i think its my transmission.

[FLATACID]

i think my transmision is going to go out on me. i noticed 2 things that where different yesterday. 1. when i would put my cruise control on in 5th, it would start to accelarate, then let off, then start again. it would do that about 5 times. 2. when my speedo was doing 80 in 5th, my rpms would be at 2000. i have 3.08's and there usally at 2150 at 70. to me this sounds like the transmision is spinning faster than normal. i did just put some 16 inch ponys on the back but i wouldn't think that would make a difference. it feels notchier than normal and i just feels roughier than normal. any suggestions would help.

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mods:
dumped ultra flo's, moroso air intake, frpp underdrive pulleys, florida 5.0 guages, 3g alt