Problem is, a guess either way results in money that might not have needed to be spent. I had my trans rebuilt, since they are common for issues anyhow. Only a good trans shop can really tell you. This isn't an area I'd even try to DIY without some diag/trans rebuild background for support.
If you have a scan tool, you can check for TCM faults. However, if there was an issue once already, there may be something more sinister going on. If codes are present, you know the TCM is doing (some of) it's job.
Really simple...spend 1/2 the cost for the computer and have it properly diagnosed. Then you can take the steps to fix yourself if you choose.
Last edited by RTLee; 03-23-2013 at 06:22 PM..
Reason: Ipad spelling issues...