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piecesparts · 01-14-2007, 06:16 PM

There are a couple of places the 700R4/4l60/4L60E (all basically the same units) trannys suffered. The valve body has seperator plates in them that the balls work against. These plates are not hardened from the factory and they suffer after awhile and the holes become wallowed out. That in itself will create a bad shift. The planetaries on the trannies are also a problem, with age. These can be replaced with hardened stronger units that causes the transmission to work better. As for shift imporver kits, I would look seriously at the TRANSGO kits, they are far more involved and better designed than the ones from other suppliers.

I prefer a neck snapping shift in the 1 to 2 gears, I want that gear to engage and hold, which means there would less wear on the bands, due to sloppy shifting. I have my trucks and my wife's Impala Ss set u p to do just that.

01-14-2007, 06:16 PM	#6
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: 4L60E Trans Shifts hard from 1st to 2nd? There are a couple of places the 700R4/4l60/4L60E (all basically the same units) trannys suffered. The valve body has seperator plates in them that the balls work against. These plates are not hardened from the factory and they suffer after awhile and the holes become wallowed out. That in itself will create a bad shift. The planetaries on the trannies are also a problem, with age. These can be replaced with hardened stronger units that causes the transmission to work better. As for shift imporver kits, I would look seriously at the TRANSGO kits, they are far more involved and better designed than the ones from other suppliers. I prefer a neck snapping shift in the 1 to 2 gears, I want that gear to engage and hold, which means there would less wear on the bands, due to sloppy shifting. I have my trucks and my wife's Impala Ss set u p to do just that.