The first thing I look at is the trans fluid. It should be bright red; if it is dark and SMELLS burnt that is a sign of problems. Does the trans slip? If you have not done so, change the filter and flush the fluid many times that can work wonders. Good luck.
If the blazer is wheezing, it could be transmission, but if it has 4-wheel drive, check to make sure that the gear is correctly shifted.
You might need to change the fuel filter. Or you might need to replace the fuel pump.
There are numerous signs of transmission problems. You may have trouble getting the car into gear or it may smell like it's burning. With either of these, you should first check the transmission fluid level while the car is warm and at an idle.
Inadequate fuel pressure. If that 2000 S10 Blazer has a 4.3 engine, it needs 61 to 66 psi (engine off with fuel pump running) to run properly.
They get noisy, squeal and vibrate. Also if you keep burning out the blower motor resistor, that is a sign the blower motor is on its way out.
If the transmission is slipping (the engine revs up when it shifts), if the transmission shifts late, even under normal acceleration, or if the tansmission simply won't shift, you should get it checked. Also make sure the fluid level is adequate.
That is one of the signs that your transmission is going bad. Better have it checked at your local mechanic before it leaves you stranded.
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Check your radiator for signs of transmission fluid ( you will know as soon as you open the radiator cap) oily, creamy, gunky buildup. The transmission cooler is built into the radiator core and it is common for this to leak allowing coolant into the transmission and transmission fluid into the cooling system.
The signs of a bad transmission in a Mazda might include hard shifting or a refusal to shift into certain gears. A revving of the motor during the shift can also be a sign of a bad transmission.
depends is it standard or automatic
There are a number of signs that become apparent when an ECM computer on a 1990 Chevy is going bad. The top signs include a non-functioning speedometer and flashing codes on the dash.