Transmission not shifting


Asked by Feb 23, 2016 at 09:11 PM about the 2007 Chevrolet Suburban LTZ 1500 4WD

Question type: Maintenance & Repair

Starting from a stop car is at 20 mph and rpms are bt 3/4.  
In order for it to shift I have to back off the gas down to 2
mph. Then it will shift but not into 2nd shift. Running 55
mph with 4rpms and in 1st shift.  Changed transmission
fluids still n the same nothing in fluids.  Has 230000 miles.
Transfer case we did have to do a weld bc of a small whole
and leaking oil on the back of the truck.
Would the t case have something to do or is it something
Oh and NO check engine light. Even had it tested to see if
the light was burned out.

3 Answers


The only thing you can try now is add some Lucas Transmission Stop Slip or there are other products that say they can fix transmission problems but I have used Lucas before and it worked for me. Do not over fill transmission remove same amount of fluid as bottle of product. If this does not work time to get some transmission work done.


Transmission, most likely. With those miles and weight of the vehicle its tired, salvage tested trans would be my choice.


I'm sorry to tell you this, but, not shifting from 1st to 2nd is a classic transmission problem, very typical. If you're lucky, it could just be a bad speed sensor. Look that up, and check that out. I had a bad speed sensor on my 1995 Honda Accord and it didn't shift properly, but, it was not the transmission. Good luck.

Your Answer

Add photo

Related Questions

  • Transmission shifts at inappropriate RPM 1 answer

    I have a 1991 2500 4x4 Chevy Suburban. Local mechanic came up with shift solenoids bad per code reader. Took to Aamco and mechanic drove vehicle and diagnosed a late and harsh 2-3 and 3-4 shifts.Tra...

    1991 Chevrolet Suburban V2500 4WD


    Maintenance & Repair

  • 1994 Suburban wont shift automatically 1 answer

    The other night, a teenager jumped in front of me, I slammed on the brakes. when i went to go again, I pressed the accelerator pedal, the truck barked the back tires, then nothing. I dropped it into 1...

    1994 Chevrolet Suburban C1500


    Maintenance & Repair

  • Transmission problem 1996 Suburban 3 answers

    While in drive, vehicle will shift once then at or around 20 - 25 miles per hour the engine will race but transmission will not shift. I replaced transmission filter which was dirty but transmission ...

    1996 Chevrolet Suburban


    Maintenance & Repair

  • Transmission ?? 3 answers

    I have a 2001 Chevy Suburban. Just put a brand new transmission in back in January. Yesterday going down the interstate it started acting up. It was hard to drive. It was like I couldn't catch any ...

    2001 Chevrolet Suburban LT 1500


    Maintenance & Repair

  • my 350 turbo transmission will not shift in to a high gear. 2 answers

    my 350 turbo transmission will not shift in to a high gear. what could be the reason for it ?even when I use the gear shift on the column it will not get out of low gear.

    1976 Chevrolet C/K 10


    Maintenance & Repair


Looking for a Used Suburban in your area?

CarGurus has 24,063 nationwide Suburban listings starting at $1,500.


Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Eric Fritz
Eric Fritz
Reputation 810
#2 Andrew Olsen
Andrew Olsen
Reputation 800
#3 Neal Turner
Neal Turner
Reputation 710
View All

Related Models For Sale

Used Chevrolet Tahoe"
1,076 Great Deals out of 36,074 listings starting at $1,700
Used GMC Yukon XL"
235 Great Deals out of 14,200 listings starting at $2,575
Used Ford Expedition"
582 Great Deals out of 21,660 listings starting at $2,111
Used Cadillac Escalade ESV"
162 Great Deals out of 6,106 listings starting at $2,499
Used GMC Yukon"
566 Great Deals out of 19,456 listings starting at $2,500
Used Cadillac Escalade"
363 Great Deals out of 11,306 listings starting at $2,999
Used Chevrolet Silverado 1500"
2,453 Great Deals out of 144,774 listings starting at $1,995
Used Lincoln Navigator"
126 Great Deals out of 6,055 listings starting at $1,999
Used Toyota Sequoia"
171 Great Deals out of 6,809 listings starting at $2,500
Used Chevrolet Silverado 2500HD"
402 Great Deals out of 33,527 listings starting at $2,499
Used Ford F-150"
3,272 Great Deals out of 216,647 listings starting at $1,500
Used Nissan Armada"
152 Great Deals out of 6,320 listings starting at $3,900
Used Dodge Durango"
406 Great Deals out of 22,644 listings starting at $1,400

Used Cars For Sale

2016 Chevrolet Suburban LTZ 1500 4WD For Sale
12 Great Deals out of 3,017 listings starting at $44,750
2015 Chevrolet Suburban LTZ 1500 4WD For Sale
21 Great Deals out of 568 listings starting at $36,158
2014 Chevrolet Suburban LTZ 1500 4WD For Sale
11 Great Deals out of 152 listings starting at $29,488
2013 Chevrolet Suburban LTZ 1500 4WD For Sale
25 Great Deals out of 332 listings starting at $23,000