Home | Register | Login | Contact Us

 
Auto Math
Classifieds
Forum
Gallery
Games
Garage
Tech Articles
Utilites
 
FAQFAQ    SearchSearch    RegisterRegister    Log inLog in    Log in to check your private messagesLog in to check your private messages    Forum Subscriptions1/4 Mile Table 

th400 leaking

 
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Driveline / Suspension
View previous topic :: View next topic  
Author Message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Fri Jul 06, 2007 4:10 pm    Post subject: th400 leaking Reply with quote

i have a th400 that is puking fluid out of the dipstick,, i have checked the fluid level and it is ok.. the box has a manual valvebody and a trans brake.. does any one have any idea what might be causing this . its driving me mad, so far it has set the header on fire 3 times..
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3483
Location: Houston,Texas
347040.52 points


1969 Oldsmobile Cutlass

PostPosted: Fri Jul 06, 2007 4:16 pm    Post subject: Reply with quote

plugged vent, overheating, over filled.
_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

Back to top
View user's profile Send private message
Big Dave
Moderator


Joined: 04 Dec 2005
Posts: 2663
Location: Tampa Florida
120538.84 points



PostPosted: Fri Jul 06, 2007 4:56 pm    Post subject: Reply with quote

Torn O-ring on the filler tube?
Back to top
View user's profile Send private message
af2
Member


Joined: 01 Sep 2003
Posts: 5578
Location: grassvalley, ca
71864.50 points


1933 Willys Coupe

PostPosted: Fri Jul 06, 2007 4:59 pm    Post subject: Re: th400 leaking Reply with quote

zephyrc wrote:
i have a th400 that is puking fluid out of the dipstick,, i have checked the fluid level and it is ok.. the box has a manual valvebody and a trans brake.. does any one have any idea what might be causing this . its driving me mad, so far it has set the header on fire 3 times..


It sounds as if the vent has been plugged and under the brake the fluid has no where to go but out the dip stick.
Other members here run a catch can to the vent tube to stop that problem.
Back to top
View user's profile Send private message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Fri Jul 06, 2007 5:22 pm    Post subject: Reply with quote

thanks for your suggestions,, i will check the level in the morning.. i blew thru the vent to check it was not blocked,, i have a temp gauge in the pan and it never goes over 190 degrees.. this problem occurs at any temp.. i am beginning to doubt my dipstick.. how high should the fluid level be when hot etc,, should it be level with the top of the trans pan
Back to top
View user's profile Send private message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Fri Jul 06, 2007 5:24 pm    Post subject: Reply with quote

should the dipstick be sealed to the tube when in,,
Back to top
View user's profile Send private message
af2
Member


Joined: 01 Sep 2003
Posts: 5578
Location: grassvalley, ca
71864.50 points


1933 Willys Coupe

PostPosted: Fri Jul 06, 2007 5:29 pm    Post subject: Reply with quote

Are you sure the fluid is coming from the dip stick and not the vent? Being on the same side might give a false leak point.
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3483
Location: Houston,Texas
347040.52 points


1969 Oldsmobile Cutlass

PostPosted: Fri Jul 06, 2007 5:34 pm    Post subject: Reply with quote

zephyrc wrote:
how high should the fluid level be when hot etc,, should it be level with the top of the trans pan


with engine/trans at full operating temp, idling in park, you can remove the modulator valve (or plug) and the fluid should barely trickle out. if not its too low. obviously, if it gushes out its over filled. mark your dipstick accordingly.

_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

Back to top
View user's profile Send private message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Fri Jul 06, 2007 5:58 pm    Post subject: Reply with quote

until recently i had a catch can on the vent and was losing very little from there.. had a friend watch around the housing whilst i used the brake and it was coming out the dipstick tube and running down onto the header.. thats why i asked about the stick being sealed when down,, mine is not sealed, well not air tight... where is this modulator plug on the box.. thanks for your help guys
Back to top
View user's profile Send private message
af2
Member


Joined: 01 Sep 2003
Posts: 5578
Location: grassvalley, ca
71864.50 points


1933 Willys Coupe

PostPosted: Fri Jul 06, 2007 6:16 pm    Post subject: Reply with quote

zephyrc wrote:
until recently i had a catch can on the vent and was losing very little from there.. had a friend watch around the housing whilst i used the brake and it was coming out the dipstick tube and running down onto the header.. thats why i asked about the stick being sealed when down,, mine is not sealed, well not air tight... where is this modulator plug on the box.. thanks for your help guys


Modulator is where the brake solenoid is now.
I would use a late model dip stick that you can turn the top to seal it and see what happens. it should go out the vent into you're catch can.
Back to top
View user's profile Send private message
Knarley Darley
Member


Joined: 22 Apr 2004
Posts: 1247

540238.26 points



PostPosted: Fri Jul 06, 2007 11:26 pm    Post subject: Reply with quote

They do make a dip stick that seals tightly to the tube. Most late model GM trucks have them. I caught a customers 85 suburban on fire the same way once. The vent was plugged from mud womping and it puked out the dip stick tube onto the manifold and flamed on. I have a sealed one on my race car and a puke tank on the vent mounted in the trunk.
Back to top
View user's profile Send private message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Sun Jul 08, 2007 1:34 am    Post subject: Reply with quote

have ordered a new dipstick,, could not find a locking one over here but have ordered a lokar unit that has good sealing at the top...can i remove the trans brake solenoid with the engine running or will something bad happen to the box.. thanks for your help, i have had this prob for a long time now and have set fire to the car several times,, it normally catches fire at the end of the strip, safety marshals are always there to help ...
Back to top
View user's profile Send private message
zephyrc
Newbie


Joined: 06 Jul 2007
Posts: 6

305.86 points



PostPosted: Sun Aug 12, 2007 4:10 pm    Post subject: Reply with quote

fitted new lokar dipstick and problem went away for a while.. drove the car today and the entire front corner of the box is soaked with trans fluid, it caught light in the gas station but was put out,, dipstick is bone dry. could a blocked cooler do this... i am using an engine oil cooler as my trans cooler, is this ok, it is mounted on the inner wing in the upright position.. i am going to pull the cooler and lines tomorrow to check for blockage and leaks, , george
Back to top
View user's profile Send private message
Knarley Darley
Member


Joined: 22 Apr 2004
Posts: 1247

540238.26 points



PostPosted: Sun Aug 12, 2007 4:58 pm    Post subject: Reply with quote

The thing I dont like with the lokar is no bracket to hold it in, just the "o" rings. So if the trans is somehow building pressure (not venting) it may have blown the lokar tube up enough to unseat the O rings and leak. With the stock metal tube bolted to the bell housing, and a late model dipstick with the leaver that folds over to seal and lock it in, there is no way for that set up to leak.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Driveline / Suspension All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
Home | Contact Us | Automath | Cam Files | Dyno Search | Forum | Garage | Picture Gallery | Reaction Timer

Copyright 1997-2018 SMOKEmUP.com All rights reserved.
Advertising Info     Disclaimer     Privacy Policy