Leaderboard

I like @Mopar1973Manput 50 SAE trans oil in my 5 speed after a recent rebuild. So far I'm happy with it. I do notice it being a bit thick on cold morningmore start the engine (clutch in) and let her run til the oil pressure builds the release the clutch and let the oil in the trans circulate a minute before I take off. It don't take long to notice the oil in the trans has warmed a bit.

I don't completely disagree agree with you @Tractorman, the oem injectors will run a long time. To a person that owns one for a long period of time the change would be minute. The big issue long term is that if an old injector were to fail in a worse fashion it would suddenly dump fuel like mad into a cylinder and wash it out scarring the walls and wiping out the rings. Now there is a rebuild needed. Alot of what we do is preventative maintenance. These engines will last a very long time if cored for and the warning signs taken seriously. Not saying that this scenario will be on every injector at a given milage but it does happen. The prevention is worth the expense. Back to the OP's original issue. I see that he has an H.O. vp44 pump. Could that have an impact on the timing changing as he states? @Mopar1973Man may be able to answer that, myself I don't know for sure. Just a thought.

I ended up just getting some AGCO 75w-140 from work. Says it eliminates LSD chatter, so we'll see if I need to add additional Friction modifier. I run CAT in the engine, but only because I work at a Cat dealer and get it for cheap.

As long as it meets the specification there is no reason for expensive oils. I've stopped chasing high dollar oils a long time ago when a member @dorkweed went 84,000 miles on a single oil change using Walmart SuperTech engine oil and was doing Blackstone test every 7k miles and continued to keep passing the test with flying colors. I use 80w-90 petroleum in the axles (open diff), 50 SAE trans fluid (syn GL-4), Dextron ATF in the transfer case. I save money this way and 481 k miles later no issues now that fixed all the damage stock 75w-80 did to my transmission. Transfer case doesn't require ATF+4 syn oil so Dextron works just as well. Yeah call me crazy but closing in on 500k miles...

Thanks @Mopar1973Man, I couldn't have explained it that well.

Specs according to Dodge FSM Minimum pop pressure 293 bar (4,250 PSI) Maximum pop pressure 327 bar (4,750 PSI) Set pop pressure - 310 bar (4,500 PSI) Then the engine load has hit zero because the pop pressure is too low and the ECM no longer can control the set idle speed being the injectors are popping open too early and too long and idle control is lost. If all 6 injectors were pulled you find when tested like mine at 150k miles DAP tested mine and they were at 850 RPM and zero engine load which brought mine down got 240 to 260 bar. Which is unusable timing is totally off and too advanced in timing. Hence why when I had these 7x0.010 injectors built I opted for 320 bar for longevity and better spray. So far I'm still idling at 800 RPM at about 6-7% engine load so the injectors are still within timing and not popping open too early. Like I'm learning with Quadzilla tuning 290 bar injectors are a PITA being they are right at the breaking point of failure and over-advanced by about 4 to 5 degrees and require a tune that is retarded. My tune has to have more advancement being I'm set above 310 bar so I've got to add more advancement being I'm about 2 to 3 degrees retarded. All are based on the 310 bar set point of where the timing will be.

I have heard the same, but it has never worried me. I believe there is a marginal sized oil passage for a particular bearing (not sure which one) that can starve that bearing for oil. I have a NV5600 that has logged 386,000 miles with no issues and I tow up to 21,000 lbs up 6% / 7% grades in hot weather. The only work done to the transmission was to replace the rear seal at 297,000 miles while I had the transmission out when I replaced the first clutch. I do make sure the oil level never gets low and sometimes even overfill it, just because of the above-mentioned oiling issue. I would place a lot more trust in a NV5600 or a G56 than I would in a NV4500 even after modifications were done. Beside, the extra gear is worth a lot, as well. - John