Transmisson shifting problem - 1995 Chevrolet Lumina

no on 05 chevy the transmisson shift is control by vacume look for a vacume line that is dry rooted or has come off start at the engine first then work the way down to the transmisson. a line off or dry rotted any where in the syastem will give you a hard shift sometiimes like a hard jerking motion when
shifting.

what kind of transmisson is this 4t40or 4t60 or 4t65 or 4L60 ..well most general motor solenoids are located on the the transmisson valve body . which means on a rear wheel drive the transmisson pan needs to be remove to gain access to the valve body . On a front wheel drive the valve body is located under the side cover on the transmisson . Now if i remember rigth there are 3 or 4 control solnoids . 1-2 shift 2-3 shift and a Tcc solnoid . you need to know which one to replace and what location are they on the valve body

ummm

Try checking the transmisson fluid level if it is low this could cause the problem you are describing, any slight loss of transmiion fluid can cause the transmisson shift to shift incorrectly.

try checking the fluid level if it is even aa half pint off it can cause shift problems, if it is low add some Lucas transmisson oil condtioner this will help it shift smoother. also look at the color of the fluid is it brownish in color? if yes then it's time to change the filter and fluid. if you take it to a shop they chagre about $150.00 but it will keep you from damaging the transmisson. the oil and filter for the transmisson should be changed every 30,000 miles on any car. Thisis oone of the most overlooked items of maintence on cars peopel simply don't know about change the filter and oil till they have to pay for a new transmisson.

There could be several but It should have 100,000 mile warrenty on the drive train so take it to the dealer Your truck is notthe first one I have seen on here with this problem and always assumed it was a transmisson problem. I ned to know how they know it's not the transmisson? did they remove the shift lingange offf the transmisson and see if it would shift thru the gears ? Also Ford has it's powertrain control module mouned in the transmisson so this does not seem right to me, ask them if they took the linkage off and tested the control module and get back to me.

change the transmisson oil and filter and all oil, about 12 quarts and add 1 quart of lucas transmisson condtioner to soften the seals and bands and clutchs and clean the shafts on the shifting valves.

it's inside the transmisson you have to remove the oil pan on the transmisson to get to it.

does it shift through it's gears? 1st ,2nd,3rd? if it dosn't then the tcu is burned out a common problem for 91-93 accords

does your truck have an od on/off switch?if so its bad.if not you have an overdrive solenoid on trans that is going bad.GinoR