Transmission will not shift into reverse

nope, when you take it to a shop he will scan it to see if anythiing is wrong elelctrically, but it may be a reverse clutch gone or a roller clutch gone. A good way to check would be to put it in the lowest forward gear. if you have the same trouble it's probably got a clutch out of it and will need a rebuild.

The last couple years I have put a lot of money into her but here recently when I drive down the highway my speedometer started jumping, then few days later it just completely stopped working and now it will not downshift/up-shift when driving. It will go from PRND but when in drive it does not shift like it is supposed to. I was told the transfer case, then the transmission, but I am hoping for something a little smaller and cheaper like shifting solenoid maybe. Help! Can you help?

Hello,

It sounds like the vehicle speed sensor has gone out and needs replacing. You will need to Here are some diagrams and a guide to help you got the job done.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Its held on by 1-13mm bolt and a little transmission fluid will come out as well.

Please let us know what happens.

Cheers, Ken

Changed the breaks in the front of the vehicle and ever since I did that the shifting lever will not move.

What about shift interlock mechanism? Any abs codes, any trouble codes for anything? Can you take the shift linkage loose from tranny and shift tranny by hand? If you try anything like that, engine off, level ground, tranny out of gear, functional e-brake is set, block the wheels. Have a helper sitting in cab with foot on the brake. Be safe.

Thank you for the response. Yes, it will shift by hand. Also, replaced the brake booster, master cylinder and brake switch.It was parked on an incline too.

I forgot to let you know that no codes are coming up. The brakes sound like their is air in them though.

You can't shift it without stepping on the brake. Below is wiring for shift interlock mechanism. A generic obd2 code reader may not read ABS codes?

How about brake lights? Are they working?

Yes, brake lights are working. It will start and run though.

So frustrated because it is not even on the road yet. Could it be the Neutral Safety Switch?

I have a 99 yukon. when i went to start it onwe morning a month ago the shift indicator light was out and the speedo and tach were not working along with that, the transmission was not shifting properly it had no power and seemed like as it was in overdrive ?? stopped it ,started it up and worked fine and shifted fine for 5 days , then same thing goes . It happened back and forth every other day or so seems like electrical maybe >? computer? please help!

Could the parking pawl be damaged?

When I hear speedometer and shifting issues, I think about the vehicle speed sensor? I can't guarantee anything. Check for applicable trouble codes. Some of the national brand auto stores will check codes for free. If you want to check codes, yourself, at the least, you need an obd2 code reader.

Check for voltage on the wiring circuits in the diagram, go from there.

I am having difficulty printing the diagram.

Also, The guy that I bought the truck from removed his stereo system and put the stock one back in. Do you think it has something to do with it?

You can click on the diagram to enlarge, note the wiring colors. If you can't print it, hand draw it.

I don't know about the stereo system?

This morning my truck drove fine...but i have noticed that it has been taking it awhile to go into overdrive.....so i went down the street this morning same as ever but later i stopped to help a buddy work on his truck and parked in his driveway at a leaning angle so when we got threw with his truck i crunk up and started to leave and noticed my truck taking longer to shift and when it did shift felt like it went from first to third and then felt forth but no overdrive....i cant see the transmission going out that quick..no slipping...help please....

check the fluid level then scan for codes.autoparts do for free

I changed the fluid and strainer still same thing

then have a trans gu look at it your torque converter clutch may have gone out or a clutch pak/seal

It hasnt been slipping

if a seal goes out it won't slip because it won't engage have a trans guy look at it or continue to drive it like it is. 300,000 miles something is going to go wrong with it.

How many shift silenoid are they in there

Hello,

Here is a wiring diagram so you can see all of the solenoids and be able to test them.

https://www.2carpros.com/articles/how-to-check-wiring

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken