Q: Won't shift when warm

asked by on August 11, 2016

I'm having problems with my transmission. It won't shift when the truck is warmed up. It doesn't shift out of first gear or go into reverse. But if I turn off the truck and start it again it works OK. I wonder if it needs a new transmission. I bought it a week ago, and it drove OK for the first ten miles. When I came out of overdrive it would only go 50 mph, and it seems to get worse all the time. Do you think I need a new transmission?

Hello there, many different faults may be causing your 1988 Chevrolet C2500 not to shift. The most common would be low transmission fluid, shift linkage, transmission range sensor, shift solenoid, or a mechanical transmission fault. Have a qualified technician, such as one from YourMechanic, diagnose your shifting issue and pinpoint what repairs are appropriate.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Error codes on my 2012 Q5 P2099 P2096 & P2196

These codes could possibly be related to an issue with the turbocharger or the catalytic converter. Unfortunately these codes could lead to very expensive repairs depending on what exactly is the cause of this issue. I would recommend having a...

The defroster will not blow warm air in a 2007 Ford Mustang.

This is going to be caused by a problem with the temperature blend door and mode door to the defrost is not opening to get warm dry air. You may have a broken door inside the evaporator heater case and...

When putting car in reverse heard a Big Bang and car won't move now not even in neutral

Hello, thank you for writing in. There are several things you will need to look at or have inspected. First, we need to look at the transmission itself, where the linkage from your shifter connects and switches gears on the...

4Runner has no power in the engine.

Check the engine for a vacuum leak and see if the valve on the brake booster is leaking. Also check the EGR (Exhaust Gas Recirculation) is stuck on all the time. A vacuum leak or the EGR being stuck on...

When i remove fuel pump regulator should there be fuel in it and if not how do i know if regulator is bad

I'm assuming you're talking about the fuel pressure regulator. If the regulator is not leaking, the only test for it's functionality is a fuel pressure test. That takes some special equipment. If the car is backfiring out of the intake,...

Will putting a different tire size cause my car to shake or my tires to wear out quick and uneven?

Hi there. The engineers that design vehicles do so by making sure each part is precisely sized to match others - so the vehicle operates safe and efficiently. This includes the wheel and tire overall width and circumference. What you're...

Check engine Light on and medium consume increased fast

Hello, According to the numbers you have provided, the engine is consuming much more fuel than it is supposed to. You also mention that this began only after your Check Engine Light came on. From your description, it appears that...

Can't open door from outside

Generally, the outer door handle itself is the issue. You will want to get this repaired as soon as possible; if someone hits the child lock switch, you will not be able to open the door at all. You may...

Ignition lock damaged

You may need to replace the entire steering column, or just the key cylinder; only a visual inspection can verify the extent of the damage, and what parts would be needed for repair. I would recommend having a certified technician,...

Related articles

2012 Chrysler 200 vs. 2012 Chevrolet Malibu: Which One Should I Buy?
When you are looking for a small-range sedan, you need to get somewhere quickly and inexpensively, and may even need to take a few kids with you. Slightly larger than a commuter car, these mid-size options offer decent gas mileage,...
How to Replace a Harmonic Balancer
Harmonic balancers fail when the engine is causing excessive vibrations and the timing marks are misaligned.
Does An Automatic Transmission Have a Clutch?
Most of the time we think of a clutch in the context of a manual transmission. An automatic transmission does have...