Question about 1996 Chevrolet Suburban
1996 c1500 with 126xxx miles on it. Runs well around town but after highway running for about 20 min, the tranny begins to violently shift into second and third. Check engine light is on, but its always on. Any thoughts?
You should have a P1870 error code stored, which is telling you the transmission is slipping. Reason for it is there's a bore inside the valve body that gets worn out; repair involves either replacing the valve body, or using a kit to **** the bore out to sleeve it. Either is acceptable and honestly the kit seems more like a long-term fix to me.
Any HONEST transmission shop will only charge you a few hundred bucks at most for this.
The problem isn't correcting because the transmission cools off; the code is cleared out when you're turning off the engine, and it takes a little while for it to set again. This is consistent with the behavior for the P1870 code. In a nutshell what is happening is the computer detects the transmission slipping a little due to loss of pressure from the internal leak, and boosts the line pressure in an event to save the transmission. This results in the harsh 1-2 shift. The other shifts are firmer too but they're softer by design than 1-2 so you don't notice it nearly as much, if at all.
Posted on Jun 24, 2009
This maybe an cheap fix.
The 1996 Chevy Sub has a Transmission speed sensor. If you can take a look at this link http://www.1aauto.com/1A/SpeedSensor/Chevrolet/Suburban/1ATRS00012/1073324?utm_source=google_base&utm_medium=cpc&utm_campaign=google_base
In my experience I see this go out more than a transmission. and not to hard to replace.
Posted on May 24, 2009
If you like go ahead and let someone sell and replace your transmission but here is my suggestion! Check around and see if you can find a minor vacuum leak! This can simply be the big round hose that goes from the fuel injection to the power brake hub! This is normally a push in connector which has about a 1/2 inch hose clamped on it! If there is any kink or the connector is not in correctly a leak will occur and the transmission will shift rough as though you will be thrown out of the vehicle! Try unplugging this connector and plug it back in hard and straight and maybe you will be lucky and fix your problem. If the vacuum is correct your transmission will shift better than you have ever experienced!
Posted on Aug 16, 2009
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Posted on Jan 02, 2017
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