07 H3 auto trans coming in and out of lock up ~ 50 mph
#1
07 H3 auto trans coming in and out of lock up ~ 50 mph
My wife has an 07 Hummer H3, 5 cyl, auto trans. Recently at around 50-60 mph the auto trans comes in and out of lock up. Other than that it shifts and drives fine. I've searched but found mixed results, some say replace TCC solenoid or other items but I'm not clear on how I can test this to be sure that the TCC solenoid is the issue and also how to fix it. Any help is appreciated. Thanks! Chris
#2
How many miles on the trans, and how many miles since the last trans fluid/filter change?
When the 4L60-E can't hold full lockup, it is usually because of heat and crud.... and if you are over 100K miles, might need a rebuild. If you are lucky, a Trans fluid and filter change might be all that is needed, unless the crud already did some damage.
When the 4L60-E can't hold full lockup, it is usually because of heat and crud.... and if you are over 100K miles, might need a rebuild. If you are lucky, a Trans fluid and filter change might be all that is needed, unless the crud already did some damage.
#3
ah funny you mention that. It has 120K on it now, but fluid and filter were changed at 60. It definitely needs it again. My wife drives hard. It also has a ruptured oil cooler line (it rusted away and now has a pin hole), which I am also fixing. Sounds as if I should fix the cooler line, flush and replace the filter and see if that addresses the issue. Thanks!
Thread
Thread Starter
Forum
Replies
Last Post
greg260
PRIVATE For Sale / Trade Classifieds
6
01-27-2018 12:41 AM
CCAnger5404
PRIVATE For Sale / Trade Classifieds
10
04-24-2015 02:37 PM
bluedoggy
PRIVATE For Sale / Trade Classifieds
5
08-26-2009 03:05 AM