How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim's Auto Repair Your Own Question
Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 16027
Experience:  Have owned a repair shop for 25 yrs.
Type Your Car Question Here...
Tim's Auto Repair is online now
A new question is answered every 9 seconds

1999 Olds Bravada 4.3 Full time 4 wheel drive. 105000 miles

Customer Question

1999 Olds Bravada 4.3 Full time***** 105000 miles
Sometime hard shifts from 1-2 gear
Got the p1870 code Looked it up on Youtube and several videos suggested changing the two solenoids for 1-2 shift and 3-4 shift. Dropped the pan did everything mentioned in the videos. Pulled the little clip out , put new solenoids in and replugged the wires correctly. Put it all back together and it will not shift out of 1st. Have reverse has 1st gear and thats it.
Where do I go from here?
.pulled the little clip out
Submitted: 1 year ago.
Category: Car
Expert:  Eric replied 1 year ago.


Ok, is the P1870 code still present?

I also need the last 8 of the vin to check for related service bulletins, which I believe there is one for this

Customer: replied 1 year ago.
vin last 8 digits X2700470
Customer: replied 1 year ago.
I did not clear the code after I put it back together. I not have the battery disconnected to clear the codes
Customer: replied 1 year ago.
I NOW have........the battery disconnected
Expert:  Eric replied 1 year ago.


Ok, let me know if the code returns.

On this vehicle, there is a service bulletin out stating that the P1870 code is for internal transmission component failure - valve body, torque converter clutch, fluid pump, or other issue, and not due to the solenoids.

Once you see if the code returns or not, let me know

Customer: replied 1 year ago.
The code is clear and still no shifting out of 1st gear.......heading to transmission shop. Not happy with response.
Expert:  Tim's Auto Repair replied 1 year ago.


i would think your problem is that new 1-2 shift solenoid you installed,,

it did work before you replace,i would think the new one is bad..both the 1-2 and the 2-3 are the same..remove the 1-2 and install one of the others that you removed,