99 Tahoe Tranny Question
#1
99 Tahoe Tranny Question
Hey all. New here. I have 182k miles on my 99 Tahoe LT 5.7. The last time I went to have it inspected (April) the guy told me I should have my transmission flushed due to discoloration and a possible burnt smell and look. Here is my freak out. I have heard NIGHTMARES about having this done only to then have the vehicle towed to a transmission shop for rebuild/replace/repair. I am second owner on the vehicle and honestly I know I have never had the transmission fluid changed nor flushed (please dont start throwing shoes at me).
To make my worrying even worse, it has just recently started to tremble when I mash the gas at high speed to make a passing manouver. I saw an older post about checking the mounts but mine are all in great shape.
What do you guys think? Take it to a tranny shop and bend over OR take the plunge and get the flush done and roll the dice? I am going to Vegas in a few weeks....
Thanks!
Patrick
To make my worrying even worse, it has just recently started to tremble when I mash the gas at high speed to make a passing manouver. I saw an older post about checking the mounts but mine are all in great shape.
What do you guys think? Take it to a tranny shop and bend over OR take the plunge and get the flush done and roll the dice? I am going to Vegas in a few weeks....
Thanks!
Patrick
#2
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Hey all. New here. I have 182k miles on my 99 Tahoe LT 5.7. The last time I went to have it inspected (April) the guy told me I should have my transmission flushed due to discoloration and a possible burnt smell and look. Here is my freak out. I have heard NIGHTMARES about having this done only to then have the vehicle towed to a transmission shop for rebuild/replace/repair. I am second owner on the vehicle and honestly I know I have never had the transmission fluid changed nor flushed (please dont start throwing shoes at me).
To make my worrying even worse, it has just recently started to tremble when I mash the gas at high speed to make a passing manouver. I saw an older post about checking the mounts but mine are all in great shape.
What do you guys think? Take it to a tranny shop and bend over OR take the plunge and get the flush done and roll the dice? I am going to Vegas in a few weeks....
Thanks!
Patrick
To make my worrying even worse, it has just recently started to tremble when I mash the gas at high speed to make a passing manouver. I saw an older post about checking the mounts but mine are all in great shape.
What do you guys think? Take it to a tranny shop and bend over OR take the plunge and get the flush done and roll the dice? I am going to Vegas in a few weeks....
Thanks!
Patrick
#4
Super Moderator
Professional Mechanic
Professional Mechanic
It is OK to flush a trans with dark fluid. However when it smells burnt the it should NOT be touched unless you are prepared to buy a new trans. Are you sure that the tremble when mashing the gas is the trans and not a misfire. Most trans problems are not really like that but I find that most times I get a description like that it is a misfire.
#5
Thanks for the welcome Shark! And thanks to the rest who have responded so quickly. I am going to get a second opinion on the "burnt" question and go from there. Something I noticed is a slight backfire in the header. This happens only when I am rolling along at say 10 miles an hour down a merge ramp onto the highway and mash the gas to get up to highway speed. Could it be related???
#7
O2 sensors may need to be replaced? Are you throwing any codes or getting a CEL or SES light? When is the last time you did a tune up or major service?
Without knowing the previous service history on the truck, 182k+ is good life for a 4l60e.
Without knowing the previous service history on the truck, 182k+ is good life for a 4l60e.
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#8
bai78, that is a great looking Tahoe man. Thanks for trying to help me out on this. The O2 sensors, I am positive need to be replaced. My check engine light has come on in the past and I went to a local auto store and had them check and clear it. It was during the check that I discovered the O2's need replacing. Gotta save some money for them though. Last I checked they were around $100 each and if memory serves me correctly there are four?
On the tranny, I checked the fluid myself and it is red, to clear red, doesnt look "burnt". now i checked it when it was cool/warm and not at operating temp. Should I check it at operating temp? I also compared the smell on the dipstick to the smell from a brand new bottle of Trans fluid. Didnt seem much difference to me.
I put a tune up on it at 100k miles but probably need to do another one.
This has really been a great truck. I have owned it since 60k miles and the only thing I have replaced on it is a battery, serp belt, and an alternator. I wouldnt trade it for the world.
On the tranny, I checked the fluid myself and it is red, to clear red, doesnt look "burnt". now i checked it when it was cool/warm and not at operating temp. Should I check it at operating temp? I also compared the smell on the dipstick to the smell from a brand new bottle of Trans fluid. Didnt seem much difference to me.
I put a tune up on it at 100k miles but probably need to do another one.
This has really been a great truck. I have owned it since 60k miles and the only thing I have replaced on it is a battery, serp belt, and an alternator. I wouldnt trade it for the world.
#9
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I think a tune up would help. Mine '98 has 195xxx miles and I think the tranny is starting to shudder. It used to have a "buck" in it going down the road at 70, tune up cleared that up. Next is a trans. flush and then hope for the best. If the tranny smokes, I'll probably get used one and stuff in 'er.
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