Aisin behavior question

[Flash1034]

Well, I'm on my first road trip with my new truck. Running great and getting 18.8 mpg with only 2300 miles on her (empty).

Today in Utah, I noticed when I was going up mild grades at 83+ mph it felt like the torque converter was unlocking and locking. I noticed the tach going up and down about 4-5 hundred RPM too when it happens. Normal behavior to maintain speed?

What do you guys think?

 

[SnoKing]

Press the minus button on the shift lever to get the gear selected to show up at the bottom of the EVIC. Set it to allow 6th gear as the highest gear. Then you can watch to see if it is shifting to 5th and back on the hills. To the right will Highest allowed, and to the left the actual gear in use. SNOKING

 

[Cummins12V98]

Try running with EB and TH BOTH on.

 

[Flash1034]

Ok. It was in fact searching between 5th and 6th...all is good.

 

[Deleted member 995608]

What Cummin12v98 said........exhaust brake / tow haul on all the time. Makes driving an auto transmission a pleasure to drive.

And,..... thanks for the springs and shocks! I got them yesterday.

 

[RustyJC]

Well, I'm on my first road trip with my new truck. Running great and getting 18.8 mpg with only 2300 miles on her (empty).

Today in Utah, I noticed when I was going up mild grades at 83+ mph it felt like the torque converter was unlocking and locking. I noticed the tach going up and down about 4-5 hundred RPM too when it happens. Normal behavior to maintain speed?

What do you guys think?

For the first time, I noticed my truck shuffling gears between 5th and 6th. This occurred while towing the 5th wheel with cruise control engaged at 65 MPH at higher altitudes between Albuquerque and Kingman, Arizona. For no reason the Aisin would drop back to 5th for about 1 second and then upshift to 6th.

I understand that there is a TSB and reflash that addresses this. I'll be following up with my dealer when we get back to Texas.

Rusty

 

[Flash1034]

Please post the TSB number when you get it done. I may as well do it too.

Thanks,

 

[Vette Racer]

For the first time, I noticed my truck shuffling gears between 5th and 6th. This occurred while towing the 5th wheel with cruise control engaged at 65 MPH at higher altitudes between Albuquerque and Kingman, Arizona. For no reason the Aisin would drop back to 5th for about 1 second and then upshift to 6th.

I understand that there is a TSB and reflash that addresses this. I'll be following up with my dealer when we get back to Texas.

Rusty

Welcome to my world Rusty, the TSB fixes it!

 

[Flash1034]

My truck is new. You'd think it would have already come with the TSB updated software....?

 

[Flash1034]

For the first time, I noticed my truck shuffling gears between 5th and 6th. This occurred while towing the 5th wheel with cruise control engaged at 65 MPH at higher altitudes between Albuquerque and Kingman, Arizona. For no reason the Aisin would drop back to 5th for about 1 second and then upshift to 6th.

I understand that there is a TSB and reflash that addresses this. I'll be following up with my dealer when we get back to Texas.

Rusty

Thats exactly what mine was doing....FYI. Let us know if your dealer has a TSB fix.

 

[KPear]

Does anyone know where to find TSB's, either on the NHTSA or the Ram website?

 

[Newsa]

Well, I'm on my first road trip with my new truck. Running great and getting 18.8 mpg with only 2300 miles on her (empty).

Today in Utah, I noticed when I was going up mild grades at 83+ mph it felt like the torque converter was unlocking and locking. I noticed the tach going up and down about 4-5 hundred RPM too when it happens. Normal behavior to maintain speed?

What do you guys think?

I realize that most of you are getting the TSB that fixes this. But i was just curious if the syptoms were transmission shifting flashes or just shifting without (much) flash. I was noticing the 400-500 RPM change in this description. And that sounds like about the difference between sequential gears. Except i would expect the difference between 5th & 6th to be a bit less since both are overdrive gears.

Just curious. Thanks in advance for your reply.

 

[Flash1034]

I realize that most of you are getting the TSB that fixes this. But i was just curious if the syptoms were transmission shifting flashes or just shifting without (much) flash. I was noticing the 400-500 RPM change in this description. And that sounds like about the difference between sequential gears. Except i would expect the difference between 5th & 6th to be a bit less since both are overdrive gears.

Just curious. Thanks in advance for your reply.

In my case you are right...my truck is hunting between 6th and 5th during high speed runs, at altitude, going up inclines. Would be nice if it picked a gear and stayed with it. Is there a TSB for this behavior?

 

[SnoKing]

In my case you are right...my truck is hunting between 6th and 5th during high speed runs, at altitude, going up inclines. Would be nice if it picked a gear and stayed with it. Is there a TSB for this behavior?

Stop by a dealer and ask them?

 

[Flash1034]

I was hoping one of my TDR brothers would know..as I typically avoid going to the dealer for anything unless I absolutely have to.

 

[SnoKing]

I was hoping one of my TDR bothers would know..as I typically avoid going to the dealer for anything unless I absolutely have to.

Well one of the brothers(?) is not going to reflash your truck. If you want the hunting fixed it is going to have to go to the dealer. You could PM your vin to Bob4x4, he might take a look see for you.

 

[KPear]

I was hoping one of my TDR bothers would know..as I typically avoid going to the dealer for anything unless I absolutely have to.

the NHTSA used to have a way to search for TSB's by year, make and model, but their website has recently changed and I can't find that search function anymore.

Does anyone know of another site that can pull up TSB data for vehicles?

 

[KPear]

Well one of the brothers(?) is not going to reflash your truck. If you want the hunting fixed it is going to have to go to the dealer. You could PM your vin to Bob4x4, he might take a look see for you.

Seriously? Why are you giving him grief? He's asking for the TSB # so he can go into the dealership armed with the right information. It's not an unreasonable request on his part.

 

[SnoKing]

Seriously? Why are you giving him grief? He's asking for the TSB # so he can go into the dealership armed with the right information. It's not an unreasonable request on his part.

And you missed this? "You could PM your vin to Bob4x4, he might take a look see for you."

 

[Flash1034]

If you don't want to be helpful Snoking...just go away and don't respond.