Transmission is slipping?

Honestly, the first thing you should do is to check the fluid and checking out these guides which can help us

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

and

https://www.2carpros.com/articles/automatic-transmission-problems

This video shows how to replace the unit in a similar car.

https://youtu.be/3vJAojsrfuU

most likely time for the trans to slip is when the OD is on. THat is when the transmission is under the heaviest load. If they are slipping, there really isn't anything to do other than do a general overhaul with new clutch plates.

I wish I had better news, but that really is the only option. If you want to try to save a few bucks, you may be able to find a good trans in a salvage yard. But then you'll lose the warranty they are offering you which is good.

Let me know if you have other questions, and thanks for using 2carpros.com.

Joe

It sounds like it but we should service the unit first and pull the codes. Here are two guides to help us get started:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down these guides and report back.

From your description as well as miles on vehicle I would say it is a transmission. What has happened is the clutch paks are worn or the seals are bad. I would bet that the transmission fluid is either dark brown or black which is not a good sign at all. I have never seen the additives rarely work to fix things and normally it is too late for that anyhow.

Good morning,

I would start by changing the fluid and filter in the transmission. If the filter is clogged it will cause this exact issue.

https://www.2carpros.com/articles/automatic-transmission-problems

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy

Fluid Pan, Gasket and Filter
1. Normal maintenance requires periodic automatic transmission fluid changes. If a major repair, such as a clutch, band, bearing, etc., is required, the automatic transmission will also have to be removed for repair. At this time, the torque converter, transmission cooler and tubes must be thoroughly flushed to remove any dirt. The transmission fluid needs to be changed if evidence of fluid contamination is found. When used under continuous or severe conditions, the transmission and torque converter should be drained and refilled with fluid as specified.

2. CAUTION: Use of a fluid other than specified could result in transmission failure.

Refer to the vehicle certification label affixed to the LH front door lock face panel or door pillar for the transmission code.
3. When filling a dry transmission and torque converter, refer to Specifications for capacity. Check the fluid level.

Removal
1. Disconnect the battery ground cable.
2. Raise and support the vehicle.
3. Place a drain pan under the transmission fluid pan.

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4. Drain transmission fluid.
Loosen the transmission fluid pan bolts and allow fluid to drain. After fluid is drained remove the bolts.

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5. Remove the (A) transmission fluid pan and (B) transmission fluid pan gasket.

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6. Pull down evenly and remove the transmission fluid filter, seal and filter kit.

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7. Remove torque converter housing plug.

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8. Remove the torque converter drain plug and drain the torque converter.
Rotate the crankshaft to access the drain plug.

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9. Clean and inspect the (A) transmission fluid pan, (B)transmission fluid pan gasket and (C) magnet.
10. Flush the fluid cooler tubes.

Chances are the trans service won't help. On the other hand, does the trans slip once it is fully into 3rd or 4th gear? If not, most likely the 3-4 shift solenoid is going bad and causing a slow / soft shift. Have that checked first.

As far as the other trans, yes the tail housing needs changed to fit the transfer case, but I don't recommend it. The newer trans is designed differently with different sensors and design. Chances are the sensors from the old transmission won't work. Also, we only recommend direct fit parts because of the problems that occurr when you change from year to year.

Make sure the fluid is full and clean. It should be a translucent pinkish color. Also, have you ever had the transmission serviced? Finally, has the check engine light ever come on?

Based on your description, it sounds like one of the clutch packs has worn and causing a slip, but let me know about the questions I asked. Also, when you check the trans fluid, see if it has a burnt smell to it.

I dont seee any bulletins on the 1-2 upshift being harsh, just for a delayed 2nd gear. Im not a transmission guy, but it could be a sticky accumualtor or shift solenoid that is going bad. A good trans shop should be able to figure it out without having to go to the dealer