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#1 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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th350 help ASAP
Well the last couple days have noticed that 1-2 shift does not fully engage like it use to in my th350, seems to just roll through 2nd gear. No flare up or quick spike in RPM's, an 2-3 is same as usual, an its not getting worse. Installed a new vacuum modulator, with very minimal difference, this is my DD during the winter, I need help FAST, any experiences good bad or ugly would help, thanks guys
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Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed Last edited by mainermikeyd; 01-06-2010 at 09:47 PM. |
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#2 |
Gettin It One Pice At A Time
Join Date: Oct 2004
Location: everett, washington
Posts: 2,688
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Re: th350 help ASAP
I assume you checked the fluids when it was hot??
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RIP ELJAY ![]() ![]() Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby |
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#3 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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Re: th350 help ASAP
checked all fluids, added Lucas tranny treatment all seem fine, no burnt smell, nice red color to fluid, whats next??
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Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed |
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#4 |
Gettin It One Pice At A Time
Join Date: Oct 2004
Location: everett, washington
Posts: 2,688
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Re: th350 help ASAP
how does it shift manually?
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RIP ELJAY ![]() ![]() Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby |
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#5 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,294
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Re: th350 help ASAP
how old is the filter in it?
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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#6 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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Re: th350 help ASAP
shifts manually the same, an filter has never been changed since I bought it last year
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Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed Last edited by mainermikeyd; 01-06-2010 at 09:48 PM. |
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#7 |
Gettin It One Pice At A Time
Join Date: Oct 2004
Location: everett, washington
Posts: 2,688
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Re: th350 help ASAP
I could be worth it to change the filter, though, no guarantee that it will fix the problem. Double check your vacuum lines. other then that, my "GUESS" is that the trans could be on the way out. maybe try having this moved to the E&D section....
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RIP ELJAY ![]() ![]() Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby |
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#8 |
Registered User
Join Date: Jan 2009
Location: Kansas city
Posts: 756
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Re: th350 help ASAP
Sounds like the tranny is ready to become a single speed tranny lol.Mine did these 2-3 months ago and I finnly just replace the tranny. Its not that bad of a project I did it by myself out in my street.(couldn't get my own driveway dirty)
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#9 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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Re: th350 help ASAP
I got no problem doing it, got a shop got air, got lifts, but i dont wanna replace it if something can be fixed. guess the days of mechanics are long gone all anyone does anymore is just change parts or say rebuild it, this post is just a further extension of that, not everyone can afford $650 for a professionally rebuilt performance tranny!!!!!!
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Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed |
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#10 | |
Registered User
Join Date: Jan 2009
Location: Kansas city
Posts: 756
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Re: th350 help ASAP
Quote:
If you want to invest a couple dollars on a boost/vacume gague I would go for it plumb it in and its a good addition to help tune the truck. I don't reget it at all. Sorry but a bad tranny is usually fixed by a rebuild because you might as well when your in there or just a total tranny swap. I feel ya on the tight budget I'm a young kid with a low wage job spending 100$ on a tranny at a salvage yard really tore into my pockets. And chances are you don't need a $1,000 hi-po tranny you just needa oem replacement for your needs.
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#12 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: th350 help ASAP
its doubtful theres anything that can be "fixed" you dont just crack open an auto trans and replace one thing. its stupid to not rebuild it if you have to open it up. theres almost nothing that is serviceable on a th350. modulator governor and valve body is it. but the symptoms you describe sound internal and sound like a trans thats going out. rolling into second gear could be the band starting the burn up. repacing 1 thing inside an auto trans without just getting a kit and rebuilding would be like replacing rings on 1 piston in an engine and ignoring everything else. its just not smart.
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#13 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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Re: th350 help ASAP
thanks cableguy, first post that gives me a little direction!! guess it sounds like it is terminal just gonna try an blow the **** out of it on the way to work tomorrow morning, i got no problem blowing the ****in POS up or rebuilding it just hate putting money into this tranny now, couldnt have happened in the middle of the summer when i didnt need it.
__________________
Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed |
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#14 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: th350 help ASAP
Things never happen at a good time. the only non terminal possibility is trash in the valve body. the odd part is the fluid being really clean. i would still suspect a slipping band the bad part is you cant tell till you open it up. theres no external band adjustment. a bad lip seal will cause the same thing because it will bleed off fluid pressure and take a tad longer to fill the drum and basically that would be call for a rebuild because if one seal is bad the rest arent far behind and theres no sense in tearing it apart without rebuilding it. a rebuild kit for a th350 is too cheap
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#15 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: th350 help ASAP
also the one other thing to check before condemning the tranny. make sure the kick down cable isnt broken or detatched.
__________________
Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#16 |
Registered User
![]() Join Date: Sep 2008
Location: Limington, ME
Posts: 290
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Re: th350 help ASAP
Thanks for the help guys short of rippin everything apart, tried pretty much everything already mentioned seems like she is a gonner, 1st is startin to have issues now too so during some local looking found same tranny TC combo rebuilt less 2 years out of truck that got T-boned this fall. Question is the guy emptied not all but most of the tranny fluid out of the tranny during storage, been in a heated garage for less than 4 months, do I have anything to worry bout with this??
__________________
Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed |
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#17 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: th350 help ASAP
should be fine. I doubt there will be an issue. The only thing i dont like is buying a trans without being able to see the fluid because the fluid will usually tell the story.there should still be fluid in the TC so pull it off and pour a little out to see if its bright red check for metal etc. also unbolt the pan and look for a excessive trash. theres always going to be a little bit of material from normal wear but you will know if theres a ton in there.
__________________
Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#18 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,294
|
Re: th350 help ASAP
like cableguy said drop the pan thats worth a million words
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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