Question about 2004 Chevrolet Avalanche
Drive works, but when I put it into Reverse it doesn't move- power mirrors move;then engine just revs.... got it to go once into reverse but chugged, then jerked -then finally reversed-(barely)
drive seems ok - no check engine or lights on-seems to shift fine when driving....we drove home ok...only when we went to back in our driveway!
any ideas PLEASE help--I just bought it(private sale) and I mean just bought TODAY. Do I have a serious tranny problem or linkage etc -- any thoughts would be great - although I cannot tell you much about vehicle as I have only owned it for about 4 hours now.
There are no synchros in a automatic! And the 4L60E is a 4 speed They do not use this trans in Jeeps either.
A manual trans has synchros but not a valve body as the driver of the vehicle shifts it.
Posted on Apr 03, 2009
Chances are you have a transmission problem. If its just reving it means the transmission isn't catching. I would take it to a transmission specialist right away and be sure to call the seller. I would ask for your money back or have the seller pay for the repair cost, which may be a lot. Advice for the future: Always test drive the vehicle so you don't get ripped off.
Posted on Feb 05, 2009
It's a good bet that the synchro for reverse is completely shot. The linkage is highly unlikely, as if it were mis-adjusted or damaged you would not likely be able to shift into park. A mis-adjustment to that side would cause you to actually be in reverse when it indicates park, so we can rule that option out. Also, the shift solenoid is not a likely culprit in this case since you're shifting upward through forward gears just fine. I hate to say it, but it's pretty likely that synchro. Another possibility, though not very likely, is a plugged region in the transmission valve body. Although I don't think this is probable, it would be the least expensive and easiest to check. To check this, you can drain the transmission fluid, remove the pan, and visually inspect the lower valve body. While you're at it, it might be a good time to chage the transmission fluid filter. If the lower valve body shows no clogging or damage in any of the ports, you will need to disassemble the valve body and inspect the upper region where the actually "brains" of the transmission are. If you're not comfortable with delicate mechanical work, I'd really recommend taking this job to a skilled mechanic. Unless you are working in a very clean area and have experience and patience for working with very small parts, you're likely to have an upset. The valve body consists of many "galleys". Some automatic transmission rely on ball bearings that act as check valves. Others do not. For the most part you can safely remove the valve body without losing parts, but if it appears damaged or clogged and dirty, cleaning it would, again, be best left to a mechanic skilled in transmission work. Not every mechanic is a good transmission mechanic. Even after nearly 30 years of experience I hesitate when it comes to transmission rebuilds because of the specialized tools and amount of time and patience they take. Let me know if this helps, and if you don't find the problem there, we can keep trying.
Posted on Feb 05, 2009
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Posted on Jan 02, 2017
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