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I've disconnected the battery but still nothing.
Also, the head gasket just went and we replaced it, but now the truck is running rough, like there is a vacuum loose. Any suggestions.
Thanks
Jenn
It has been making some occasional klunking noises the last few weeks. It has also developed an annoyingly loud whine that goes along with wheel speed, and isn't affected by turning, braking, accelerating or shifting. The whine may be a secondary problem caused by wheel bearings, UJs or the like.
Any ideas? Transmission? Rear differential? Something else? I've got to tow it, so what kind of shop should I take it to? I'd take it home if it was something that could be rebuilt in place, but I don't feel like dropping a tranny. Any suggestions? I have been wholly unimpressed with the dealer in terms of both price and service (I am in San Diego).
1998 GMC Jimmy, 4WD, 3.8 V-6, Automatic Trans .......
2 problems ....... replaced my transmission back in January .... it had been "banging" going into 2nd gear after driving a bit and everything was heated up, then began slipping and eventually went completely.Got a junk yard unit and installed and all was good for about 10 months ....... recently this transmission has begun doing the SAME thing ..... 15 minutes of highway driving usually and the first stop you come to ...... shifts VERY hard and bangs into second. Check engine light comes and goes. Someone told me there is a valve that sticks for the lock up torque converter and it needs to be replaced. Anyone have any experience with this problem?
2nd ........ my 4WD operates however ....... there is ALWAYS vacuum applied to the vacuum cable actuator located under the battery. I removed the vacuum line for now so i can drive in 2WD and if I need 4WD I have to re-apply the vacuum hose.
Does anyone think perhaps the 3 port vacuum switch located on the top of the transfer case could be stuck or damaged allowing vacuum there all the time? I have removed the connector and made sure it is on the right position. It is keyed so it would be difficult at best to put it on wrong. If this is a good possibility ....... is it difficult to replace by yourself or does this have to go to a shop? I saw the switch on line for between 25 and 35 dollars.
Thanks all for any input I can get and good luck to you all!
Does anyone know if that is something I could reasonably look at myself without a bunch of specialty tools? I have rebuilt several engines, replaced cv joints, rotors, and wheel bearings, but I have never cracked a transmission or a transfer case. Would you normally rebuild it in place, or replace the whole thing? Has anybody had to deal with this problem, to give an idea of the cost to repair?
Thanks
As for the flashing lights for the 4 wheel..i'll have him check the vac switch as woodsman3 suggested. Thanks for the advice!
Jenn
replaced TC switch on TC motor, the old switch was definitely shot and there is vacuum to the actuator under the battery tray, when the hose is disconnected the cable moves, afterwards disconnected the battery in an attempt to reboot the TCCM to no avail
1. since the dash lights are responding correctly as to whether or not 4wd is engaged/disengaged does that mean the sensor on the front diff is working properly?
2. because i have vacuum to the actuator then the lines should be good, right?
3. where and what are any other sensors or switches i need to check?
4. how do i tell if the encoder motor or the TCCM (i hear clicking when button on dash is pushed) is bad?
any help is appreciated
Any suggestions ?
Any advice would be appreciated.
I have a 99 GMC Jimmy that will engage in 4 wd with the auto button, not when you try to push the 4 HI button. Can't get it into 4 Lo either.
Any ideas will be welcomed...I
Disd you ever get a reply or solution to this problem?
I see the same thing with my son's Jimmy and if you found the fix, can you letme know please.
Thanks any help appreciated.
Goodyguy~
I havent done anything behind the dash. However It has been raining and maybe something under the jimmy is shorting out.
I will try to see where the wires lead to and connect to the transfer case?
And you definitely haven't done anything to the switch wires (such as installed a new stereo, etc.)? And nothing else is shorting out?
button is pushed as long as the gear shift is in neutral. but if you push either button while in drive even while stopped the fuse blows. and the only way to get it working again is to disconnect the battery again. It used to not matter if you were in neutral or not when going to 4wd. and the owners manual agrees that you do not need to stop and shift to neutral to go to 4-hi but only when going to 4-low
any ideas?
I still think you have a wire shorting out somewhere (causing the blown fuses). As a wild guess... what if the hot lead from the dashboard switch (going to the vacuum switch on the intake manifold) was shorting with a wire from the steering column? They might be sharing space in the same wiring harness as they pass through the firewall.
Has no one else on this board had the same problem? Or at least have better knowledge of the 4wd wiring?
Ok I took my truck to a steep dirt hill to see if the 4wd actually works.
I stopped at the bottom put my truck in neutral pushed the 4-low
button heard the klunk sound like it engaged. The 4-low light stayed on I put it in drive and started up the hill got to a place where the back wheels were spinning I opened the door to see if the front wheels were spinning too but they weren't.
So I had to back down the hill put it in neutral pushed the 4-hi button it lit up so I tried the hill again same thing no spin from the front wheels. So what next?
Thanks
I went to get an inspection sticker and got rejected for safety reasons. I was told at the garage that they knew it was the h & b because they were able to move the tire (the truck was on a lift just off the ground) left/right when they grabbed it and it shouldn't do that. I was told not to drive it. A second opinion told me a tire that can be shaken left/right is either a tierod or sway bar. I also want to mention the front end is out of alignment.
I am afraid to drive it, but truly have not other means of transportation. I thought I smelled something burning when I got out of it earlier but am so hyper-aware that there is an issue, I am not sure.
Any suggestions on how best to proceed would be appreciated.
Thank you.
Don't worry, I have accidentally done this too!!! You will get a answer quicker if you create a new thread. Good luck with your problem
reposted
thank you
Not necessarily. Many members use the My Watched Items forum tool and subscribe to certain discussions and miss new ones.
CarSpace is a conversation based forum and the more general discussions (like Chevy Blazer GMC Jimmy Maintenance and Repair) have threads that meander all over.
Just different strokes.
Thanks DJ
My 4 wheel drive will not work on my 1995 GMC jimmy. Mechanic said it was the cable. I have no idea, so I go on the intenet and buy a ACDELCO US 15721261 Trans Shift Cable
4wd ; 4-speed At (m30) ; Chevrolet (x88) ; Gmc (z88); Years:1995-1996; Per Car Qty:1; from Bestvalueautoparts. You quessed it WRONG cable.
My mechanic said the cable is about 18" to 24" long. Thats it no other info.
Does any one here have an idea what cable I need and where to get it?
Thnaks for any info
Frank
Thanks Again ,
Frank