So my 07 Malibu VLX (300 hrs) seems to speed up then slow down when I am going over 25mph.. Its not extremely noticeable but I can feel it. Almost like its lugging down. Any Ideas? it has only started happening this season. which leaves me to think it is;
A) Trans fluid is running low?
B) Someone mentioned my prop seal (started leaking)?
Any thoughts would help.. I may need to change the spark plugs as a side note.. Its running a tad rough.