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Comments
What I did was add a qt. of Lucus transmission oil to help clean sticky valves. it did help, but it still does it every couple of months.
Just stop turn it off let it sit awhile and works ok.
????????????? who knows.
bought the truck july 5th was great for 3 or 4 weeks then
it started bucking or jerking going up grade, sometime at a stop light it would feel like someone hit me from the rear.
dealer says they can't find anything wrong.
also mpg dropped from 20 mpg to 16 mpg.
did your drop before your fix? and did your warrenty cover the fix?
thats the same truck i got.
What kind of problems were
you having.
Mine does the jecking thing
going uphill and feels like someone hit
me at lights
i bought my truck 4 door 1500 vortex max on july 5th
notice the leak a week later and they also said it
was the front trans pump seal from a nick on the torque converter shaft. do you have any other trouble with your truck jerking or bucking going up hill?
Thanks again.
A guy told me to check the brake light switch and make sure it was adjusted correctly, and it wasn't.
Everytime it hit a bump the pedal would bounce slightly and the switch was cancelling overdrive.
Truck has 190,000 miles.
It does not shift out of 1st unless you run it up alittle and let off the throttle and then I think it shifts straight to 3rd, not sure though, it feels like it is in between(doesn't feel like 2nd), and still pulls good. It does feel like it is shifting to overdrive at about 35-40 but not locking up. Rpm's seem to high for 3rd gear though.
Reverse works and it pulls fine. Will not shift manually, and if you put shifter in 2nd it disengages like you put it in neutral.
I changed fluid and filter, and 2 shift solenoids(1-2 & 2-3) first, still the same.
Changed pressure silenoid and it did make it(when it does shift)shift harder.
It has not set any trouble codes.
Anything would be helpful, Thanks
Question: Is it better to drain oil and change filter or have transmission back flushed?
An analogy is the radiator coolant - drain, fill with water, drive around, and drain again and refill w/new coolant. This gets out all the coolant that is sitting in the engine block that doesn't come out when you just drain the radiator.
1offroader
sounds like draining is right for me, my 4l80e transmission has a drain plug.
What about changing filter,
I had transmission oil changed at GM dealership (60K). Nothing was said about a backflush so I am sure I got a oil/filter change.
Truck now has (77K)
Do you change filter and oil every 30K?
I have a 99 Trooper, it has a GM trans in it, you can't even get inside to change a filter (if it even has one), I just drain the ATF and refill. No trans probs at 70K.
1offroader
Check to make sure that the shift linkage is adjusted correctly. There are detents in the column shifter for each gear, and there are definite "notches" on the shifter arm on the trans for Park, Reverse, Neutral, Drive, 2, and 1. If your column shifter says you are in Drive, but the trans shift arm is not all the way in Drive, you can have weird problems.
Disconnect the linkage at the trans. Move the trans shift arm into Drive - it will click firmly into place. Move the column shifter into drive, if necessary have someone hold it exactly in place. If necessary, adjust the linkage such that Drive on the column and Drive on the trans shift arm are aligned. Don't align Park with Park, because when you shift the trans into Drive it may be slightly misaligned causing strange shifting behavior.
Also, the shift linkage may be sloppy from age on a 1985. I'm not sure, but there may be some shift linkage bushings & etc. that can be replaced to tighten everything up and make aligning the column shifter and trans shift arm more precise.
Is that a clear explanation? The mechanic might have done this but it doesn't hurt to check, it's easy, quick, and free. Good luck.
1offroader
Experiencing slack on takeoff -
Transmission?
U joints?
Any ideas?
Any help appreciated!
John
How do I tell if it has the Allison?
One other option...run it 95mph and if your only running about 2600rpm on the tach...it's an Allison...LOL
Hope this helps!
IJUST WANA ASK YOU HOW TO PROGRAM MY OTHER REMOTE CONTROL
AS I HAVE TWO REMOTES BUT ONE IS WORKING FINE BUT THE OTHER ONE IS NOT PROGRAM
THANKS
they ordered all new stuff. it has 18,000miles and hasent missed a beat. I had a cat back system put on it at 17,000miles so it could expell more exhaust. sounds better seems to run better and i have picked up mpg from 10.6 to 11.5. also at about 17,000miles it has picked up some pep at low speed. good luck.
The idiot at the car lot was right. The slave cylinder is bad. Near the clutch actuating arm is a smaller clutch slave cylinder. There is a piston inside, and it has seals on it that can go bad, just like on a brake wheel cylinder. Sometimes they can be honed out and rebuilt with new seals, sometimes not. It is a common problem.
It could also be the clutch master cylinder, but check the slave first. It is smaller, easier, and cheaper to replace than the master.
Sometimes pumping the clutch pedal works, just like pumping the brake pedal when the brake master cylinder or wheel cylinder goes bad. But that's just a temporary solution until you can get it home and replace it.
1offroader
Will a transmission fluid leak affect only the high gear. It will pull in the lower gears up to about 35mph, but not in the high gear. It was a quart low on fluid and has been leaking what we thought was oil?
If anyone can please help my brother out, he is a perfecitionist with everything, especially his vehicles. He has spoken to mechanics, and the dealership he bought the used truck from and nobody can help him out. Any advice??? Thank you.
It's a 8.1lt with a 5 speed auto. I bought a $ 2,500.00 24 month warranty with it and I think the dealer does not want to fix the tranny, I've had a lot of trouble from the start. Does anyone know the GM main customer service phone number??? :lemon:
the truck will not go over 40mph or so the engine redline. so i assume is the tranny. i changed the fluid today it was a little dark, no metal visible, no burnt smell. no short when i took off the pan or around it, all fuses look good. btw the trany was rebuild dont know when. any help will be appre tk for the help
Also my message center will say Reduced Engine Power when I start it sometimes. When this happens I have no throttle and all I can do is idle. If i turn it off and let it sit a few minutes everything is back to normal. Any ideas?