No reverse in transmission 1997 Chevrolet Express Van 1500

Lost reverse in transmission. All forward gears work without slippage. Also downshift is fine. Reverse acts as neutral. Transmission fluid not leaking and has no burn smell. Been driving vehicle for a couple of months without reverse and haven't noticed any decline in any forward gears. Am able to shift all forward gears manually and they're all there. Only reverse gone. I'm thinking it's possible that the problem is a valve. Either the reverse boost or body valve? Thanks

My car has 230000 miles.
My car has an automatic transmission.1997 Chevrolet Express 1500 5.7l 4l60e t

Experienced mechanics share their insights in answering this question :
Hello – I believe you have a failure in the reverse input clutch in the transmission. This could be caused by several components in this clutch, all of which will require removal and disassembly of the transmission to repair. To confirm this diagnosis, I recommend a transmission inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

An automatic transmission that won`t go in reverse is just one symptom of a low transmission fluid level. You may notice fluctuating shifting or an engine that overheats or stalls. Weird things happen when your car`s systems have to work harder than they are supposed to.
On an automatic transmission, leaking internal gaskets, seals or O-rings will keep clutch packs and bands from engaging gearsets — a common cause for the inability to go in reverse. Leave these for your mechanic to fix.
However, a defective speed sensor is viable by an illuminated warning light on the dashboard, signalling that it`s time to repair or replace the speed sensor. These are the major causes that hamper the transmission system, due to which the car won`t go in reverse sometimes.
In many cases, delayed shifting of any kind is caused by issues with the transmission`s valve body. Shift solenoid or computer malfunctions can also result in these types of hitches and may require transmission service for correction.
But if the solenoid malfunctions mechanically, no reverse or delayed and slipping reverse may occur.
Problems Reversing – One common problem that can happen with a clogged filter is difficulty moving in reverse. The lack of fluid flowing through the transmission can cause the reverse gear to lock. This may prevent the car from going in reverse altogether, or it may cause it to hesitate before launching into reverse.
When the transmission is put into Reverse, the small sun gear turns the outer ring gear backwards. For Park, a small toothed parking gear is firmly held by a small latch called a parking pawl, which prevents the output shaft from turning the wheels.
A surefire sign of a failing torque converter is when the vehicle won`t shift into a specific gear at all. If you can`t get it to go into reverse or forward drive won`t engage, then it`s probably something wrong with your torque converter.
Transmission Range Sensor (TR)/ Transmission Position Sensor

The Transmission Range Sensor tells the PCM the position of the transmission shifter. The PCM uses this information to control which gears of the transmission to enable or disable.

If you look at the solenoid application chart in Figure 1, you`ll find that only shift solenoid F (SSF) is on in the reverse position. SSF is on the secondary valve body and controls the position of the 4-5 shift valve.
With engine off and ignition on, check for proper solenoid operation by placing gear shift in reverse. Backup lights should turn on and an audible click should be heard in the solenoid. Make sure backup lights do not engage in any other gear position.
The transmission position sensor is usually screwed onto the side of your car`s transmission. As you move the automatic gear selector from park/neutral to drive or reverse, it detects the changes. It then enables and disables the connection to the starter motor circuit, affecting your car`s ability to start.
A backup light switch screws into the transmission and is triggered when you shift the vehicle into reverse. If the switch is functioning normally, a circuit is completed when the switch is triggered and the white lights in the tail lights will illuminate, indicating to other drivers that you are backing up.
A transmission that does not go into reverse can be caused by a wide variety of different issues, and could be related to the fluid leak you are experiencing. A few common causes for a transmission that will not go into reverse is a faulty transmission solenoid or low fluid.
The job of the transmission filter is to collect excess debris that may otherwise cause damage to the valve body and other internal parts. You may run the risk of damaging the transmission further by driving without the transmission filter.
If your car will not go into reverse, it is an indication that the reverse gear in your transmission has failed. This will prevent the truck from going into reverse. To fix this problem, the transmission will need to be rebuilt or replaced.
If the shifter is on your steering column, then the neutral safety switch will often be located beneath the gear shifter. Some manual vehicles have a similar device located under the clutch pedal.
Modern cars, which have 6 gears, usually have a spring or button, located right below the head of the gear shift, which you have to move upward or press if you want to shift into reverse. Whatever the situation, look for reverse gear on the top of the gear shift, press the clutch and shift into reverse.
This could likely be due to a faulty computer that controls the transmission, a faulty transmission solenoid, or another issue with your transmission. If there is an issue with your solenoid you could be experiencing slipping gears or a transmission that won`t shift into gear properly at all.
Problems Reversing – One common problem that can happen with a clogged filter is difficulty moving in reverse. The lack of fluid flowing through the transmission can cause the reverse gear to lock. This may prevent the car from going in reverse altogether, or it may cause it to hesitate before launching into reverse.
Along with gear slippage, low transmission fluid levels can also cause low levels of pressure, which leads to slower engagement when shifting gears. If you notice your transmission takes a second to engage when put into drive or reverse, it could be due to low fluid levels.
Problems Reversing – One common problem that can happen with a clogged filter is difficulty moving in reverse. The lack of fluid flowing through the transmission can cause the reverse gear to lock. This may prevent the car from going in reverse altogether, or it may cause it to hesitate before launching into reverse.
Along with gear slippage, low transmission fluid levels can also cause low levels of pressure, which leads to slower engagement when shifting gears. If you notice your transmission takes a second to engage when put into drive or reverse, it could be due to low fluid levels.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

