[hartmanjrp127859]

I just bought a cherry Enclave with only 28,000 miles. I love it but the transmission shudders between gears. Has anyone tried an additive like ProLong PSL15000 or a Lucas product for this problem. Does anyone think it's a bad idea to try it? It's a top rated tyranny additive but I don't know if I want to try it or go back to the dealer. Still on warranty so ...
Thanks

had my transmission went at 45000 miles it was recall on it, they cover the whole thing, check the recall list