Transmission dumping fluid - Ford Bronco Forum
 1Likes
  • 1 Post By miesk5
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 05-18-2017, 11:25 PM Thread Starter
Registered User
 
Join Date: May 2017
Posts: 5
Bronco Info: 1992 Bronco 5.0l, E40D, Electric Shift transfer, stock automatic locking hubs. bone stock.
iTrader: (0)
Transmission dumping fluid

Transmission started leaking fluid like a garden hose the other day, wanted to get thoughts and tips? first pic is the plate covering the fly wheel, it appears to have a 1-2mm gap on the bottom just to confirm, that isn't normal right? should I pull the transmission or try and bang that gap shut?
Ssisson is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 05-19-2017, 09:10 AM
Registered User
 
Join Date: May 2014
Location: Alabama
Posts: 407
Bronco Info: 78 351/NP435, lifted 4", 33s. 79 in progress, built 400, low gear C6, lots more to come.
iTrader: (0)
There's no problem there and that gap is almost certainly unrelated to your leak.
the Son is offline  
post #3 of 5 (permalink) Old 05-19-2017, 09:44 AM
Moderator
 
miesk5's Avatar
 
Join Date: Oct 2003
Location: NJ
Posts: 17,560
Bronco Info: 96 Bronco XL 5.0 E4OD, Man Xfer/Hubs
iTrader: (2)
Garage
Yo Ssisson.
1992 Bronco 5.0 correct? Fill out your Bronco Info with year, engine size, transmission type, transfer case type (manual or electric shift), locking hub type (automatic or manual) info & major mods such as a Lift, etc. for better responses.
Click User CP
Edit Your Details,
Scroll down to Bronco Info

Quick guess, leak is due to deteriorated front pump seal, and the converter seal.
Following by Ford;
"If leak is not extreme to the point that you can't do the following, stop; top off E4OD Fluid.
Start and run the engine until the transmission reaches its normal operating temperature. Observe the back of the block and top of the converter housing for evidence of fluid leakage. Raise the vehicle on a hoist and position suitable safety stands under vehicle. Run the engine at fast idle, then at engine idle, occasionally shifting to the drive and reverse ranges to increase pressure within the transmission. Observe the front of the flywheel, back of the block (in as far as possible), and inside the converter housing and front of the transmission case. Run the engine until fluid leakage is evident and the probable source of leakage can be determined.
See this for the diagram for the seal locations, etc.

Item Part Number Description
1 7902 Converter Assembly
2 87650-S2 Converter Drain Plug
3 7L323 Front Pump Support Seal
4 7A248 Front Pump Seal Assembly
5 7D441 Front Pump Square Cut O.D. Seal

6 N805260-S Bolt and Washer Assembly
7 7G379 Washer
8 7A136 Pump Gasket
9 7A020 Fluid Level Indicator
10 7A228 Fluid Filler Tube Assembly
11 391308-S Filler Tube O-Ring
12 7N463 Short Fluid Inlet Tube Assembly
13 7005 Case
14 7034 Vent Assembly
15 7D273 Fluid Tube Inlet Connector
16 7D174 Converter Drain Back Check Valve Assembly Rear
17 7086 Extension Housing Gasket
18 7A039 Extension Housing (4x2)
19 7052 Extension Housing Seal
20 7A039 Extension Housing (4x4)
21 7H183 Extension Housing Plug
22 7B498 Manual Control Lever Oil Seal
23 7G391 Solenoid Valve Body Assembly
24 7A191 Transmission Pan Gasket
25 7A194 Transmission Pan (4x2)

In diagnosing and correcting fluid leaks in the torque converter (7902) area, use the following procedures to locate the exact cause of the leakage. Leakage at the front of the transmission as evidenced by fluid around the converter housing, may have several sources. By careful observation it is possible, in many instances, to pinpoint the source of the leak before removing the transmission from the vehicle. The paths that the fluid can take to reach the bottom of the converter housing are as shown in the following illustration. The following five steps correspond with the numbers in the illustration.

