Tranmsission Problem????

[GM Customer Service]

I can understand completely how a supposedly unrelated system can and will affect something else. I've never seen a vehicle more tied into computers than these.

I'm an accomplished shade-tree mechanic type but I don't mess with transmissions other than to remove them and replace seals (I'm doing just that with my 96 Bronco).

The Throttle Position Sensor makes total sense as does the MAP and/or MAF sensors.

My hope is that the dealer will do whatever voodoo they have to, to find the problem. I know there should be pressure and function tests that they can run on the tranny to locate any problems and I believe they'll do that. I've already tried to pull the codes on my OBDII reader but none are there, so whatever happened did NOT set any trouble codes.

The dealer we go to has been pretty good about fixing stuff either on our now sold GMC or on this Tahoe.

In any event, the wifeoid is taking the truck to the dealer this AM and I'm confident that I'll hear something later this morning or this afternoon.

Will keep y'all posted.

Hello LJPinDaytonNV,

I read your update on this post as well and I am sorry to hear that you had a bad experience at the dealer. I am interested in learning about your visit at the dealer. Please private message me the details.

Thank you,

Jennifer T.,
GM Customer Care

 

[LJPinDrakeND]

You might be right. I may do just that.

I'm still waiting for the the service "gurus" to get done with their voodoo sacrifices and let me know what they found out. They were supposed to drive it cold this morning and either they did that, found nothing, and are waiting to make it seem like they did something; or maybe the gremlin popped up thinking I was driving and the service dude noticed it.

I'm going to give them a call in about an hour to find out WTF. So we'll see then.

 

[LJPinDrakeND]

Final Update,

Got the vehicle back from the service department. They said they pulled the transmission pan and there was no shavings or pieces evident. Also, drove it all around town. Nada. Bupkis.

Sooooo...........I'm going to check and maybe replace a few of the sensors that have been mentioned here. MAP, MAF, TPS (if I can find it. I haven't found one listed yet). See if that changes anything at all.

Will advise if it happens again.

 

[TheFuzz]

Well, that is reassuring. At least you know you aren't driving a ticking bomb...for now.

Keep us posted on the sensors. Now that you've ruled out a hard part failure, I wouldn't be too overly concerned about the TPS unless the temps rise to dangerous levels or you start getting those random gear slippage issues more regularly.

I'm assuming that your fluids are in good shape, too? Did they at least replace the trans filter while they were in there?

 

[LJPinDrakeND]

I don't know if they did or not however, about a month and half ago, we had the 60K tranny service done so I'm presuming they replaced it then. The fluids were really bad then so I can only presume they did.