98 Blazer, A/T, 4WD, stuck in highest gear in range.

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01-30-2010, 11:07 AM

gsmollin

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Join Date: Feb 2006

Posts: 19

gsmollin is an unknown quantity at this point

98 Blazer, A/T, 4WD, stuck in highest gear in range.

I think that's what it's doing. Here are the symptoms:

1. Park works.
2. Reverse works.
3. Drive range 1 can move the vehicle from a stop.
4. Drive range 2 can move the vehicle from a stop at a higher gear ratio than 1.
5. Drive range 3 won't move the vehicle from a stop.
6. Drive range D won't move the vehicle from a stop.
7. No upshifting from drive range 1 or 2.
8. After the vehicle is moving, drive range 3 and D begin to work above a minimum speed. The transmission downshifts on a hill. Below a minimum speed, drive 3 and D will cease to move the vehicle, and a manual shift into 2 or 1 is required.

What do you think?

01-30-2010, 11:52 AM

swartlkk

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Join Date: May 2005

Location: Waterloo, NY

Posts: 41,137

Sounds like this could be your problem:

Quote:

Originally Posted by swartlkk

Common failures for the 4L60E

symptom -> cause -> any possible repair

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

-OR-

No forward movement in OD or D, but L2, L1 and R work: Forward sprag is broken. R&R. Try not to run or drive the car or further damage could result.

I would bet money on the Shift Solenoid B problem though. Typically this is also accompanied by a code for that solenoid:
P0756 - Shift Solenoid B Performance or Stuck Off
P0758 - Shift Solenoid B Electrical

01-30-2010, 03:43 PM

JoDan

Join Date: Jan 2010

Posts: 1

I'm changing the shift solenoid b also on a 98 blazer 4wd and i was wonder if it was the drivers side or passenger side solenoid... they look identical need some help. Thanks.