Best 4l60e shift kit

[Jrp79]

Trucks a 99 Silverado 2wd extended cab 4.8 4l60e. Im looking into shift kits and from what i read the transgo hd2 is the way to go but i really dont want to pull the transmission to put the upgrade parts in the pump. That beeing said what does the hd2 kit have that the basic doesnt and if i got the hd2 kit and didnt do the pump parts will it still perform good?

[CamGTP]

I say do the corvette servo upgrade and see what you think about it after that.

[sefiroxx]

I would have recommended buying a remanufactured and upgraded babe body.

The early valve bodies had a few problems like weak springs and plastic accumulators. You should replace those, and install a new separator plate to get check ball holes back to spec.

Since it's 20 years old, triage the solonoida and the internal wire harness to play it safe.

[Jrp79]

Doesnt the hd2 kit include the metal sleeves to replace the plastic ones? What year valve bodies are compatible?

I like the way it shifts when the tow button is pressed. When normal,the shifts are kinda sloppy

[sefiroxx]

Sloppy - probably leaking fluid at various points and likely In the accumulators. The hd2 should help.

The hd2 does not have accumulator pistons (the pro kit does). You can find the piston here

https://transgo.com/product-details/4l60e-accumulator-pistons/