviced and he switched it over to Transynd, per my recommendation. Only a educated salesman will know to order the truck with Transynd, and there are not a lot of them that know how to spec out a truck correctly.

I ran this VIN and it comes up as a 03 4WD Tracker. I ran it though the GM SI site to see a little more about your truck. SI has been known to be wrong and I cant check the warranty from home, I do not have the log-in here. That is a lot more accurate.

 

Yup. C7 = 3126.

 

I guarantee you thats wrong. SI has so many stupid errors like that.


yes yes I am aware of that.

How do you know for sure? Transynd doesnt smell, look, or taste any different than regular Dex III.

Are you aware of what an Allison 1000/2000RDS is? Almost all of the 560's have them.

Im sorry you have to deal with so many blown up duramax's. 230k miles of running a bully dog cranked up, towing at max GCWR all the time, and probably not caring about EGT's anything. Ive never worked on a -560, but I would think it would be easier because the doghouse is removable?? Working on the dmax's in the pickups stinks.

Yeah I know its not a cummins and it cant go 2 million miles running 800rwhp on all stock parts, but I dont consider that durability "poor" considering the abuse the truck was under from the bully dog tune. If it was stock I would say "it should have lasted longer" but not tuned.

ben

 

Boys... lets make sure this is a friendly exchange of info... everyone pulls their info from different sources...

I know matego is a diesel mech... so I know he sees some stuff...

Ben, I don't know what you do yet, but you sound pretty smart about this stuff.

Lets not argue... lets learn...


Love you long time...

mad

 

Sorry I didnt mean to come off like an edit, I didnt mean to insult matego.

I feel badly when my posts are misinterpreted...

IF they have changed and now you can option the 6.6 in the 6500, I would be VERY surprised. It is in no way a heavy duty enough engine for that class truck. Thats why im 99.8% sure its an SI error.

 

Oh, no man... I'm as cool as they come... I just know how this typed media is, and how a couple hot blooded men are talking about trucks!

Just slowin her down a little...


Oh, and just for the record, I could care less if the monkey boy got his feelins hurt or not...

 

Thanks pal.

Anyway, Dura, I know what I have seen. I run a shop that does 3mil. a year in service sales (minus parts) there is a lot of volume. I have seen a 6.6l w/emissions in a 6500. It was a Budget rent-a-truck.

You can pull the dogboxes out all day long in the 4500's but the body hits the cover when lift it about 2" up. If there was a quicker way, I would have figured it out with all the corroded injector tubes that I have changed.... no power adders needed there for that failure. How about the spun #4 cam bearing problem blocking off the oil feed to the turbo? Another quality failed component. All engines have issues but the Dmax is not bullet proof like many think.

When a qualified tech changes to transynd or it is factory filled, it has a tag indicating it. Its white and about 1 1/2 x 2" rectangular attached to the dipstick. I do not have to smell or taste a container of monkey pooh to confirm what the label says.

I dont like to get into arguments like this so I will let you believe what you want. I have GM documentation, could show you build records, or even snap a pic of the engine in the truck and you would accuse me of photoshop.

 

Any pictures or a VIN? If you serviced it, there should be a record and VIN. Im sorry, I still dont beleive it. If there is some other hard proof, then Ill go eat crow and you guys can tar and feather me as much as you want. But until then I maintain GM has NEVER put the 6.6 in anything above a 5500.


never said it was.

I respectfully disagree here too. Ive seen plenty of -560's without the tags. Why does it need a tag indicating its filled with Transynd??????

Straight off the GM website:




Ben

 

Our 07 I/H 4300 with a 1000rds came from the factory with dexronIII, the tranny ate the planetaries. The warranty replacement came with transynd.

Every truck I have towed or worked on that had an Allison in it that was filled or changed over to transynd is tagged with an identifier on the dip stick tube. Regardless of truck manufacturer. The 04 Pierce ladder truck I an assigned to has a C-12 Cat at 500hp with an Allison 4800evs transmission, it came filled with DexronIII. It was changed over to Transynd last year and a tag added to the dipstick tube.


Tim

 

I will tell you what. I am tired of spending my time proving something I know as fact. Go Google all your info and report back. I have a little something for you.
Another thing I find funny is how you say a 6.6l is not strong enough for a 5-7 chassis but the 8.1l gas engine is?

Hint: GM is trying to phase out CAT to use "in house" power. It makes it a lot easier to design and fit the tier IV SCR emissions. That would only leave the 7.8l as a diesel and a 8.1l for the gas market. Since light duty diesels (CAT) outsold the heavy version (7.8l) by a large margin..... what would they use as a replacement?

 

Holy moly the estrogen! I thought this was a Diesel truck site, not a horomone movement!

Get the facts... post them with reference. Be nice. Neither one of you will be happy till one of the other is dead....


I've talked to both of ya's... and you're both cool... Don't make me....

Still love ya long time...

mad

 

I'm grabbing popcorn... This one is pretty good....

 

Holey smokes, all I wanted was a little info on a truck I am thinking about buying.

I'm heading down to the lot today, I'll pull the manuals and see what engine is in it. Perhaps we can get the discussion back on that track

Peter

 

Peter, you do it, I'll ref it. Just let me know...

Mark