I recently had my engine swapped and figured I may as well have the tranny swapped while they're at it (old one was slipping). I took the car in today to have its first oil change and a flush. I asked if they'd take a good look at all the other fluids since it was just swapped. The guy came up to the window with my tranny dipstick and pointed out that there is metal shavings and the fluid is almost as clear as water.

I should also mention that the car overheated while they were doing the flush. I have never had any overheating problems before but also have never idled with the rpm's up so long before. I'm not much of a mechanic but I know there are coolant lines that go to the transmission right? Could the transmission have caused this by any stretch of a chance? I figure it's probably a temp sensor. No coolant loss so it's not a blown head gasket.

Otherwise, the only problems I've had with the transmission is it shifts slow on a cold start and if I really hammer on it from a stop it will slip until I ease up on the pedal. Does it sound like I am in for future transmission problems? I am afraid of having the fluid changed as I have heard that the metal shavings on a high mileage transmission can actually provide friction and prevent slipping.

It is an automatic 4-speed transmission.

Am I correct in saying from what I read that they did flush the replacement tranny out? If so, and you did say your old one was slipping, flushing should not have been done. What they should have done was dropped the pan, checked for metal shavings/ pieces of bands. If so, your trans is on it's way out. Although a small amount of fine greyish matter in the pan on a higher mileage trans is fine, normal wear. If that was found,they should have changed the filter and refilled with new fluid. I'm not a fan of trans flushing machines. their fine for low mileage vehicals with good transmissions, as long as it's done on a regular basis, but otherwise, no. Im assuming they flushed it because you said "the fluid was clear with metal shavings in it''. Did you say you are having shifting problems/ slipping with the replacement trans? Another very important point. Whenever a trans is replaced,you should always pull the pan check it out and replace the filter before installing it. Also does't hurt to replace the converter. One last thing. ALLWAYS blow the tranny lines out with compressed air to get any metal shavings out of them so they are not pushed into the new transmission.Hope this helps, might have told you some things you didn't want to here, but these are all things I've learned from experiance. Dave

oops sorry should have been more clear. I had the engine oil flushed and changed. The transmission still hasn't been touched yet.

This is a freshly swapped transmission, I've only put 3k km on it. I didn't do it myself so I have no idea if they blew the lines or not. On the receipt they did charge me for new transmission fluid and filter. But seeing how the fluid is clear, who knows if they actually did either.

The car does shift late early in the morning when it is still cold. After about 5 mins of driving it shifts perfectly. Otherwise, whether it's cold or hot, whenever I really hammer on the pedal from stop (such as when I'm trying to spin the tires) it does slip. The rpm's go up but the car doesn't go anywhere until I ease up on the pedal in fear of over-revving.

New clean trans fluid will look a very light pink color on the dipstick, gets darker red with more mileage and will be brown with an odor if it's been in there a long time. If it's black and smells burnt your trannys more than likely fried. All this being said go back and drop the pan and check for tne above formentioned metal shavings and pieces of bands. If pan is clean, some fine gray matter is normal, change the filter and refill with new fluid and road test for slippage. If it still persists sounds like you need a rebuild. Dave