Today I started my truck, let it warm up for a couple of minutes. Drive it bout 2kms and put it in park. When I did that it started shaking really bad. Only in park did it do that. So I drove it home and it stopped doing that, but started doing that in reverse. Possible cause of it? Now it's just in reverse that it shakes and idles rough in that gear. 1999 jimmy sle 4x4. I was in 2wd the whole time.