1999. When I reverse out of driveway then shift to move forward, why does engine fail?

Sounds like the transmission is shifting into both reverse and a forward gear at the same time. Time for a tranny overhaul. But first check the transmission fluid level.

I forget the name, but it could be the shift connecttion. It the connection point behind the shifter in the car and the transmission. The port disconnected mine in my car cause they couldn't figure out how to shift it. It basically put the car into nuetral. No forward no reverse. But engine runs fine.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/chris_e1fb7ef6a5bdb086

Transmission is worn out,most likely needs to be rebuilt

I assume it is an auto by what you say. Is the O/D light blinking any codes? It is common in that model for the shift solenoids to fail, one or both, and the transmission then cannot find low gears forward.

Get a readout of trouble codes from a mobile come-to-you mechanic, or your own OBD reader, to see if that is it.

You can try shifting into manual 1 to get moving then once you get going shift the lever up into Drive. This should work, then drive it to a shop to have your ****** looked at.

just like the armstrong siddleys from when i was a kid ,they had a freewheel device which was mechanical but this is electronic controlled and without a circuit of the computer ECU i couldnt say but somewhere their is a sensor that is reading the RPM and if i knew what it was and how then overide it ,ask dealer if they can do it for you

my 1999 suburban will drive forward but it will not bafkwards?

check the fluid level some trannys are very sensitive to correct level

Arthur,

Shouldnt be a big deal.

Your shift linkage is probably bent.

You will need to go to a trans shop and get it fixed.

I highly recommend AAMCO since they warranty their work. They will have to "unbend" the bracket or readjust the cable play, or repair the linkage that places the car in the proper gear according to your indicator on steering column or dash.

Not a big deal...but then again you could have crushed the synchro gears, but i truly doubt it!

Thanks,
Mark

Sounds like the car is just slipping out of gear. Keep your hand on the shifter when you back up next time. See if you can feel the shifter move when the car comes out of gear. If the shifter moves up when it happens keep pressure on the shifter holding it back like you dont want it to move forward. And of course if the shifter moves back when it comes out of gear, put forward pressure on the shifter so it doesnt slip out. This might work for now but but i know i wouldnt want to spen 700 for that ****. Let me know how it goes.