Transmission woes
#1
12-11-2007, 10:57 PM
Transmission woes
Hello,
I just got a 86 S10 Blazer 4x4 with the 2.8, automatic.
The blazer is in tip top shape with 108k miles.
In testing the transmission fluid, I detected a slight
burnt smell. So, I take it in and have the fluid and filter
changed w/trans additive. When I left, I was in an area
that I really couldn't get up a bunch of speed, but I noticed
the transmission was not shifting. It was staying in first.
Once I was able to get up speed, I revved it up enough that it did shift
but it took a high RPM. Any idea why this may of happened?
It still wants to stay in first all the time, and only a high RPM
will make it shift. The oil change store closed when I left,
so was not able to return for them to check it. Oh, and yes
I did check to see if it was full, and it was.
The transmission was working O.K. before the trans. fluid & filter change.
Thanks!
I just got a 86 S10 Blazer 4x4 with the 2.8, automatic.
The blazer is in tip top shape with 108k miles.
In testing the transmission fluid, I detected a slight
burnt smell. So, I take it in and have the fluid and filter
changed w/trans additive. When I left, I was in an area
that I really couldn't get up a bunch of speed, but I noticed
the transmission was not shifting. It was staying in first.
Once I was able to get up speed, I revved it up enough that it did shift
but it took a high RPM. Any idea why this may of happened?
It still wants to stay in first all the time, and only a high RPM
will make it shift. The oil change store closed when I left,
so was not able to return for them to check it. Oh, and yes
I did check to see if it was full, and it was.
The transmission was working O.K. before the trans. fluid & filter change.
Thanks!
#2
12-11-2007, 11:27 PM
RE: Transmission woes
Well, your best bet is to take it back as soon as you can and tell them exactly what it's doing now and that it wasn't doing it before. If they are any good at all they will fix it up for you as quickly as possible at no charge and tell you that they're sorry.
They must have left something disconnected by accident.
They must have left something disconnected by accident.
#4
12-12-2007, 07:26 PM
RE: Transmission woes
Thanks guys. I took it back today and the manager thought it was a bit low on fluid, so he added some and test drove.
Well, it did shift better, however, it is still shifting hard and it will not shift into overdrive.
These people use to be good, but I think its gone downhill. I think I'm going to have to eat
the charge and take the truck in to a tranny specialist.
As I don't know that much about these trannys, do you think this is something these guys did
to cause it or was it just going to happen with a new filter/oil?
Well, it did shift better, however, it is still shifting hard and it will not shift into overdrive.
These people use to be good, but I think its gone downhill. I think I'm going to have to eat
the charge and take the truck in to a tranny specialist.
As I don't know that much about these trannys, do you think this is something these guys did
to cause it or was it just going to happen with a new filter/oil?
#5
12-12-2007, 09:15 PM
RE: Transmission woes
Tough call.
Depends on how the tranny was maintained.
Tranny fluid by nature is full of detergents. When you do a flush you remove all the old debris keeping the seals/gaskets from leaking. If you do regular maintenance the debris never gets to build up. Teh reasons seals/gaslets leak is due to excessive heat and lack of lubricants in the tranny fluid.
Doing hte flush could be the reason.
In your case it sounds like your governor is sticking. Its inside the round hump on the drivers side. If this is a 4x4 you will have to remove the t-case shift linkage in order to get the governor out.
now there is another possibility, if the shop dropped the tranny pan, they could have knocked some debris loose or got some in the case when they had it open. It only takes a piece of grit the size of a grian of salt to stick a valve. There is one other thing thye could have done, and if they used any gasket maker on teh pan when they put it back together, they could have plugged a drain hole. With that hole plugged you will fry your tranny. I belive it drians the torque converter.
One more thing, the 700R4 is the most popular auto tranny on the market and any decent tranny shoip will hav had their fiar share of them. When they rebuild it, tell them your uses and tell them you want it to shift firm, like a rear tranny should. Then post up what they recommend.
Depends on how the tranny was maintained.
Tranny fluid by nature is full of detergents. When you do a flush you remove all the old debris keeping the seals/gaskets from leaking. If you do regular maintenance the debris never gets to build up. Teh reasons seals/gaslets leak is due to excessive heat and lack of lubricants in the tranny fluid.
