Posted by jimg.allentown on August 17, 2017 at 16:09:32 from (173.49.133.204):
In Reply to: Transmission question posted by dhermesc on August 17, 2017 at 06:45:52:
Now that everybody else has had their say, I will give you my guess. After having been repairing automatics for about 45 years, I have a good idea how they work... First thing is that there is NO PROBLEM with the torque converter. If it were staying locked, it would simply kill the engine when you put it in reverse. Just like a manual if you were to let the clutch out too fast. Next, sluggish in reverse could amount to two main possibilities that I see. One would be the converter draining back. In this case, you can verify that by letting it idle for a minute or so when you start it before trying to put it into gear. Another possibility is that a friction element like an intermediate or direct clutch could be hanging up. This would give the effect of trying to be in two gears at the same time thus causing sluggishness. Next, slamming into the forward gear. This would also point to a sticking or hanging up of a friction element that is used in a higher gear than first. In order to diagnose something like that, I would need to take a close look at a power flow chart for that transmission. That might shed some light on the cause of the problem. Next, as to changing fluid. I personally do not think that it will have any effect on the problem. And, not all filters can even be changed without disassembly of the transmission. The Mazda/Ford CD4E is like that. The filter on that one is inside and requires you to remove the transmission and separate the case halves to access it. Either way, changing fluid is probably not going to help anything, and if you do not refill it with the correct fluid, you could damage the transmission. I strongly recommend against these "flushing" outfits. First thing is that they cannot completely flush a unit - no matter how much they say they can. Next, what are they refilling your transmission with? The correct fluid? Most likely not. Bear in mind that there are quite a few different types and specifications of transmission oil out there these days. I consider that the manufacturer most likely has a GOOD reason for specifying a particular oil.
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