Bucking as its shifting into gears

So are there any codes in the computer? Also does it buck/flare going from third to fourth?

I took it to the garage today to get it checked. They told me the overdrive mode is no't working at all. He suggested that I get the transmission fluid and filter flushed and put new in plus the ATC conditioner stuff. As of right now I have to drive it in third gear because the fourth is not working at all. The gears still kick some when I starts to go in motion. Plus my rpm's are not going down as it should when driving.

Back down.

Also the computer that they hooked it into said I was a bad pressure solenoid.

What was the exact code numbers not code descriptions they found in the computer?

I honestly I did not get the code. Plus he never told me. Just informed me that it was bad pressure solenoid.

That would really help because if you had a P0434 that does not mean just replace the solenoid. It is hard to say without knowing all the information. Before I would replace anything I would be scanning it for codes and doing a pressure test.

How can you do a pressure test?

You can do a high low pressure test with the transmission pressure gauge set.If nothing is found there then you would need a professional scan tool that is capable of doing a step pressure test on that car .

Alright I will have to check into that. Can you purchase a test like that at an autozone?

A transmission fluid and filter change may be all you need.

That is a really long shot sounds like a pressure issue these cars are well known for pressure regulator issues in the valve body's.The bores wear and the pressure becomes unstable.You can try to changed the fluid but I would be beyond amazed if it fixed the problem.I got my pressure gauge set online it's a otc one and it was under 70.it is a pretty nice one.

Alright I will look into it.

Let us know what you find.

Well I am gonna get the transmission fluid and filter changed ASAP, but if that does not work I am guessing it is the pressure solenoid or the transmission is going bad.

That is what it sounds like. Please let us know how to turn out so it will help others.

Usually it is the valve body that needs replacing.With the valve body off air check the clutch pistons to make sure there all good if they are then it is the valve body.

But I would start with a high low pressure test followed by a step pressure test before removing the valve body.

I will have to inform my uncle on this stuff so he can get the idea of checking it.

So needless to say I did get the filter changed and the oil changed, but it did not fix the shifting of the gears and my overdrive worked like once, but it slipped. I am at the option now that I have to get it pressure checked.

Yeah pressure and air check the clutches.

Well when I find someone that has the tools to get it. I will let you know how I make out.

Could it be the engine that is making it buck like a cylinder misfire, its difficult to tell when we cant test drive it, can you take a you tube video and post it please?

There is a problem going into 4th gear so that's not a engine miss fire.That's a pressure issue or a leaking 4th gear clutch piston.

It's only the 4th gear that is not working causing my overdrive to not work. My engine is fine. I mean I'm no mechanic but I do know it's gotta deal with my transmission somehow.

Sorry It sounds like an engine misfire to me. Have you changed the plugs lately?

It's not going into 4th gear that's not a misfire that's a transmission problem.A misfire won't cause it to not go into 4th gear.

My fourth gear slipped or broke which caused my overdrive to go out. So I have to get my transmission rebuilt which is costing me money

I took it to someone who works on transmissions

Why don't you just find a used transmission?that's what did when my 1999 Saturn SL2 transmission went out.

It would cost me the price im gonna pay now to just put it in so why waste time finding another transmission

OK let us know how it goes.