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

5,355

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

1 of 1 people found this helpful.
Best Answer
96,655

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 of 1 people found this 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 of 1 people found this helpful.

is it the same thing as a solenoid?

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

5,355

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

Yukon

Looking for a Used Yukon in your area?

CarGurus has 20,300 nationwide Yukon listings starting at $1,495.

ZIP:

Search GMC Yukon Questions

GMC Yukon Experts

#1 clayduster71
clayduster71
Reputation 2,390
#2 David Boccabello
David Boccabello
Reputation 730
#3 Danielle Heller
Danielle Heller
Reputation 530
View All

Related Models For Sale

Used Chevrolet Tahoe
579 Great Deals out of 32,753 listings starting at $1,500
Used Cadillac Escalade
197 Great Deals out of 10,826 listings starting at $2,500
Used GMC Yukon XL
226 Great Deals out of 12,477 listings starting at $1,495
Used Chevrolet Suburban
282 Great Deals out of 19,161 listings starting at $1,995
Used GMC Sierra 1500
779 Great Deals out of 68,588 listings starting at $1,800
Used Ford Expedition
415 Great Deals out of 24,077 listings starting at $1,500
Used Chevrolet Silverado 1500
1,911 Great Deals out of 182,352 listings starting at $1,595
Used Ford F-150
2,144 Great Deals out of 195,014 listings starting at $290
Used Ford Explorer
901 Great Deals out of 65,282 listings starting at $799
Used Jeep Grand Cherokee
1,069 Great Deals out of 73,671 listings starting at $1,200
Used Dodge Durango
276 Great Deals out of 21,215 listings starting at $1,500
Used Toyota 4Runner
229 Great Deals out of 19,027 listings starting at $2,195
Used Lincoln Navigator
81 Great Deals out of 5,711 listings starting at $1,900

Used Cars For Sale

2017 GMC Yukon For Sale
47 Great Deals out of 11,251 listings starting at $40,499
2016 GMC Yukon For Sale
25 Great Deals out of 867 listings starting at $34,995
2015 GMC Yukon For Sale
45 Great Deals out of 1,630 listings starting at $29,391
2014 GMC Yukon For Sale
18 Great Deals out of 367 listings starting at $19,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.