1999 4L60 in a 2004

[Eds_Automotive]

Hey folks. I have a customer that brought me a 2004 Trailblazer 4x4, slips when it tries to shift into 3rd but if you get it going fast enough in 2nd then it skips it and goes into 4th. I did a 2-3 shift solenoid and didnt fix it, colleague says 3/4 clutch pack is going out. I have a donor 4L60 from a 1999 Tahoe that a friend left here hes willing to sell, I just need to know what, if any, modifications I'll need to make to be able to use it. Will it be a direct bolt on with no problems? Swap bell housings? Different torque converter? Thanks for any help.

[Dan Barlow]

If the tralblazer had the online 6 then the bellhousing is different than the tahoe that had a V8 . If I remember correctly the bellhousing can be switched. How they are wired .... no idea .