No reverse in transmission 1997 Chevrolet Express Van 1500
ANSWER : Hello – I believe you have a failure in the reverse input clutch in the transmission. This could be caused by several components in this clutch, all of which will require removal and disassembly of the transmission to repair. To confirm this diagnosis, I recommend a transmission inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

My van transmission started slipping and the van is making a whining sound now. I had transmission fluid filled but it is even wor
ANSWER : It would be a good idea to check to be sure that the fluid level was not overfilled. Too much fluid creates shifting and operational problems just as too little fluid will. So, the level should be carefully verified. If the whirring noise is from the transmission (it could be wheel bearings for example), such noise could be from the torque converter, oil pump, or other rotating elements. The noise would have to be heard first hand by a mechanic to pin it down. If the transmission is not shifting properly, it could be as simple as a valve body issue (typically the valve body is replaceable on the vehicle) but there are also many other causes of shift difficulty such as broken or worn bands, failing clutch pistons and so forth. Some of these faults can be determined by using external gauges to measure internal hydraulic pressures within the transmission when you shift. Transmissions can be repaired; you won’t necessarily need a "new" transmission but yes, admittedly, such repairs can be costly. If you want to get a definitive diagnosis and get information about repair options, just request a transmission shift and noise diagnostic and the responding certified mechanic will help you with that. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Frank, Id like to install cruise control into a chevy express 1500 AWD that currently does not have it. Is that possible? 2012 Chevrolet Express 1500
ANSWER : Hi there – yes, that would be possible, although the cost effectiveness of adding this feature to your current vehicle may not make sense. Adding cruise control could be done by either finding another Express van in a recycling yard, and acquiring all the components involved, and transplanting them to your van. You could also purchase a new, but aftermarket cruise control kit, and have it installed. Unfortunately, this is not a service YourMechanic offers at this time. I would check with your local Chevy service centers and recyclers for cost estimates for each approach. Good luck!

I just got a new transmission put in my car and it drives and reverse but won’t go up hill.
ANSWER : This may be a sign of a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car’s computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When this is faulty or not working properly, this can cause a delay in gear shifting or in some cases cause the car to not shift at all. I would recommend having an expert from YourMechanic come to your location to take the car for a test drive to more specifically determine the cause for this.

Can I add Lucas oil "transmission fix" to my transmission fluid to see if it helps my issue.
ANSWER : Adding an additive to the transmission to try and fix a problem will not work in most instances and should only be used as a last resort before getting a transmission overhaul.

2003 jeep liberty stuck in reverse, shifter is stuck…but crawling under and trying to manually shift from transmission stuck
ANSWER : Hi there. Based on what you have written above, it is highly probable that the inner linkage has come loose or there is an obstruction within the inner gear set that is causing your problem. Unfortunately, this typically requires dropping the transmission and repair or inspection from the inside. This is not a service our mobile mechanics are equipped to offer, so your best bet is to contact a local transmission specialist for assistance.

2013 Ford Focus Transmission Issue. Is it worth keeping the car?
ANSWER : Hi There,
This is a known issue in this generation Ford Focus and some Fiestas with the "Power Shift" transmission and there have been numerous recalls and lawsuits. Although, it is would be difficult to determine how much longer your transmission will last given the fact that you have many new parts, I would not recommend junking the car as it may still provide some valuable life left for you. I would recommend taking it to the dealer to see if these parts may be covered under the recall.

Car transmission stuck in Reverse, shifter stuck in Park, Car won’t start.
ANSWER : Hello. You will need to look under the vehicle where the shifter cable hooks to the transmission and look at the cable connector end for a worn out bushing. You may be able to push the shift lever on transmission into park so you can get it started. Make sure you have the wheels blocked and parking brake on so the vehicle does not roll. If you need help having this diagnosed, a certified technician from YourMechanic, can come to your car’s location to inspect the start problem and diagnose the shifting issue.