M Transmission Shifter Seal Remover Installer, suitable for GM 200, 200C, 200-4R, compatible with Turbo 350, 350C, 400, 425, 427, fit for GM 700-R4, GM 4L60 and fits Allison-540

This handy little tool easily removed the old seal and after careful positioning of new seal , tool helped set the new seal . Care must be taken when pushing new seal over shaft so the spring at the lip of the seal is not disturbed. Very happy with the results !

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.

Shifter seal remover/install tool worked perfectly.

Delivery was great ordered it got it the next day. Installed tool over shifter shaft and never got it into the old seal before the whole end broke off, I think the steel that the tool is made from is too brittle. Had to get the seal out piece my piece very carefully without damaging anything. The seal driver works fine you just have to be careful getting the seal in there