6.9 diesel c6 transmission. ok when im driving it seems to do fine but when I get to a hill it bogs down the engine revs high and im going about 20 mph up this hill transmission was rebuilt a year ago 30000 on original injectors and pump it also smokes white/blue Thanks

 

Have you checked your fuel filter? Also how are your coolant and oil levels?

Depending on how that filter comes about, I would pull my injectors just to take a look at them, if they are the original then definitely replace them, if they are all around corroded and wet tipped, then I'd also replace them , but with new injectors it's usually a good idea to replace the IP (In the middle of this myself, currently waiting on my injector pump they said 3 weeks )

 

Well on the drive to the mechanic and the wayback it had no power but on the hills its bad it takes all its got to get up the hill. I maxed out the fuel pump and most of my blue/white went away but have not road tested it yet. the transmission was rebuilt but the shop did not replace the pan gasket so i replaced that and the shop put a modulator valve from a c6 mustang on it. guy at a different transmission shop told me to check linkage and governor. and the truck has a turbo on it

 

You maxed out your pump VIA the triangular plate on the side?? Not a good idea , But if that helped with the issue, then I would definitely check out injectors, currently looking into making a pop tester for mine since I'm bored out of my mind

 

yep I turn it up via the side. but this problem has been before I maxed it and it has a turbo. LOVING THE COAL BUT ROLLIN SLOW

 

Just tossing this out there do you use fuel additives? I would try pulling my filter, filling it with some seafoam then running it for about 2 minutes, then let it sit over night

 

No the only additive I use is marvel mystery oil i'll try the seafoam Thanks i'll post back

 

Fill the filter, and toss the rest of the bottle into the tank. Then try using some type of fuel additive such as lucas, I've tried mystery oil, it didn't work for my fuel in the diesel but worked in my gasoline vehicles may be just me though

 

if the engine is revving while your going up the hill .... sounds like your trans is slipping and that's the issue .. engine running fine .... in park .. does it rev right up and hold it at 2500 rpm's ... does it stumble or does it run smooth .... get back to me ... ( don't rev it up cold ... wait till warmed up ) .. get back to me .. will work this out

 

Check out the fluid inside the tranny, if it smells burnt, drain and refill. A worn out tranny would start would start slipping as it goes up hill which would be what you're having. One the lighter side, the C6 is a very simple transmission to rebuild if needed