We just changed our transmission filter & everything seems to be working fine now but the rpm is going to high and won't shift after 3rd does anyone know what we should do?!

Asked by Jan 04, 2015 at 10:15 PM about the 1999 GMC Yukon

Question type: Maintenance & Repair

12 Answers

4,915

Did you have the shift problem before you changed the filter? Have you checked the fluid level since you filled it?

1 out of 1 people think this is helpful.
Best Answer
83,175

If you didn't get the filter attached properly it could be sucking air causing the shift problem, but I would try resetting the ECM first to see if that helps. If not then I would drop the pan and double check the filter.

Best Answer

Depending on the transmission.Many gm trans. have an A and B switch in the trans. When you removed the trans. pan , is it possible you knicked the switch (a miniature motor really) in the trans?. A controls gear 1 and 2. B gears 3 and 4.The tabs on these motors are very delicate and break off them easily.

1 out of 1 people think this is helpful.

http://www.pepboys.com/product/details/9306314/00166/parts/drivetrain_ cv_axles_transmission/automatic_trans_switches_relays

http://www.pepboys.com/product/details/9791756/00166/parts/drivetrain_ cv_axles_transmission/automatic_trans_switches_relays

Yes I had the shift problem before I changed the filter that's why we changed the filter, & it's running smoother and seems better but it won't shift gears after 25-30mph & what's the ecm & how do I do that?

& fluid leval is fine we put 6quarts

& if we knocked one off those switches off how would we know and how do we fix it?

The switch is easy to check, once inside of pan again. Look at the 2 wires on the switches ( they're actually little electronic motors). If any tab is broken replace it. It is held on by a small fastener behind the actuator. Check the link I shared and it should show the switch upclose as well as hardware. It sounds like the B switch.Classic symptom you describe.

1 out of 1 people think this is helpful.

is it the same thing as a solenoid?

please send link again it's not letting me go to it

4,915

I think it's either the 3-4 accumulator spring in the valve body maybe broken or the 3-4 clutch discs in the transmission are worn out. Anyway I just found a Tech Manual for your trans. http://www.grail-ss.com/GRAIL%20Website%20Files/4L60ETechGuide.pdf

Your Answer

Add photo

Related Questions

  • Headlights won't turn on 9 answers

    My Yukon has auto headlights that turn on at night. Leaving the gym last night they wouldn't turn on auto or manually. The parking lights were on dim and my high beams would work. Its both the lf/rt l...

    2000 GMC Yukon SLT 4WD

    -

    Maintenance & Repair

  • Low oil pressure mind boggled 10 answers

    2006 GMC Yukon Denali AWD

    -

    Maintenance & Repair

  • back brakes arnt stoping my suv anyone know y 4 answers

    i resently changed my back brakes on my 1997 gmc 4 door 4x4 suv has drum brakes on the back and disk on the frunt my my back brake pads dont hit the drums and only wants to stop on the 2 frunt brakes

    1997 GMC Yukon SLE 4WD

    -

    Maintenance & Repair

  • help!! what do i do? 13 answers

    when I start my 1997 GMC Yukon everything is fine but when I tried to take it from park to reverse or drive or anything for that matter, the gear shifter is really loose and it wont go into any gears....

    1997 GMC Yukon SLE

    -

    Maintenance & Repair

  • Car 2 answers

    I have a automatic 1996 Yukon 2wd &it starts &was running great I even jes gotta new oil &transmission fluid &transmission seal change but when I start it my truck still won't move after I put in ...

    1996 GMC Yukon

    -

    General

Yukon

Looking for a Used Yukon in your area?

CarGurus has 16,880 nationwide Yukon listings starting at $2,495.

ZIP:

Search GMC Yukon Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Yukon Experts

#1 clayduster71
clayduster71
Reputation 2,000
#2 Danielle Heller
Danielle Heller
Reputation 450
#3 David Boccabello
David Boccabello
Reputation 390
View All

Related Models For Sale

Used Chevrolet Tahoe
858 Great Deals out of 27,927 listings starting at $1,700
Used Cadillac Escalade
298 Great Deals out of 10,229 listings starting at $1,900
Used GMC Yukon XL
339 Great Deals out of 12,005 listings starting at $2,400
Used Chevrolet Suburban
552 Great Deals out of 19,311 listings starting at $1,964
Used GMC Sierra 1500
1,020 Great Deals out of 59,989 listings starting at $1,299
Used Ford Expedition
481 Great Deals out of 24,640 listings starting at $1,500
Used Chevrolet Silverado 1500
2,584 Great Deals out of 151,149 listings starting at $1,500
Used Ford F-150
3,035 Great Deals out of 207,247 listings starting at $1,990
Used Ford Explorer
1,114 Great Deals out of 71,365 listings starting at $799
Used Jeep Grand Cherokee
901 Great Deals out of 66,427 listings starting at $300
Used Dodge Durango
378 Great Deals out of 23,107 listings starting at $1,300
Used Toyota 4Runner
367 Great Deals out of 20,645 listings starting at $2,495

Used Cars For Sale

2017 GMC Yukon For Sale
4 Great Deals out of 4,686 listings starting at $43,906
2016 GMC Yukon For Sale
34 Great Deals out of 2,175 listings starting at $37,499
2015 GMC Yukon For Sale
54 Great Deals out of 1,387 listings starting at $32,995
2014 GMC Yukon For Sale
22 Great Deals out of 446 listings starting at $23,500
2013 GMC Yukon For Sale
61 Great Deals out of 957 listings starting at $14,995