Transmission issue

[Piranharaptor]

I just had the gasket replaced last week. My problem is that I've never really driven the rig any distance. It had 2k when I discovered the trans leak. After after 175 miles today on cruise at around 75 it started shifting hard up and down. The digital gauge showed 215 or so. I was worried. After re start it ran at 190 for another 100 miles. On the drive home it started shifting really hard and again went over 200. When it reached 235 degrees I pulled over. After just a few minutes the digital gauge read 217. I said f it and re started. As soon as I started driving it cooled and dropped under 200 degrees. Ran and shifted great all the way home (200 miles). Already talked w service dept and I'm dropping it off in the am. Just wanted to research it here to see if anyone had an idea. Another issue is I'm planning on driving it on a family vacation in a couple if weeks for around 2500 miles. Just don't want any issues. Thanks for any useful info...yes Sasquatch it's a *************. But I have an extended warranty, wife is an attorney, and it a bad ass truck. Things will work out.

 

[jabroni619]

yes Sasquatch it's a *************. But I have an extended warranty, wife is an attorney, and it a bad ass truck. Things will work out.

Living the life!

 

[Crash33]

I wonder if it got hot and caused issue... or if it had issue which caused it to get hot?

 

[Piranharaptor]

It was obvious that it shifted tough as soon as it reached 205 or so. Everything is great under 200. It's at the shop now. I will update.

 

[Ltl6pack]

Found a trans leak at 2k. Had it in shop last week and they changed the gasket. Drove it around 50 or so miles and all was good. On a road trip today and about 160 miles in it stared shifting hard from 10th to 7-8-9. I noticed that digital temp read 212-215. The analog gauge was centered. I stopped and ate for about 15 min. Back on road and it's under 200. Shifting fine. Any ideas?

Can I ask if you did the temp read out your self with Forscan, or had someone else do it? What was the temps before the oil change?

 

[Piranharaptor]

I just read the digital display on dash...not sure what is was before they changed gasket. it has to be something with the fluid (high or low)

 

[ogdobber]

It was obvious that it shifted tough as soon as it reached 205 or so. Everything is great under 200. It's at the shop now. I will update.

should shift fine all the way to 240, although thats really hot. max you should see is ~220. you are definitely low on fluid. 200-220 is normal temps (when towing) however best is to keep at 180 for max life

 

[Sitdown]

For anyone finding ATF leaks, and having difficulty finding the source, it may be coming from the overflow.

After a several days of good abuse out in octillo/mojave in higher weather temps, I had zero issues. Following day on highway in cruising traffic up hill, trans sputtered a few times, began sprinkling atf onto truck behind me and look down to see temp rose to 248*. No codes or faults were triggered at the time. Stopped for 30-60mins to find issue, and eventually determined source from overflow/vent. Decided to limp truck to next destination, but issue cleared itself and had no trans temp issues the remainder of the trip. Had 2 other gen2's in group with forscan (digital temp #), and all were consistent throughout the next few days. Hope to learn more about this going forward. First real hard offroad trip in the new truck, and must say the trans performed excellent.

I did also learn its quite difficult to source the new ULV ATF

 

[Piranharaptor]

For anyone finding ATF leaks, and having difficulty finding the source, it may be coming from the overflow.

After a several days of good abuse out in octillo/mojave in higher weather temps, I had zero issues. Following day on highway in cruising traffic up hill, trans sputtered a few times, began sprinkling atf onto truck behind me and look down to see temp rose to 248*. No codes or faults were triggered at the time. Stopped for 30-60mins to find issue, and eventually determined source from overflow/vent. Decided to limp truck to next destination, but issue cleared itself and had no trans temp issues the remainder of the trip. Had 2 other gen2's in group with forscan (digital temp #), and all were consistent throughout the next few days. Hope to learn more about this going forward. First real hard offroad trip in the new truck, and must say the trans performed excellent.

I did also learn its quite difficult to source the new ULV ATF

my rig is still in the shop. they called and said they are still trying to figure it out. any idea what is causing this? if it was overfilled why does it seem to reset after restarting it. mine didn't have enough time to cool. it was at 217 as soon as it restarted it began to cool down. stayed at 190 for the next 150 or so miles. thanks in advance for any info.

 

[Sitdown]

Initially overfill was an idea, but the assy line nowadays is pretty precise and automated on qty due to bean counters determining x amt variance = x million $ over a production cycle. That, and in ~5k miles, this was the first occurrence that i've noticed. Figured it would have shown its face during one of the abused days prior.

Right now i'm chalking it a new equip bug/fluke/air pocket? etc situation. It will be going in to dealer next week, will have them confirm fluid levels and maybe drop pan.
Even if shavings are found in the pan, not eager to let them tear into it or try to get a new trans (probably on backorder). I've read of people with trucks at dealers for weeks diagnosing similar scenarios. If more info comes to light, they can tear into it but it runs fine currently and under warranty if it does grenade later...