[MASTERBrian]

Several days ago I noticed a burnt smell and I have been trying to diagnosis it. Thought either trans or brake as it was only on driver side rear and I just replaced those pads. Fast forward to this past weekend I was heading on a 5 hour road trip and part way in I got code P0894, which says slippage. I cleared it to see if it'd pop back up and it stayed off for several hours then popped up one more time on the drive out. It appeared two or three more times while gone and on way home. Every time the code appeared it was at hwy speeds, BUT it did shift hard after coming off hwy several times. I also recall it shifting really hard a few times the previous weekend, thought maybe a fluke.

The crap part of this is the trans was just rebuilt back in April/May 2017. Warranty was only 12mo...prior to that I had it rebuilt 2-3 years prior. Both different shops. I checked the fluid and I think it looks high, I haven't added AND I know either the trans shop checked it or another shop checked once and it was ok, so curious about that.

I plan to take her to one of my mechanics, I do lots of own stuff but for things I don't like I use this shop. They may recommend going to a trans shop, which I might also do....BUT getting Leary of rebuilds. My guess is a bad solenoid body, because I have a 99 k1500 burb that does a similar hard kick AFTER hwy speeds and I wss told a year or two ago that was it's issue....around town it's fine, so I've let her go as I just use it for lumber yard runs and as a spare. I figured I'd replace the trans when it went out or when my oldest starts driving.

The 03 has been my main driver and it's still a great truck other than these darn transmissions. My understanding is same trans in both? Any chance it's because it might be too full and a flush and filter change might solve? I'm worried if they drop the pan they'll see damage and won't go further without a rebuild. That's where I'm unsure what to do. My neighbor swears he put a factory gm new trans in his 98 Silverado several years c back for around $1500 and got a great warranty, but I'm not seeing that. A salvage yard wants $300 and gives a 90 day warranty. I see summit and jegs also offer a decent deal but are remans.

Ideas? If solenoid, is it feasible to think just replace that and go down road considering out wss rebuild less than two years ago? I'm guessing that was 10-15,000 miles. Also, how much of a bear are these to do without a lift and for probably one man?

My other inclination is to buy a lower mileage 2013 burb and push this one to the backup car and plan on giving to daughter in year when she starts driving in about a year or so and do the trans at that time.