Unlike the torque converter in the GM 5L40-E ‘box (3.0l M57 engine) the unit in the 5HP24 doesn’t have a particular reputation for failure. Having said that, you do occasionally see posts from owners with driveline vibration issues around 1500rpm which result from a lock-up clutch fault when it’s operating in its ‘continuous slip’ mode.

I always get my torque converters re-manufactured anyway because I often don’t know the history of the transmission I’m rebuilding - or even what fluid is in it. At around 200GBP I think it’s worth it (compared with the hassle of replacing it at a later date) – especially as the last thing you want to do is to recontaminate your new transmission fluid following the rebuild (it’s impossible to get all the old fluid out of the torque converter without unwelding it). The places I use turn the converter around in two days i.e. they re-manufacture your own unit and return it to you.

I would strongly recommend that you get your torque converter re-manufactured while it’s out of the vehicle. I believe that Transtar, Beltsville Transtar Industries, Inc. - Torque Converters are the ‘official’ ZF car transmission part distributors for Maryland, so it may be worth getting a quote from them?

Phil