This car has no reverse it is a auto trans. this car was running fine untill it was pick up and moved by a car hauler. I also can not find a dip stick to check trans. fluid level.

When you tow a vehicle -- a flat bed hauler -- is your best bet

Next would be -- to use a wheel lift to raise the rear wheels or
remove the drive shaft, so the trans does not have any internal
parts moving

Hard to say IF something was ruined or reverse was about to fail

When reverse goes on a rear drive GM trans, your pretty much going to be taking it apart & rebuilding it,as reverse is the first parts into the case & the last out on disassembly

Transmission fluid may need to be changed check level on dip stick

check your trans fluid then consider having the trans serviced

if the car is a auto matic start the car in park with the parking break on. under the hood you will see to dip sticks. one should be black "oil" the other yellow Transmission stick. with the car running pull the dip stick out wip off any oil on the stick. reinstall all the way pull it out again, you should have either 2 dots aproxmaintley 1" spread the top dot is where the trans mission fluied needs to be. if it is barley on the stick go to your local parts store ask what type of transmission it uses and buy a couple of quarts probley about 12.00 also get a tran. funnel to add the fluied. put a little at a time and check the stick untial it is on the top mark about2.5" from bottom of the stick. also if the fluied is not a redish color, have it changed. good luck

If your Vehicle will not move in reverse until you you reverse it up sound as thought your reverse pump in your trans has gone or getting ready to go out . It call worn out . So you will have to change the trans out for R&R trans it will run about $2000.00

If you have good reverse and bad drive it is not a low fluid condition.Low fluid will cause a slip in reverse before it does in drive.The modulator only creates a throttle reference based off engine vacuum and will not affect drive ingagement.If you suspect a low fluid condition just add two more quarts and see if anything changes. Overfull will not harm the transmission and the worst thing that can happen is some may come out the vent.If you want to check the length of dipstick the take the bolt out of the detent cable and pull cable out of transmission while engine is running , when fluid stops coming out the detent cable hole it is at the proper level and you can remark stick if need with a file.I suspect you have a forward clutch problem.I cut my teeth on these transmissions 25 years ago.Good Luck!

Are you refer to put it in reverse then you have to rev the engine to get it to move?

It's a good chance that you have a leak and the transmission is low on fluid,check the fluid with the engine warm and running in park or nutral,if its low. Add the correct type of fluid through the trans dip stick tube.. .a little bit at a time until the level is in the normal range. If this does not solve the issue, the pump in the transmission may be going out.

Keep us updated.

check oil level with engine running,handbrake on, chock drive wheels,and put in reverse ........now check oil level

ok... check your transmissino dip stick to see if the fluid level is regeresting on the dip stick. now this IS WHAT A LOT OF PEOPLE DONT KNOW.......NEVER I MEAN ....NEVER CHECK THE TRANSMISSION DIP STICK WHEN THE CAR IS NOT RUNNING, ITS OK TO CHECK YOUR OIL DIP STICK WHEN THE CAR IS NOT RUNNING.BUT YOUR TRANS IS DIFFERENT...... heres what you do...... START YOUR CAR...THEN PUT THE EMERGENCY BRAKE ON ...THEN PUT THE CAR IN NUTURAL....... NOW YOU WILL GET A REANING ON YOUR DIP STICK IFITS LOW THEN ADD FLUID.. REMEMBER ALWAYS CHECK THE TRANEE IN NUTERAL THE BRAKES ON AND THE CAR RUNNING.....HOPE THIS HELPS. GOOD LUCK...........