Tranny fluid leaking THRU the slip joint??? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-18-2007, 05:31 PM
murrsue's Avatar
Member
 

Last journal entry: 57 pickup 8.8 rear axle install
Last photo:
Join Date: Dec 2002
Location: Manitoba, Canada
Age: 55
Posts: 211
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Tranny fluid leaking THRU the slip joint???

My project vehicle has a 700r4. When the driveshaft was made up the first shop didn't do a very good job welding one end. The second shop fixed it but the total length ended up 1/2" shorter than what I initially wanted. The slip sleeve will go in 4 1/2" if slid in all the way. Once installed it's pulled back 3" to bolt it at the rear, leaving 1 1/2" engaged. Is this too little engagement??

Second problem. I noticed a puddle of tranny fluid below it today. It appears to be dripping from the front u-joint. The rear seal area appears to be dry. Is it possible for it to be leaking down the centre of the slip yoke?? When I unbolted it at the rear and shoved it into the tranny, fluid gushed out at the u-joint. The yoke supposedly came from an Astro van that was equipped with a 700r4.

    Advertisement
__________________
murray
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-18-2007, 05:47 PM
steve t's Avatar
ex biker, now hotrodder
 
Join Date: Mar 2005
Location: NC
Age: 64
Posts: 863
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
a 1 1/2 dont seam like much, but i no expert, u can j b weld pinholes in slip joint to stop leak
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-18-2007, 06:20 PM
Registered User
 
Last photo:
Join Date: Sep 2006
Location: East Lyme, Ct.
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The shop that built my drive shaft built it with 3/4" clearance. Concerning the leakage from the front U joint, if the transmission was being filled for the first time and all the fluid was put in before the engine was started it will leak out as you described (this happened to me). For a TH350, TCI recommends adding 4 quarts initially then topping off after engine is started.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-18-2007, 06:21 PM
murrsue's Avatar
Member
 

Last journal entry: 57 pickup 8.8 rear axle install
Last photo:
Join Date: Dec 2002
Location: Manitoba, Canada
Age: 55
Posts: 211
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Something else I just noticed. Not running the tranny fluid is over full and I think it looks a bit pinkish? Could it have antifreeze in it? Is my custom made rad from the local rad shop leaking into the cooling lines??
__________________
murray
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-18-2007, 07:11 PM
Member
 
Join Date: Aug 2003
Location: California
Posts: 903
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
murrsue,

I think there is an "O" ring that goes in the slip joint so the fluid does not leak out of the end of the yoke.

As for your question about the coolant getting into the transmission I would have to say no. The fluid pressures in the transmission are much higher than in the cooling system. So if your engine was overheating and leaking coolant out you would see the "scum" foaming out of your overflow tank.

Scholman
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-18-2007, 07:56 PM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,064
Wiki Edits: 1659

Thanks: 317
Thanked 97 Times in 94 Posts
Quote:
Originally Posted by murrsue
My project vehicle has a 700r4. When the driveshaft was made up the first shop didn't do a very good job welding one end. The second shop fixed it but the total length ended up 1/2" shorter than what I initially wanted. The slip sleeve will go in 4 1/2" if slid in all the way. Once installed it's pulled back 3" to bolt it at the rear, leaving 1 1/2" engaged. Is this too little engagement??

Second problem. I noticed a puddle of tranny fluid below it today. It appears to be dripping from the front u-joint. The rear seal area appears to be dry. Is it possible for it to be leaking down the centre of the slip yoke?? When I unbolted it at the rear and shoved it into the tranny, fluid gushed out at the u-joint. The yoke supposedly came from an Astro van that was equipped with a 700r4.

many ( not all) 700/4L60 trannys have a sealing sleeve with an O-ring in them . The yoke on the drive shaft will have a small hole in the center plug at the end of the yoke splines.

in the photo there is a sleeve on the out put shaft of the trans for the yoke.



__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-18-2007, 08:01 PM
Registered User
 
Join Date: Jan 2005
Location: Brookfield, WI
Age: 53
Posts: 499
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
1 1/2" slip is OK. The leak is probably due to a vent hole drilled in the welch plug in the slip yoke. This hole is there for late style trans with a sealed slip yoke "can". There are two waysto fix this. Install the yoke seal apparatus on the output shaft or weld the hole shut. Do not use silicone in th eyoke tube.
You CAN get coolant into transmission fluids thru the radiator cooler. If the fluid looks like strawberry milkshake, that is bad. One ounce of water in a trans will degrade the clutch bonding and the trans will fail. This is not a good scenario and there is no flushing that will cure the problem, only rebuild. This is not an uncommon problem in the trans repair field....
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-18-2007, 08:03 PM
Registered User
 
