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Hydrolocked, big repair ahead.

C

Coug

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So DEX II was replaced by DEX III in all applications a long time ago.

Then about 20 years ago they came out with DEX VI

Not long after DEX VI came out GM started having an increased failure rate in transfer cases and gearboxes. They put out a bulletin that basically says that DEX VI should be used only in automatic transmissions, where it is fully backwards compatible, but in all other applications you should use their "manual gearcase oil" or DEX III. The manual gearcase oil was just relabeled DEX III


In the newest version of the HMMWV the military says to use DEX VI in all systems that use automatic transmission fluid. That makes sense for the military because having a few gearboxes or pumps fail is simpler to deal with that multiple transmission fluids in inventory, and worrying about some dumb private grabbing the wrong one.


I personally run DEX III in my power steering.
there are plenty of people that flushed the power steering system and run power steering fluid.
 
Gcelevator

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Coug said:
So DEX II was replaced by DEX III in all applications a long time ago.

Then about 20 years ago they came out with DEX VI

Not long after DEX VI came out GM started having an increased failure rate in transfer cases and gearboxes. They put out a bulletin that basically says that DEX VI should be used only in automatic transmissions, where it is fully backwards compatible, but in all other applications you should use their "manual gearcase oil" or DEX III. The manual gearcase oil was just relabeled DEX III


In the newest version of the HMMWV the military says to use DEX VI in all systems that use automatic transmission fluid. That makes sense for the military because having a few gearboxes or pumps fail is simpler to deal with that multiple transmission fluids in inventory, and worrying about some dumb private grabbing the wrong one.


I personally run DEX III in my power steering.
there are plenty of people that flushed the power steering system and run power steering fluid.
Click to expand...
.....but with what you just said, then it is better to run dex III in the transmission as well, correct?
 
C

Coug

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Gcelevator said:
.....but with what you just said, then it is better to run dex III in the transmission as well, correct?
Click to expand...
The transmission will do fine with either DEX VI or DEX III. They will both work the same for you.
The only real benefit is only having to keep one spare fluid on hand rather than two or three different ones.
 
TOBASH

TOBASH

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The point is also to protect from dust and ambient humidity
 
C

Coug

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as long as it shows oil pressure and it goes up and down with engine RPMs.

Don't trust the gauges to be accurate, just keep an eye on how they behave,, and if they start acting differently then worry.

As long as the fan kicks in, temp drops 10-20 degrees then kicks off again, then cooling system is probably good.

(my first oil gauge read 0 at hot idle, and never got above 30. Second one with new sender read about 20 hot idle, and 50 high RPM. Current sender reads about 30 hot idle and 60-65 cold oil at moderate RPMs.)
 
Gcelevator

Gcelevator

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Coug said:
as long as it shows oil pressure and it goes up and down with engine RPMs.

Don't trust the gauges to be accurate, just keep an eye on how they behave,, and if they start acting differently then worry.

As long as the fan kicks in, temp drops 10-20 degrees then kicks off again, then cooling system is probably good.

(my first oil gauge read 0 at hot idle, and never got above 30. Second one with new sender read about 20 hot idle, and 50 high RPM. Current sender reads about 30 hot idle and 60-65 cold oil at moderate RPMs.)
Click to expand...
Yes, was planning to use a mechanical manometer to double check.
 
Gcelevator

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is there any reason why the serpentine belt (MSN 3030-01-524-2460, RD-5-11792-0) is squeaking at less than 3k miles? when i installed this engine, i made sure to installa new belt at 22 miles, at around 2,500 miles i repalced the belt because of this symptom and now at around 4500 miles it is squaking again. any other brand belt that lasts longer out there? for more info, the belt is not destroyed or worn out on the edges or similr, it is just on the back face (opposite to the groves) where is showing signs of wear.
 
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