Hi Scotty,
I have a 2015 Toyota 4runner with 91k miles (bought used at 62k) and am worried a transmission-related issue may be starting to show. The issue is when I initially start the car and put it into reverse, it acts as if it is still in park. Granted, this has happened probably three times in the last 8 months but want to be proactive and address or remedy it now to hopefully prevent any further issues. It happened this morning where the car was in reverse but did not move - I lightly tapped the gas and heard a ‘thud’ but afterwards it acted normal and I could not recreate the problem. Also want to note that I’ve never observed or noticed any problems when shifting or while I am driving - just the initial start.
Any suggestions on what I could do to keep everything running as smooth as possible based on what I occasionally experience? I wondered about flushing the transmission fluid but I see mixed opinions on that and certainly don’t want to make anything worse.
Thank you in advance for your help!
It may be a transmission problem. When did you last change the fluid and filter? I have seen this also when a brake caliper piston sticks on the rotor then lets go with a thud sound when you start moving. Check you brake system too.
Really appreciate the response. That actually makes sense, the first time it happened I thought my e brake was stuck. Had warped rotors and recently replaced all of them, brakes still squeak in the rear but the mechanic says my brakes are perfect so that is an interesting point. Would replacing the calipers be my best bet?
I have not done anything with transmission fluid/filter since I’ve owned it and not sure if it was ever done before. You think a flush and filter would be a good idea anyway?
Do not flush, just change filter and fluid, it's probably way past due. I would rebuild the calipers, not replace them. It only involves a few parts and the bores and pistons can be cleaned up, with new o ring seals and dust boots. Also, check your parking brake linkage. It can get crudded up and needs some routine cleaning and lubrication, especially if you have a cable operated system. Good luck!
Thank you again! This really helps me out!