Throwing code P1811

[knightryda01]

Hey guys, looking for some help. I have a 2002 Grand Prix GT. it's currently Throwing code P1811 and I'm just looking for a way to fix it. Is this something that is going to kill my transmission? Ive noticed it happens between 3rd and 4th gear. Car seems to hold around 3000 rpms a little to long and eventually you will feel it shift to correct gear. I've checked Fluid and I'm good there.

I read on here someone sells a shift kit that fixes this issue. Just looking for someone to point me in the right direction.

 

[Fivefingerdeathpunch]

http://tripleedgeperformance.com/Harsh-Shift-P1811.html


http://shop.tripleedgeperformance.com/Transgo-SK4T65E-Shift-Kit-K84908M.htm

That is what you want, you can find it on ebay for cheaper sometimes. Note that it might not fix it 100%, but it can surely help.

 

[knightryda01]

http://tripleedgeperformance.com/Harsh-Shift-P1811.html


http://shop.tripleedgeperformance.com/Transgo-SK4T65E-Shift-Kit-K84908M.htm

That is what you want, you can find it on ebay for cheaper sometimes. Note that it might not fix it 100%, but it can surely help.

Thanks, appreciate it.

So let me ask, is this something that eventually causes transmission failure? or is it just a just a little something that I can deal with? cause I notice after I get that shift into the correct gear, the car seems to drive fine and shift properly until I turn it off.

I drive mostly highway, 55 miles at a time.

 

[BillBoost37]

If you put in the shift kit.. it'll take care of the issue to the point that it won't cause further problems in the trans. Essentially..it's masking the problem by shifting a little faster/firmer than stock.

 

[Bronco Boy]

As mentioned, the shift kit is a "band-aid" solution. With that being said, my band-aid has been holding up for 4 years now (daily driving). I didn't do the trans cooler, and I do run warm in the summer (as highs as 208*), so I would recommend doing that too. Doing this will help the trans live a longer life as to high of line pressure is a trans killer.

Here is a good thread to read: http://www.grandprixforums.net/threads/25211-4T65E-Hard-Shift-Solution

Here is my install: http://chrisb.users.superford.org/Grand_Prix/Projects/Shift_Kit/Shift_Kit.html