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#1 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Here we go again...Trans fluid dumping.
I have th400 and had a leak a while back where the fluid would dump after a drive which I tracked down to a small hole on top of my trans, but it did not happen all the time...so not knowing what I was doing I filled the small hole with bondo then posted on the board about it,(pics here)
http://67-72chevytrucks.com/vboard/s...d.php?t=296816 and found out that I should not have filled that hole as preasure would build up in the tranny. Also that there should be a small metal breather tube comming from the tranny where the hole is but it has been removed or broken off over time, anyway after unpicking the bondo no further probs until now. It has dumped big time through the dipstick sprayed the dizzy, fire wall and poured all over the exhaust...scared it was gona catch fire on the way home, smoke everywhere......so is it preasure related? and why would preasure build up? is it overheating? the fluid was vey hot when it was coming out, why would it overheat? have not been able to use my truck all week as soon as I drive a few hundred yards I can see the smoke trail behind me and the gears are not shifting smoothly now, there is little or no fluid left in there now. I guess my main question is....can I find and fix the prob myself? (with the help of you guys) or is this a job for the pro's??
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#2 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,737
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Re: Here we go again...Trans fluid dumping.
Hi, how are ya? First thing i would do is find out where it is coming out of. It sounds like it isn't breathing correctly. Hence the "breather" tube on top of the case. Make sure it is clear. A trans cooler will help with the temps some. As far as not shifting properly, it is probably low on fluid. Let us know what you find out. Eric
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#3 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Hey Eric, definately dumping through the dipstick this tiime, but previously from that breather I suppose it could still be blocked from the bondo as I did really trowel it in there. But even so if I never had blocked it up it did dump from that hole before, so something is going on in there to make it spew fluid from any exit point it can find. I've missed driving my truck this week Eric have to walk past it on the drive and get into my **** box 95 BMW to go to work.
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#4 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,737
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Re: Here we go again...Trans fluid dumping.
Is it coming out the top of the dipstick tube? or where the tube goes in by the pan? Dumb thought, but i had a hurst converter in my car that had a crack in it and that threw fluid everywhere. Also, if the front seal goes out that will dump alot of fluid that will get sprayed everywhere. Do you have steel lines going to the radiator?
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#5 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
|
Re: Here we go again...Trans fluid dumping.
Definately at the top of the tube as the dipstick was pushed out by the force and it had sprayed the top of the firewall and the dizzy in fluid I was sort of glad it was easy to find where it had come from as tracking these leaks down after they have covered everything in fluid can be hard. And yes to the steel cooling lines to the rad, do ya think I would be able to drop the tranny out myself?
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#6 |
Registered User
Join Date: Mar 2005
Location: waco tx
Posts: 584
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Re: Here we go again...Trans fluid dumping.
I had a 75 grand prix that blew fluid out the dipstick.It turned out that the trans cooler in the radiador had a hole in it and letting water mix with the fluid .
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77 swb starting all over again. |
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#7 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,271
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Re: Here we go again...Trans fluid dumping.
8B. If that is the case here you better be checking the trans fluid level to be sure it is not going up indicating coolant in the trans fluid. That water will steam the material right off the clutches in short order and you will be looking at a rebuild. Radiator coolant level drops and trans fluid level rises...that's bad.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#8 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Thanks for the suggestions guys. But just to update on this I got home from work early and decided to get the truck up on a couple of wheel ramps with a mind to removing the tranny myself and giving it a little overhaul in the evenings and weekends. So I put the ramps in place started her up dropped it into gear and...Nothing, not even the slightest bite from any of the gears, so something has gone badly wrong in there. Well I think I'll leave this one to the experts, I'm bowing out, found a guy that rebuilds these here in the UK and he has an Ebay store as well.
http://www.aldersautomotive.co.uk/
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#9 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Here we go again...Trans fluid dumping.
Does the tranny have enough fluid in it?
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#10 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Pretty much empty, it dumped about 3 times last week when it was still being used, really hope I haven't buggered something up driving it home.
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#11 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Here we go again...Trans fluid dumping.
That's why it won't move. Put some fluid in it. Check the level with the engine running, after putting it into all the gears.
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Beat it to fit, Paint it to match... ![]() |
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#12 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,737
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Re: Here we go again...Trans fluid dumping.
Add some fluid for sure if you are trying to move it. Even if you are down 2 quarts, that will be enough to make it not move.
I am still guessing the breather is plugged and that is where your problems are starting. If you add fluid, make sure you add the same as what is in there already. I run type F or FA in any new ones. Yours may be dexron. Keep us posted. Eric
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#13 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
|
Re: Here we go again...Trans fluid dumping.
Way to go!!! thanks sinister & Eric you clever 67-72 truck owning dudes.
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__________________
Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#14 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Here we go again...Trans fluid dumping.
Glad it worked out for you.
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#15 |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Well since my last post I removed the Transmission and left it in for a freshen up, the guy said that "he found no real probs with it", he just tightened up the clutches all new seals and added a new breather tube that was missing from the housing.
So it went from this... ![]() To this.... ![]() So the reason for my Trans fluid overheating & dumping passed to the Converter which was a TCI Sizzler 1700 stall, he did some checking and said that as it was quite old and was never really up to the job being mated to a 454 with a mild cam, he reckoned this was the prime suspect. So I replaced it with a B&M Holeshot 2400 stall, added new Mini Starter, Flex Plate & Trans mount for good measure. ![]() So far so good, no overheating fluid dumping issues. If it starts to show signs of this happening again i'll go for the added external Trans fluid cooler.
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Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#16 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,515
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Re: Here we go again...Trans fluid dumping.
-
Glad you got it sorted. I think it will drive like a new truck now.... ![]() LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#17 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: Here we go again...Trans fluid dumping.
I think you should still ad an external tranny cooler and play it safe...I have always added one to all my trucks..
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#18 | |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Quote:
Thanks Leon..
__________________
Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#19 |
Senior Member
![]() ![]() Join Date: Dec 1999
Location: Urbana,Ohio,USA
Posts: 4,618
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Re: Here we go again...Trans fluid dumping.
I had this happen once. Turbo 400 also. Called my tranny guy. He said it was the front pump that was bad.
Took it out, had him rebuild it. Never any problems after that.
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2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6 |
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#20 |
Restoration Virgin!
Join Date: Jan 2008
Location: Huntersville, NC
Posts: 8,298
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Re: Here we go again...Trans fluid dumping.
Nigel...glad everything is okay!!!
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Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present |
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#21 |
Registered User
Join Date: Oct 2008
Location: Brighton, TN
Posts: 1,267
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Re: Here we go again...Trans fluid dumping.
Glad everything worked out for ya. I know its pretty easy over here to find people who rebuild trannys and stuff I would have no idea where to start over there. I would imagine most people would say "You have a what?"
Only takes a few min to install an external cooler. If you running a stall its a good idea regardless. What I usually do is unhook the bottom line to the radiator connect a hose to it going to the external cooler then connect the other side of the cooler to the radiator. This way you have two coolers essentially. Beat of luck.
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A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together. |
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#22 | ||
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Quote:
Cheers Geoff! It's just great having my Truck back on the road again... Quote:
Thanks monte.
__________________
Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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#23 |
Registered User
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,136
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Re: Here we go again...Trans fluid dumping.
Hmmmmm "tightened the clutches"????? Sounds suspicious to me. I've rebuilt a TH350 but not a TH400. But, I'm pretty sure that's not possible.
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#24 | |
454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: Here we go again...Trans fluid dumping.
Quote:
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__________________
Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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