Metalblock Transmission Shifter Seal Remover/Installer,Compatible with GM 200, 200C, 200-4R TURBO 350, 350C TURBO 400, 425, 475 GM 700-R4 GM 4L60 GM Allison - 540，Includes Seal

Worked well change the seal and replace it

I recommend you clean the id of the extraction tool. Debur the leading edge too. The tool is a snug fit over the shifter shaft. It is made to screw into the seal. You will need to apply inward pressure while tuning it in. It will bottom when it's in all the way.I used a 3/8 drive wratchet and socket. Worked great. Utube video showed it being driven in with a hammer. This is not necessarily. The tool didn't need reamed out either...not sure what trans that guy was working on. I put a little grease on the jacking bolt...but probably not needed. The seal that comes with the tool is low quality. I noted the rubber ripped, even with a light coating of synthetic grease, on the seal and shaft. Ordered the AC Delco and had no problem. The AC Delco also had a better quality metal shell. The install tool was tight on the shaft too. The seal will bottom when in all the way. I used a small deadblow hammer. Used vise grips to help wiggle the install tool back off the shifter shaft. Probably should have cleaned, beburred, and greased install tool too. All in all good. I did see Napa sells the same tool for less then $10 (without seal)...however I didn't call to confirm that price.

Had the same experience as others. The tool is very very cheap metal. The ends of the tool broke off in the old seal. Had to remove transmission pan and shifter shaft. The shaft is now damaged. Now I'm into it for a new shifter shaft, seal, pan gasket. Waste of time and money. Not to mention the frustration. On a positive note the tool did fit over the shaft and I decided to look more closely at the seal, the seal housing was out of round and it looked cheap. I decided to buy a better seal to avoid future problems.

Worked perfect turn clock wise tap do that a couple times till it grabs . I did 1/4 inch turns make sure to get this tool . It slipped over the rod and others did not also indiscretion its tip were it threads in is smaller like 0.040 the other size did not work I sent back

Not any good. The first seal the tool broke. Had to use my 30 year old tool to get seal out. Then the installer was to short and bottomed out before the seal was installed. the seal that comes with it wasn’t any good nether.