Thank you for the donation.
The description of the symptoms are not clear for us to understand the situation and I would like to know the following.
1. Struggling to get to highway speeds.
Can you explain in more details?
Is engine revving but vehicle speed is not increasing fast enough?
2. Not shifting properly. Do you mean the shifts are delayed?
Apart from above :
3. Is the Check Engine Lamp indicating while driving?
4. Do you have any noticeable components that is not functioning? Eg, speedometer not working etc.
5. Did you check the transmission fluid?
6. Was any repairs done prior to the problem occurring?
7. Is there anything that you think might help us to understand the problem?
My feeling after reading your question is that the problem is more likely to due to engine rather than transmission.
Saturday, January 9th, 2010 AT 11:58 AM