Darn I got bumped in the time it took to write this. Ricky, loaded with this info any garage especially a trans shop should be able to perform this work for you!
Yes I have heard that just installing the simple spacers can work equally as well.
If you believe you are having transmission issues, always get the car scanned for codes.
The Dreaded P1811 (long adapt shift) code is an opportunity to try installing some spacers or an entire shift kit into the accumulator, therefor possibly eliminating the need for replacement of the valve body or Pressure Solenoids.
Mike1995 Did a great write up on how to make your own spacers project as well.
Making and Installing a shift kit for 4T60-E transmission
*The identical sized spacers do fit into the 4T65E as well.
One service comment I personally would like to make is about heat, degradation of fluid, and the build ups of varnish in valve bodies and solenoids.
In my 4T65E I consider normal service life of the filter & fluid to be 50,000 miles.
If there is one place where the fluid gets hot it certainly is the transmission.
Heat is the enemy to the life or transmission & related parts. So the synthetic Dexron 6 with the latest friction modifiers, will always offer a higher level of protection. It is worth the money.
In my situation with P1811 and hard shift 2-3 I initially decided to use a product called SeaFoam Trans Tune, to possibly remove some varnish in the solenoids and valve body.
Overall I think this product did a good job, as I drove for 500 miles with it in the trans fluid. Trans Tune - Sea Foam Sales Company
I then installed my TransGo Shift Kit and have not had the problem since.
I know it kinda looks scarey, but follow the diagram as I posted above, and really it is not. Just remember to clean & scuff them 1-2 2-3 bores with the emery cloth.
Hope this may help... Art.