Tranny 94 concorde 3.5 litre won't shift from 3rd gear to overdrive

The Check Engine Light is on? Did you read the DTCs.

The second link has the answer, the first link says it is a known issue. It is times like this you need the Dealership or a good auto electrician.

Transmission won't shift to third until temp rise

ClubLexus https://www.clublexus.com > forums > 713188-transm...
Apr 1, 2017 - Transmission won't shift to third until temp rise ... The solution is to drive slow and keep rpms at 2.5k and 3k at max till the engine and transmission warm up.
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Owner of Lexus RX300 with 182000 miles. Recently the ...

JustAnswer https://www.justanswer.com > lexus > 3wsxt-lexus-rx3...
Aug 22, 2010 - Recently the transmission won't go into overdrive. Stays in 3rd gear like when you press the o/d button to do so. When car is cold (live in ...
1 answer · Top answer: Hello and thank you for using just answer! The check engine light is on correct?

https://www.google.com/search?q=Lexus+RX300+will+shift+into+overdrive+once%2C+and+after+slowing+down+it+won%27t+go+past+3rd+gear

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You are lugging the engine. Overdrive is only for use in top gear when you get to cruising speed to reduce the engine speed.

Tranny most likely shot. I believe yours is a T-5, I had the same issue years back but in 3rd gear. Usually the clutch going out is a gradual thing. So I would have a tranny shop look at it. Maybe find a cheap rebuilt tranny for ya.Look online or a trusted shop.

I think you have a four speed electronic overdrive like my 94 merc.

I never had problems but I changed filter and fluid and added Lucas Oil Products - Transmission Additive 24 oz do not over fill.

unhook lincage at tranny and try shifting it unhocked if it shifts it inthe linckage someware cable or shift lever most likley linckage if it dont move at tranny its in the tranny

you will need to connect it ti a scanner to confirm but it sounds like your solenoid (there is a solenoid that controls those gears inside your tranny) the part is actually cheap and should take no time to replace. the cost comes in a way of replacing the tranny fluid that will be lost.

check fluid conditon and level, may be a faulty soleniod

You are going to need the transmission rebuilt.

Computer firmware needs upgrade

Take your car to a Chrysler dealer shop and have them update the transmission program.As your tranny wears it loses it shift point and stutters between 40 - 45 mph looking for the right gear to change to..Had same problem in 94 Concorde and 94 T&C minivan.Reprogramming tranny fixed both cars.

Could it be the cluch?