NEED HELP 06 Denali won't move when in D

[KronikCanuck]

I have a 2006 Envoy Denali while driving at 60km/h last night I gave it 3/4 throttle and all of a sudden jerked once pulled up to a stop sign and truck would not move in drive so manually shifted into 3 nothing shifted to 2 and it drives once your moving you can manually shift it into 3 and shifts and drives fine then you can manually shift it into d and it shifts and drives but you manually have to put in 1or 2 to leave a dead stop anybody ever had this it's a 5.3 so should be a 4l60e transmission I have checked fuses and fluid level also no check eng light on truck only has 164,000 Kms on it

 

[Blckshdw]

I have checked fuses and fluid level

What was the condition of the fluid when you checked it?

 

[KronikCanuck]

What was the condition of the fluid when you checked it?

Fluid level was good and not dark or smell burnt

 

[KronikCanuck]

It shifts if you manually shift from 1 all the way up but can't start out in d or 3 acts like in neutral

 

[Mooseman]

When you put it in 2, it will start in 2nd gear. This is normal, used to move in slippery conditions (as per owner's manual). So you can move 2 to 3 to OD but 1 is dead, as if in neutral? Sounds like either something with the valve body (solenoid?) or 1st gear is just dead. Time to drop the pan and see what's in there. Metal chips/chunks, it's toast. Might need the help of a tranny shop to diagnose properly.

 

[KronikCanuck]

When you put it in 2, it will start in 2nd gear. This is normal, used to move in slippery conditions (as per owner's manual). So you can move 2 to 3 to OD but 1 is dead, as if in neutral? Sounds like either something with the valve body (solenoid?) or 1st gear is just dead. Time to drop the pan and see what's in there. Metal chips/chunks, it's toast. Might need the help of a tranny shop to diagnose properly.

I can shift it into 1st and manually shift through all gears and every gear works if shift manually. However you can not stick trans in d or third and take off from a stop if at a dead stop and have in d it just acts like in neutral. You have to stick it in 1or2 to take off from a stop

 

[coolasice]

Sounds like a toasted front sprag (rebuild needed).. Get a trans shop to look at it and see what they say.

 

[Bow_Tied]

@KronikCanuck , did you ever get this resolved?