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Not sure if this discoloration is normal between the teeth on pinion gear? Truck didn't seem to be shifting properly pulling 28ft toy hauler on big hills. Trans temp always seemed normal. Just changed the rear differential oil at 17000 miles with AMS Severe Gear 75-90 and seems to be shifting...

I have had the same starting issue several times as well. Sounds like its running on 3 instead of 6 cylinders. The paint is flaking off of my read differential cover in big 1 inch chunks. Less then 1 year old with 7,000 miles. My diff oil was full so I don’t think heat is the issue just poor...

Day at the dealership Got a little warranty work completed. EGR cleaning, new valve, and unknown sensors. Shutter and stutter gone. I still don’t get it…. .

info I have a 6 speed manual transmission 4x4. Thinking the 68RFE is an automatic.

Error code today P0401 I just got a P0401 code today. Think exhaust gas recirculation. I already got G30 awhile ago and got the latest updates a few weeks ago. This included some new sensors, software patches and 50 feet of fiberglass??? exhaust wrap. Around the pipe and sensor. Thinking it...

When I decelerate in 4th gear dropping my RPM’s to 1900 my engine hesitates or pulses. I can hear the drive shaft banging like I’m popping the clutch in and out. It goes away if I take my foot off the diesel or step on it. I think it happens in other gears as well. Any ideas on my engine...

Any new news on Bio?