Pontiac Montana sv6 2007

Asked by Mechanicswife Sep 17, 2015 at 07:00 PM about the 2007 Pontiac Montana SV6

Question type: Maintenance & Repair

Hello,
I am having a problem with my 2007 pontiac montana SV6 i was going uphill
and stopped to turn at a light and it stopped moving forward. I could and can
still run in reverse no problem it has great power in reverse. I have since
bought a new transmission from the autowrecker and it still has same
problem. Then I purchased from GM a new pressure control solenoid, have
checked the valves all free moving still and still same problem van only goes
reverse. I am considering changing the other solenoids the 1-2 solenoid and
the 3-4, plus trying a new catalytic converter. which would pretty much
almost rebuild tranny do these sound like the next step or has soeone else
had a similar problem and know the right fix? Any input is valuable thanks

188,355

Paul answered 8 years ago

Transmissions are difficult to work on and troubleshoot. If you can change the solenoids with no problem then go ahead, at this point what do you have to lose...

Mark helpful

Guru9ZQPHN answered 3 years ago

Is it possible to increase the viscosity of the ATF somehow? When I used ATF in the front shocks of my motorcycle it gave about 15w I wonder if raising the montana atf viscosity to 30w would get it moving forward.

Mark helpful