Whoo-Whoo coming

[Cummins12V98]

Someone on another Forum said the AISIN fluid is not Synthetic and that is why there is a short timeframe???

 

[HVAC2]

High RPM? It's right against the redline and is holding back 39k combined, more ROM's the more holding power. The truck performed exactly as it would have even if it had 8-10 speeds. Performance was exactly where it should have been with all three based on their power specs.

I am getting daily feedback as to how impressive the exhaust brake is on our 18. Its amazing, all these years and downhill was a always a bit of anxiety. We are up and down the Pacific coast and cross county 5 months annuallt, it just brings a big grin, same as passing on passes.

As far as TFL, I kinda smell a fish. They bought a XLT 7.3 Godzilla with 3.73 gears. Claimed a shortage and all they could find. Then magically they get a loaded up lariat with the 4.30 gears. The uphill test was nothing but praise and didn't even do a decibel test.

Ill stand corrected on all of this as running hard, but my conspiracy theory is Ford panicked when they saw the test unit they bought. They quickly provided the best chance for the Godzilla. Maybe a too cozy relationship on the diesels as well. Plus, although a bit entertaining, the overall results are poorly executed regarding consistency.

 

[AH64ID]

Someone on another Forum said the AISIN fluid is not Synthetic and that is why there is a short timeframe???

Ive said that. It’s one of my suspicions as to the shorter life. It’s a rather old trans spec, nothing fancy. It’s hard to find because most everything that used it is no longer made or switched to a more modern fluid.

 

[gsbrockman]

It’s hard to find because most everything that used it is no longer made or switched to a more modern fluid.

There must be a somewhat decent demand for it.

Mobil 3309 is all over eBay and Amazon.....and Summit.

A couple of clicks......and it’s on your porch in under 5 days on average. It’s never been an issue for me to source the 3309.

 

[gsbrockman]

At least in the Ram trucks the 8HP a "maintenance free" transmission. I'm not familiar with an A8. What service intervals does it call for?
The new 8AP version does have prescribed service intervals. They aren't published yet that I'm aware of but they are calling it extended service. Typically MD transmissions run at 100k miles or more on a service. Eaton makes a dual clutch automatic that calls for 10yrs/150k miles. This is vocational sector, and why I don't understand why Aisin calls for such short service intervals in a mostly consumer market.

Technically....it’s designated as the ZF 8HP70.
Guys over on the Challenger forum use “shorthand” in their signatures......and I guess I caused confusion here.
M6 equals manual six speed transmission.
A8 equals automatic eight speed transmission.

And...the RAM transmission is marketed as maintenance free transmission, but....it can be serviced.

https://www.cumminsforum.com/forum/...8hp-transmission-fluid-changes-nightmare.html

 

[Cummins12V98]

There must be a somewhat decent demand for it.

Mobil 3309 is all over eBay and Amazon.....and Summit.

A couple of clicks......and it’s on your porch in under 5 days on average. It’s never been an issue for me to source the 3309.

I get AMZ/OIL the next day.

 

[AH64ID]

There must be a somewhat decent demand for it.

Mobil 3309 is all over eBay and Amazon.....and Summit.

A couple of clicks......and it’s on your porch in under 5 days on average. It’s never been an issue for me to source the 3309.

Online only falls under the hard to find category for many. Personally I don’t mind that. Just pointing out why it might not be as common on retail shelves.

 

[TFucili]

Seven or eight quarts(??)of inexpensive fluid every 30K and a filter every other for a trans that will go several hundred thousand miles, even in heavy service? Sounds perfect to me.

 

[gsbrockman]

I get AMZ/OIL the next day.

Of course you do......along with your Grey Poupon.

 

[TFucili]

.....along with your Grey Poupon.

Does that work in an Aisin???

 

[gsbrockman]

Does that work in an Aisin???

I wouldn’t know......I’m poor and could barely afford to watch the commercials in years gone by.

 

[TFucili]

I wouldn’t know......I’m poor and could barely afford to watch the commercials in years gone by.

Add Grey Poupon, and it becomes a Spic(i)er transmission...

 

[gsbrockman]

Add Grey Poupon, and it becomes a Spic(i)er transmission...

#ad

 

[JR]

Technically....it’s designated as the ZF 8HP70.
Guys over on the Challenger forum use “shorthand” in their signatures......and I guess I caused confusion here.
M6 equals manual six speed transmission.
A8 equals automatic eight speed transmission.

And...the RAM transmission is marketed as maintenance free transmission, but....it can be serviced.

https://www.cumminsforum.com/forum/...8hp-transmission-fluid-changes-nightmare.html

Gotcha. I thought you were specifically referring to your car.
The point I'm making is this. Aisin markets their trans as a medium duty transmission. This means it technically should be used somewhere in the vocational market where miles add up fast, although I'm not sure what else it is used in. Imagine having to bring in a fleet of trucks every 30k miles for a trans service. It's simply unacceptable. Time is money and down time costs in multiple aspects....I'm sure you can relate. Standard intervals are 100k and more on current MD transmissions. This is nothing new or state of the art. This includes Allison, Eaton, Fuso, ZF off the top of my head. I realize the Aisin is pretty popular here on this site, but the short service intervals tell me it's just not up to par to the rest of the market. It really must degrade the fluid to require such short intervals. It's a sign of short comings. Like how the Cummins has been traditionally "easy" on engine oil compared to a 6.0 or 6.4 Powerstroke which shears the oil in short order.

 

[TFucili]

It would be very interesting to find another application where this same basic unit is installed, and see if the service interval is different.

 

[JR]

Technically....it’s designated as the ZF 8HP70.
Guys over on the Challenger forum use “shorthand” in their signatures......and I guess I caused confusion here.
M6 equals manual six speed transmission.
A8 equals automatic eight speed transmission.

And...the RAM transmission is marketed as maintenance free transmission, but....it can be serviced.

https://www.cumminsforum.com/forum/...8hp-transmission-fluid-changes-nightmare.html

Thats almost exactly how I service the "maintenance free" trans in my wife's car. And if the Valvoline max life is a viable alternative for the 8HP that's a pretty reasonable service every 100k miles or so. $4.50 a quart is quite economical.

 

[AH64ID]

It would be very interesting to find another application where this same basic unit is installed, and see if the service interval is different.

Me too. There could be difference thou, just like the ISB in our trucks and the ISB in true MD applications. We have the smallest oil sump size and our OCI reflects that.

The average pickup duty cycle is also very different than the average MD duty cycle.

 

[JR]

Me too. There could be difference thou, just like the ISB in our trucks and the ISB in true MD applications. We have the smallest oil sump size and our OCI reflects that.

The average pickup duty cycle is also very different than the average MD duty cycle.

You are right that we have the smallest sump out of any ISB/QSB. I don't know about commercial ISB but I am around QSB6.7's on a daily basis and they are all the same, 500 hrs. I'd have to look at the books to be sure but I believe they also say "or 6 months", although the few units that make it far enough on time alone get annual changes.

 

[Cummins12V98]

If they replace the AISIN it will be a "REAL" Allison, the one mentioned is currently used in MD applications and is a 9 speed.

 

[TFucili]

If they replace the AISIN it will be a "REAL" Allison, the one mentioned is currently used in MD applications and is a 9 speed.

The 1000 has been used in medium applications, and I wouldn't touch another one with a ten foot pole. It had better share ZERO DNA with that thing.