When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a Mazda Tribute 2006 2.3. The O/D light would come on, drove it to a friends to scan the check engine light code, and the car almost made it there and then wouldn't remove in reverse, forward, or anything. Turn it off then start it up still wouldn't, then turned it off let it cool and it worked again for a little while.
The code was P0741, just the one code. Took it to a shop to have further tests, they seemed to think it was the clutch was worn and when the fluid heated it lost friction.
Pulled the transmission and thought why not do a Transmission rebuild? I have never done one but there was an awesome video on youtube of the guy doing it so I figured it couldn't be too hard and was just going to try my first rebuild.
According to the guy in the video you always need all new bushing, and we will get a rebuild kit with new clutch packs and the other stuff that comes with those, and sounds like it's a good idea to replace the torque converter.
The car is only at 85K and it looks like the transmission was rebuilt once before he got it at 80K. Maybe a bad rebuild?
Here are some pictures I would love your help with?
The Input Sprag bearing was shredded and the bushing looks terrible. Can I just replace the bearing and the bushing? Is there any other damage I should be looking for because of this?
The forward planet you can so some eaten metal on the edge and 2 gears spin super smooth and the other 2 you have to push pretty hard to get them to turn. So new forward planet?
The shell's corners look a little rounded I wasn't sure how much was to much, can you tell from the picture if it looks like too much?
Any other input would be hugely appreciated!
Thanks!
I am guessing you saw Hirams teardown and re-build on youtube. If not, it is an excellent example of someone who wants to share his knowledge and educate people.
As he stated, you will want to replace all thrust washers and bushings. When you replace a bushing, you also should look at and inspect the surface that rides in the bushing. If it is scored or damaged, you need to seriously consider replacing that part also, as the new bushing will just get eaten by the damaged surface.
Looking at the pictures. Ohhhhh.
I am NOT an expert, but did do some work in a transmission shop years ago, so consider the source.
Input sprag
From 2500 miles away, I'd say replace the thrust washer, the sprag, and inspect everything else for scoring or wear marks where things 'got out of position' and rubbed where they shouldn't. Check the gear teeth for chips and abnormal wear patterns. The inner diameter did NOT look good, as it appears scored.
Forward planet
If any of the planetary gears have rough spots, they will not heal themself. The bearing inside will just get worse. It makes no sense to put the time and money into repairing and leave a questionable part in place. I would replace with new or a good used unit.
Sun gear shell
The wear doesn't look too bad. If you think the parts will line up exactly with the current wear spots, you can put it back. If you think the parts might shift, and start to wear in another spot, you might want to replace it. What you want to avoid is two things. Offset such that things cannot move linearly, and get hung up in the edges of the worn spots and the second thing is concentrating the torque in a smaller area than was designed. The part that meshes will want to find a new wear spot, likely, as the 'stackup' of parts will not be exactly the same. As it fits, it will be 'canted' if it hits a high spot on one end and has the remainder of the contact area 'left' un-touched by the shell.
My thoughts would be take all the questionable parts to a local shop. They will be happy to sell you some good used parts if they have them. Anything they sell should be un-worn, smooth, and totally undamaged. They can give tips, if they are friendly, and you can offer to pay them to assemble the clutch packs(pistons & seals) using their foot press.
Get some assembly lube before putting it back together, and make sure you put the thrust washers in facing properly. Some are easily installed facing the wrong way. I would also find a bushing cutter tool to remove the old without damaging the parts. You can make a 'press' using nuts, washers and bolts or threaded rod to install the new bushings. Inspect the pump shaft for any wear on the hex ends, and both the torque converter and the pump inpeller. You do not want to put it back together and loose pressure due to a worn pump drive.
Watch Hiram one more time...
tom