Doing hte flush could be the reason.
In your case it sounds like your governor is sticking. Its inside the round hump on the drivers side. If this is a 4x4 you will have to remove the t-case shift linkage in order to get the governor out.
now there is another possibility, if the shop dropped the tranny pan, they could have knocked some debris loose or got some in the case when they had it open. It only takes a piece of grit the size of a grian of salt to stick a valve. There is one other thing thye could have done, and if they used any gasket maker on teh pan when they put it back together, they could have plugged a drain hole. With that hole plugged you will fry your tranny. I belive it drians the torque converter.
One more thing, the 700R4 is the most popular auto tranny on the market and any decent tranny shoip will hav had their fiar share of them. When they rebuild it, tell them your uses and tell them you want it to shift firm, like a rear tranny should. Then post up what they recommend.
#6
12-13-2007, 08:31 PM
RE: Transmission woes
ORIGINAL: Hanr3
Tough call.
Depends on how the tranny was maintained.
Tranny fluid by nature is full of detergents. When you do a flush you remove all the old debris keeping the seals/gaskets from leaking. If you do regular maintenance the debris never gets to build up. Teh reasons seals/gaslets leak is due to excessive heat and lack of lubricants in the tranny fluid.
Doing hte flush could be the reason.
In your case it sounds like your governor is sticking. Its inside the round hump on the drivers side. If this is a 4x4 you will have to remove the t-case shift linkage in order to get the governor out.
now there is another possibility, if the shop dropped the tranny pan, they could have knocked some debris loose or got some in the case when they had it open. It only takes a piece of grit the size of a grian of salt to stick a valve. There is one other thing thye could have done, and if they used any gasket maker on teh pan when they put it back together, they could have plugged a drain hole. With that hole plugged you will fry your tranny. I belive it drians the torque converter.
One more thing, the 700R4 is the most popular auto tranny on the market and any decent tranny shoip will hav had their fiar share of them. When they rebuild it, tell them your uses and tell them you want it to shift firm, like a rear tranny should. Then post up what they recommend.
Tough call.
Depends on how the tranny was maintained.
Tranny fluid by nature is full of detergents. When you do a flush you remove all the old debris keeping the seals/gaskets from leaking. If you do regular maintenance the debris never gets to build up. Teh reasons seals/gaslets leak is due to excessive heat and lack of lubricants in the tranny fluid.
Doing hte flush could be the reason.
In your case it sounds like your governor is sticking. Its inside the round hump on the drivers side. If this is a 4x4 you will have to remove the t-case shift linkage in order to get the governor out.
now there is another possibility, if the shop dropped the tranny pan, they could have knocked some debris loose or got some in the case when they had it open. It only takes a piece of grit the size of a grian of salt to stick a valve. There is one other thing thye could have done, and if they used any gasket maker on teh pan when they put it back together, they could have plugged a drain hole. With that hole plugged you will fry your tranny. I belive it drians the torque converter.
One more thing, the 700R4 is the most popular auto tranny on the market and any decent tranny shoip will hav had their fiar share of them. When they rebuild it, tell them your uses and tell them you want it to shift firm, like a rear tranny should. Then post up what they recommend.
Thanks. I bite the bullet and took it in to a well respected tranny shop. They took the time to check it out in detail and
explain to me my options. After dropping the pan a couple days of driving after the fluid and filter was changed
there was a fair amount of shavings and clutch particals in the new fluid. He seemed to think that cleaning the valves
would work O.K. for now, but with the amount of sediment in the new fluid, he said it would be a guessing game to
how long it would start acting up again. So, I'm just going to have them rebuild it and that will take care of it for a long
time (in which I intend to keep). Oh I mentioned to him what you said (about the firm shift) and he very much agreed, but he said I didn't
want too much (like the corvette) as it would be uncomfortable.
#7
12-14-2007, 07:27 AM
RE: Transmission woes
It's good that you have taken it into a shop. I would see if you can get them to write you out a quote too. Who knows you might be able to get the shop that did the tranny fluid change to pay for some of it. It is a long shot, but who knows.
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