Torque Converter Area Leak Points

Fluid leaking by the torque converter impeller hub seal lip will tend to move along the converter impeller hub and onto the back of the impeller housing. Except in the case of a total seal failure, fluid leakage by the lip of the seal will be deposited on the inside of the converter housing only, near the outside diameter of the converter housing.
Fluid leakage by the outside diameter of the converter hub seal and the case will follow the same path which the leaks by the inside diameter of the seal follow.
Fluid leakage from the torque converter to the flywheel stud weld, drain plug, or seal weld will appear at the outer diameter of the torque converter on the back face of the flywheel (6375), and in the converter housing only near theflywheel. If a converter leak is suspected, remove torque converter and pressure check. Refer to Torque Converter Checks under Disassembly/Reassembly of Subassemblies in the Disassembly portion of this section.
Fluid leakage from the pump will flow down the back of the converter housing
Leakage may be from loose or missing pump bolts, torn or damaged pump-to-case gasket and/or a worn pump bushing.
Engine oil leaks are sometimes improperly diagnosed as transmission pump seal leaks. The following areas of possible leakage should also be checked to determine if engine oil leakage is causing the problem.
Leakage at the valve cover may allow engine oil to flow over the converter housing or seep down between the converter housing and block causing oil to be present in or at the bottom of the converter housing.
Oil plug leaks will allow oil to flow down the rear face of the block to the converter housing.
Leakage at the crankshaft seal will work back to the flywheel, and then into the converter housing.

Leak Check Test
The following procedures should be used to determine the cause of the leakage before service is made.
Remove the fluid level indicator (7A020) and note the color of the fluid. Original factory fill fluid is dyed red to aid in determining if leakage is from the engine or transmission. Unless a considerable amount of makeup fluid has been added or the fluid has been changed, the red color should assist in pinpointing the leak.
Remove the converter housing cover miesk5 Note, "this is that plate". Clean off any fluid from the top and bottom of the converter housing, front of the transmission case, and rear face of the engine and pan. Clean the converter area by washing with suitable nonflammable solvent, and blow dry with compressed air.
Wash out converter housing and the front of the flywheel. The converter housing may be washed out using clean solvent and a squirt-type oil can. Blow all washed areas dry with compressed air.
Start and run the engine until the transmission reaches its normal operating temperature. Observe the back of the block and top of the converter housing for evidence of fluid leakage. Raise the vehicle on a hoist and position suitable safety stands under vehicle. Run the engine at fast idle, then at engine idle, occasionally shifting to the drive and reverse ranges to increase pressure within the transmission. Observe the front of the flywheel, back of the block (in as far as possible), and inside the converter housing and front of the transmission case. Run the engine until fluid leakage is evident and the probable source of leakage can be determined.
When a converter drain plug leaks, remove drain plug. Install new drain plug. Tighten to 24-27 Nm (18-20 lb-ft).

Leak Check Test with Black Light
Oil soluble aniline or fluorescent dyes premixed at the rate of 2.5ml (1/2 teaspoon) of dye powder to 0.24L (0.5 pint) of automatic transmission fluid have proven helpful in locating the source of fluid leakage. Such dyes may be used to determine whether an engine fluid or transmission fluid leak is present, or if the fluid in the transmission fluid cooler hose leaks into the engine coolant system. An ultraviolet light must be used to detect the fluorescent dye solution."
the Son likes this.

See my partially recovered Bronco web site ...Will need to clean up dead links & add many more new links some day. Thanks to Mr. Schwim!
THANKS to ALL WHO SERVE!
miesk5 is online now  
 
post #4 of 5 (permalink) Old 05-20-2017, 01:27 AM
MARBLE GARGLER!
 
351w500's Avatar
 
Join Date: Dec 2007
Location: Fairfield ca.
Posts: 11,103
Bronco Info: '90 xlt 351w E40D Truetrac I GOT ROLLER ROCKERS !
iTrader: (4)
my trans used to leak a little but that stopped when I got an auxillary transmission cooler, seals like it when stuff aint too hot for them.

"I got roller rockers" DAMMIT!!
351w500 is offline  
post #5 of 5 (permalink) Old 05-20-2017, 07:19 AM
Registered User
 
Join Date: Mar 2017
Posts: 191
iTrader: (0)
Usually a heavy leak like that's almost always (almost.....but ya never know....so CHECK)

Okay... Usually that's a blown seal where the converter slides into the pump as already mentioned.

The good news! That seal is pretty cheap and usually simple to install.....

The bad news!...... Dropping the transmission is a PITA!.......

If you do the work yourself:

Check other places for leaks as mentioned. No sense in dropping it and then getting blind sided after it's installed.

Examine the converter where it slides into the pump. You want to see if there's a ridge or 'gouge' where the seal rides. If there's a a ridge or gouge- You might be able to get a "speedy sleeve" for it that will do the trick. Or you might need a new converter. I've gone down this road a few times with our old bronco II with an a4ld.

S-

1994 Ford Bronco XLT
5.8 Auto
Basket Case.
2001 VW Beetle
Daily Driver for now.
Tedybear is offline  
Reply

  Ford Bronco Forum > Bronco Discussions > Noobie Bronco Tech Questions. Flame free zone!

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Bronco Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. DO NOT USE Gmail.com accounts. If you only have a Gmail.com email please contact the administrator here

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome