4L80E Automatic Transmission Problem in Reverse

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4L80E Automatic Transmission Problem in Reverse

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
4L80E Automatic Transmission Problem in Reverse	Frank	12-9-07
1996 GMC Surburban CK2500 4WD, 454V8. Transmission pops out of reverse hard (bang) when backing down a slightly sloped or severely sloped incline. Usually on level surfaces it will not pop out unless you give it some gas. Any ideas on a fix? Is it the sensors? Thanks Frank
Re: 4L80E Automatic Transmission Problem in Reverse	BUBBA THE BUS TECH	12-10-07
It sounds more like a transfer case problem. I have heard them bang like this when the gears in the ransfer case are fourced by beeing wound up by turning or difrent sized tires while in 4wd. If its an auto 4X4 system it may not be releasing correct. Either way it a damaged unit if bangs like that and needs to visit a specilist for diagnoses. Good Luck
Re: 4L80E Automatic Transmission Problem in Reverse	bighub	4-7-08
I have a transmission problem when my gears change it fill like someone hit me from the back.but when it is cold it shift ok but when it get hot that is when i have the priblem.can someone help me with this.
Re: 4L80E Automatic Transmission Problem in Reverse	Quincy Transmission Service	8-22-08
We rebuilt the tranny in an it surges in idle and sometimes kills the engine. It is a1998 chevy truck 2500 series 4by4. we also put a sure cure kit in it.