Hi i got a 97 trepid i had to change the seals in the diff and the bearing but did not take apart the trans inside. put it all back like the tv cable and all. Now you put it in gear and it doesn't work and i dont here the trans noise it use to make when you put in gear.thanks daniel
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remove the driveshaft then romove the yoke and the seal there may or may not be a clip holding in the bearing but when changing the bearing the race should be changed for this remove the wheels with the diff on stands remove the rear cover on the diff push the axles in and remove the c-clips from inside the diff then pull the axles out inside the diff you will see 4 bolts remove them and take out the spider gears and drive gear once the drive gear is out you can use a punch and hammer to remove the rase to insall the new rase use a BRASS punch as to not damage the new one then install parts as they came out
That will be a Huge job. The whole front diff must come out of the car and the case will need to be taken apart to even gain acess to the carrier side bearings.
The hub bearing is where the wheel bolts up is that maybe what you are talking about?
Also the axle seal isn't that bad to do you need to remove the cv shaft then it's just a simple remove the seal and install the new one.
But all of these jobs will be big ones.
If you are talking about the rear diff case. The seal can be change usually either a rubber gasket or hi temp silicone, just scrape off the old gasket from the diff and the the cover. Make sure its clean before you put on the gasket or silicone whichever its has. Put a good amount of silicone around the diff cover and bolts holes. Make sure to get some rear diff fluid and fill it back up w/funnel. Its either on the diff cover w/ a rubber cover or on the side of the diff itself w/ 3/8 ratchet. Fill till up till it starts to drip out then tighten back up.
Change the U-joints on the rear drive shaft. They don't have to move to be bad. The bearing in the joints are rusted. Be sure to mark the yolks on your drive shaft and rear diff pinion. They are ballanced are must go back in the same way you took them apart.
With that being said, did you drop the shaft an dnot put it back in the right way? that will cause a vibration. Also, have you checked to see if there is any play in your pinion shaft?
Have him ensure that EVERYTHING lines up EXACTLY just right. It helps to try to put the transaxle back in the right spot if it is actually in gear....... he can actually also try to have someone just tap the key to turn it over a bit as he tries to put it back in. This may line it all back up right.
Head to a hardware store or a Car parts store and get yourself a set of "Easy-Outs".
The idea is that you drill out the bolt with a bit about half the daimeter of the bolt. Insert the easy-out into this hole. Now the easy-out has a very loose backwards thread that bites into this hole you drilled. And turn itall in the out direction. The stub of the bolt left may still need wd-40, hitting with a hammer , heating, or what ever to loosen it slightly. - Neil