Is there a easy fix for hard shifting on a 2005 monte carlo, had the fluid and filter changed, didn't help, was told by the transmission shop that it had a P1811 error code.................

could be clogged transmission filter or shift valves in valve body sticking go to auto parts look for transmission additives to help free shift valves and buy transmission fluid for high mileage transmissions the fluid will recondition swell up transmission seal help transmission shift better.

Could be fluid/filter but also could be shift solenoid/governer.

when is the last time you had the fluid changed? the fluid and filter is supposed to be changed in automatic transmissions every 12,000 - 14,000 miles. it may be something simple but if you don't have an error message or OBDII code to go along with your problems then more than likely its either the filter and fluid or it may also be about time to have the transmission rebuilt. Before the transmission is too far gone you'll see a check engine light that will come on with a code for not shifting properly or slipping. once you see that i would take it to a reputable shop to have it rebuilt before it gives you major trouble or leaves you sitting.

It dosn't sound like you have a major problem .I would take it to a transmission shop for service oil filters testing for codes its about 100 bucks .new transmissions are a lot more .

Transmission. Check fluid level using proper checking procedure, which is usually get to operating temperature (take it for a short drive), park it in neutral idling, parking brake on. Fluid should be at correct level, and red in color. Anything else, have a transmission flush and fill, do the filter as well, just to be safe. It's a good place to start. And hopefully you don;t have bigger problems. Hope this helps.

has the fluid and the filter in the trans ever been changed? this should be done every 60,000 miles, if it is overdue it can cause shifting problems.

my son had the same problem on his 2003,i checked with a friend at a trans shop and he told me it has two senors in the trans (inside the cover on the drivers side ) and would cost $600.00 to $700.00 to fix,my son has a repair manual,so we looked it up,we bought the two shift senors cost approx, $100.00, thinking an easy fix,not at all, first we had to jack the car body up and drain the trany fluid, disconect everything,CV axel then we had to drop the engine and trans cradle down to gain acess to remove the side cover, the sensors took less than 5 min.to replace after we got the cover off, after about 8 hours of work,start to finish we replaced the two sensors and that fixed the problem,trans runs like new,this problem seems to exist in these transmissions my friend says,if you have some friends that know how to work on cars,you can save yourself alot of money, BEWARE if you let this problem continue you will blow your trans,hope this helps.

Fluid level, filter condition or front pump wear.. Sounds like a filter.

try changing the transmission fluid and filter. trust me, the same thing was happing to me on my truck. never would have thought it was the transmission fluid but it fixed that same problem you have. comment back if you need help changing the filter and fluid.

Well, I'm not really sure what the manufacturer's recommended interval is... But to be honest with you, once every 100000 kms, or 5-6 years is plenty for a transmission fluid/filter change is enough (yes, there is a filter inside the pan of the transmission, assuming it's an automatic). But, if you notice problems earlier (transmission starting to slip, fluid discoloration, or any other transmission related driveability issues) the first thing to do would be to do a transmission oil/filter change as soon as you can. Beware of these places that offer a transmission flush, that's about as useful as putting winter air in your tires, and costs money for nothing.