I'm new to this forum and I'm getting the hard shifts when the trans is hot. I've read some of the post on how to fix it my problem is I can't find anyone in the Chicago area to fix it. If any one in the area has fixed this or know someone who has give me a call or shoot me a pm 312 241-2122 Ricky

my 2000 Lesabre was doing this...they changed the EPC solinoid and it still kept doing it...If I shut it off and let it sit for a few minuted and restart it would be fine for another day or so,,,

Tranny shop said i needed rebuild...it had less than 50k on it...so I found info on this site of others who installed a shift kit and it was fine...I made the bushing from aluminum bar stock and put it in per the instructions I found here...

The car has over 10k on it now ( knock on wood ) its been perfect...never did it again...when mine would do it you coud hear the pump whine if you put it in neutral and rev'd it up !

Tranny guy said it wouldnt work....it did...mine was throwing a code but not a CEL...it had the code stored for long shift...the tranny sees a slightly long shift and to protect the tranny it goes into hi pressure...this is the pump noise and hard shifts...

4T65E Do-It-Yourself Shift Kit: Instructions and Install Guide

I used The TransGO Kit
TransGo 4T65E: SK 4T65E

With New Filter and Dexron VI (6) All is well now!!

I didnt even replace the springs just installed the homemade bushings....shifts great

Thanks guys for the info,I don't have a garage to do it that'* why I was looking for someone in my area that could do it and thanks again.

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.
https://www.gmforum.com/performance-...ission-287906/
*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.

Hi guys I'm looking for someone or a tranny shop that have did this before in the Chicago land area, if you know someone or a shop please pm me or call 312-241-2122 Ricky

Still looking for some one that can do the job for me if some can do it please pm me or call or text 312-241-2122

Be careful when replacing the lines connecting the accumulator to the transmission. Ensure they are not swapped. Messed this up once, killed 3rd gear.