Join Date: Jan 2005
Location: Brookfield, WI
Age: 53
Posts: 499
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Crosley's picture is perfect. The sleeve is readily available at trans shops. Check the fluid condition first, as I stated before.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-18-2007, 08:24 PM
grandpaws 57's Avatar
"Don't need no V/8"-grandpaw
 
Join Date: Aug 2006
Location: Dufur or
Posts: 257
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
coolant in trans

I agree that you can bleed rad. coolant into trans.One possible way is when you shut off motor presure in trans goes away,but coolant presure stays up for a while.Also,I would want more slip area on yoke,may be OK tho.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-19-2007, 12:29 PM
Registered User
 
Join Date: Oct 2006
Location: VIRGINIA
Posts: 690
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Tranny fluid leaking Thru the slip joint???

You can have fluid from the radiator leaking into the trans,yet still have no fluid from the trans leaking into the radiator, or vice versa.

This can happen because the surface tension is different between the two fluids.

Also chazmac is right, if this trans has water in it, it needs to come apart, before it comes apart.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-19-2007, 12:36 PM
Member
 
Join Date: Oct 2002
Location: The Lone Star State (Houston area)
Posts: 1,189
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Every driveshaft maker I've heard of says this about driveshaft engagemen to the transmission. Push yoke all the way in and retract it 1(one) inch. Measure for your new driveshaft at this point. Your yoke is probably wobbing with output shaft which is deforming the seal lip and allowing fluid to leak.
It is new driveshaft time, pal.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-19-2007, 06:17 PM
murrsue's Avatar
Member
 

Last journal entry: 57 pickup 8.8 rear axle install
Last photo:
Join Date: Dec 2002
Location: Manitoba, Canada
Age: 55
Posts: 211
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
best way to check for tranny cooler/rad leak

I need to check the tranny cooler portion of the rad to see if it's got a leak. I was thinking about plugging one side and putting low pressure air to the other side and watching the coolant for bubbles. Sound good?
__________________
murray
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-19-2007, 06:46 PM
grandpaws 57's Avatar
"Don't need no V/8"-grandpaw
 
Join Date: Aug 2006
Location: Dufur or
Posts: 257
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
trans cooler

Have worked in a rad shop,i've seen plenty cooler leaking.If your fluid look PINK AND FOAMY,you need a new cooler and poss. tear down of trans.I don't think your test will tell you more than just looking at fluid. real bummer tho!
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-20-2007, 12:51 PM
murrsue's Avatar
Member
 

Last journal entry: 57 pickup 8.8 rear axle install
Last photo:
Join Date: Dec 2002
Location: Manitoba, Canada
Age: 55
Posts: 211
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
pink tranny fluid

Well I drained the tranny and the fluid is a milky dark pink. I disconnected the tranny cooler lines at the rad and hooked up some air at 15psi and I got no bubbling in the rad coolant at all. I left the pressure on and put the cap on the rad for a couple of hours and no pressure built up inside the rad that I could tell.
Now I'm left to wonder how the moisture got in. The 700r4 was used but was supposed to have been rebuilt with about 35000 miles on it. When I drained it last winter to install new wiring inside for the torque lock I don't recall the tranny fluid looking funny. The tranny sat empty attached to the motor in the chassis for a year until this winter when I put the truck cab back on. After I got it wired and fired up the motor I filled the tranny, a couple of quarts at a time while running the gear indicator up and down a few times. It's only been backed in and out of the shop a few times and then last week I drove it to the end of the block and back, up to about 30mph to see if it was shifting okay. It sat for a week until I noticed fluid coming out of the welch plug in the slip yoke and tranny was over full and pink. I guess I'm in for a rebuild now. Maybe I should have the rad rechecked at the shop that built it.
__________________
murray
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-20-2007, 02:24 PM
Registered User
 
Join Date: Oct 2006
Location: VIRGINIA
Posts: 690
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Tranny fluid leaking Thru slip joint???

Better safe than sorry. Maybe the radiator shop may feel some culpability for the water damage to the trans. It won't hurt to ask. Good luck.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.
Email Address:

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Transmission fluid problems? Croz Transmission - Rearend 7 12-22-2006 01:37 AM
Grooved slip yoke chrias Transmission - Rearend 1 08-12-2004 11:25 AM
why does my tranny slip when i turn right? biscotrain Transmission - Rearend 6 07-30-2004 11:13 AM
Pre-muffler exaust joint...loose and leaking 78SilverShark Engine 12 10-11-2003 08:43 PM
ATF leaking right out of the slip yoke COCHEV Transmission - Rearend 4 11-24-2002 10:48 AM


All times are GMT -6. The time now is 12:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.