no i believe that service on the tranny is at 50,000? that'* when it calls for fluid and filter.

Just checked on MyGMLink.com where I have my SSEi registered and it doesn't call for transmission fluid/filter until 100,000 miles or (in my case) by 11/30/2008!

However, my service manual does specify changing the transmission fluid/filter every 50k miles if you drive...
None of which I would consider my daily commute so I feel it would fall under the last part. I'm all for preventative maintenance and all, but I have followed manufacturers schedules to a 'T' on pretty much all of my vehicles and have never had a problem.

Your driving conditions may be different from mine, and by all means, do whatever you need to do to keep the costs down. I am simply going to let the dealership handle it because that is why I purchased the extended warranty.

For

I had my transmission serviced by the dealer at 40K miles. When the torque converter blew, the first thing the dealer tried to do was imply that I had not properly maintained the car. Then I pulled out my copy of the the work order showing they had done the transmission service work themselves....and earlier than the 50K recommended schedule. They became very nice after that.

Ok, something worth noting. For the past 2 months, this problem has been growing on me. One thing was a constant over this time period, up until Friday and that was where I was purchasing my gas. I had been getting gas at the local Tops gas station. It wasn't until a fellow car pooler and I were talking on the way in to work this morning that we put 2 & 2 together. He had also been getting gas at the same Tops for quite some time, both of us where doing so because it was always atleast 5 cents cheaper than everywhere else. He had been experiencing the same problems with his '00 Blazer (4.3L). At the end of last week both of us filled up at stations other than Tops. Today we were talking and neither of us were still experiencing the shuddering problem anymore.

It'* kind of weird, but worth a try. jayare627, go buy some gas from a different station for a tank or two and let us know what you experience. I believe that bad gas (or water in the gas) could cause these exact symptoms because the range of 40-50mph is where the rpms are the lowest they will be at with mild throttle. It also is the speed where the torque converter will stay engaged for as long as it can to save on fuel. If the engine is missing it would be very noticeable in this range.

Give it a try. If it doesn't work out, then no harm, but if it does, it'll save you some money!

You guys had gotten me worried and my car is currently at the dealership getting checked out. And ofcourse, because I filled up Friday on my way home, I didn't experience any issues, but some other things needed checking into so I kept the appointment. They didn't find a thing wrong with the transmission with the scan tool or by driving it.

Would a torque converter problem show up on a scan tool?

Not a bad idea and sounds like the cheapest alternative I have right now. Between the new struts in the front and mounts, and the possible tranny problem I don't even know if I can keep the car anymore after that bill.

Thanks I'll try that!

Just curious...what was the outcome on your transmission problem? Was it really a problem, or was bad gas the culprit?

Jim

I did try different gas as was suggested, it did seem to lessen the problem but it'* not totally eliminated...I'm gonna try one more tank and see.

I tried the other tank of gas, no help. The car is back at the dealership along with all the lightning strike related problems I am having. I told them just to go through the car and see what needed to be replaced, they said it would take a few days? I'm starting to get really annoyed by this.....but i did see a nice GXP the other day at the stop light next to me the are nice lookin!!

i have the 2000 bonny also. it has 48,000 miles on it but i bought it back in december. i haven't noticed any shudder from the tranny but who knows that could have been the reason for the original owner to sell it and had the dealer fix it before i bought it i'll never know. right now my only problem is the broken tranny mount in front of the radiator. but after this weekend that will be fixed and changed too a solid mount, then i'll probably be able to feel the shudder if there is one

MAN! i love this site,
cliff

It won't feel much different with the solid mount. You still have a rubber isolated subframe between you and the engine.
The subframe is what is going to flex now.