How much transmission fluid drains with just pan drop - JeepForum.com
 5Likes
Reply
 
LinkBack Thread Tools
post #1 of 20 Old 08-14-2017, 09:28 AM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
How much transmission fluid drains with just pan drop

Hey all,
I'm getting ready to change the transmission filter which will require dropping the pan. I plan on replacing whatever transmission fluid that comes out with new transmission fluid. Specs (for stock 4.2L) say the transmission requires a total of 8 quarts, but I'm assuming not all 8 quarts will drain when just dropping the pan (even if I let it drain overnight). Am I mistaken? Does anyone know how much does drain so that I know how much to have on hand?
Thanks!

jeepwiseguy40 is offline  
Sponsored Links
Advertisement
 
post #2 of 20 Old 08-14-2017, 09:55 AM
Chrisnvegas
Web Wheeler
 
Chrisnvegas's Avatar
1992 YJ Wrangler 
 
Join Date: Dec 2012
Location: The Desert
Posts: 6,239
Between 3 and 4, so get 4 quarts.
ATF+4 is the replacement since ATF 3 isn't sold anymore.

It will drip for days also. So eventually about 5ish quarts will drip out but it takes a week.
The rest are in the TC.

While you have the pan down, consider installing a drain plug for next time.
Either weld a nut to the inside of the pan, or get the B&M universal drain plug kit.

The inside of the pan should also have a big magnet on it. Go ahead and clean it and put it back.

My Jeep is NOT a Fiat!
Chrisnvegas is offline  
post #3 of 20 Old 08-14-2017, 09:56 AM
vadslram
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2006
Location: VA Beach
Posts: 7,632
Garage
I don't remember exactly but I'm pretty sure it was less than 3 qts when I did mine. The TC is where most of the fluid is and as long as you work reasonably quickly that shouldn't drain down. I kept getting drip down from the cooler line and that was annoying.
vadslram is offline  
 
post #4 of 20 Old 08-14-2017, 10:01 AM
bpounds
Web Wheeler
 
bpounds's Avatar
1988 YJ Wrangler 
 
Join Date: Jun 2013
Location: Whittier
Posts: 1,971
http://www.jeepforum.com/forum/f12/h...today-3740633/ (Chris is too modest to link it himself)

I'm a fan of the, little-bit-each-week method. Especially on transmissions with a questionable history. There is never any shock to the system that sometimes happens with a full flush.

Bill
Dodge did not build my Jeep.
1988 Wrangler,4.2L I-6, Howell EFI JP-1,CRT HEI Ign,AX15 ext slave conversion, Zone 2.5" lift + 1/2" booms, BFG 31 x 10.5, Bestop.
bpounds is offline  
post #5 of 20 Old 08-14-2017, 10:04 AM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
Thanks guys. Drain plug sounds like a great idea. All I can find is "Dex/Merc" ATF, which they say is compatible with Dextron II, which is what my owners manual says it takes.
jeepwiseguy40 is offline  
post #6 of 20 Old 08-14-2017, 10:13 AM
Chrisnvegas
Web Wheeler
 
Chrisnvegas's Avatar
1992 YJ Wrangler 
 
Join Date: Dec 2012
Location: The Desert
Posts: 6,239
Quote:
Originally Posted by jeepwiseguy40 View Post
Thanks guys. Drain plug sounds like a great idea. All I can find is "Dex/Merc" ATF, which they say is compatible with Dextron II, which is what my owners manual says it takes.
ATF+4 is the Chrysler recommended replacement.
First it was ATFIII, then ATF+4
I got this info from Chrysler directly.

However, is an old style trans and probably not sensitive to different trans fluid.

I also agree with @bpounds
I've seen a trans self destruct when going from super dirty to clean fluid.

You will also fine the trans pan difficult to re-seal. I don't know why.

My Jeep is NOT a Fiat!
Chrisnvegas is offline  
post #7 of 20 Old 08-14-2017, 11:52 AM
bruinjeeper
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2013
Location: New West
Posts: 4,026
My tranny's lovin it...and so are my elbows and back from not having to crawl around under there scraping the floor to finagle the damn pan back on each time only to have it leak and drip and drip and redo and get tranny fluid down my arm and into my armpits. Gonna be a 20-30 minute job to do both the engine oil and tranny fluid every 4 months
Attached Thumbnails
20170525_175457_1502732437735.jpg   20170526_221937_1502733106155.jpg  

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
bruinjeeper is offline  
post #8 of 20 Old 08-14-2017, 12:14 PM
Chrisnvegas
Web Wheeler
 
Chrisnvegas's Avatar
1992 YJ Wrangler 
 
Join Date: Dec 2012
Location: The Desert
Posts: 6,239
Don't know why, but these pans are a pain to seal.
I even use an inch lb wrench.

Soon I'll reseal my kids pan... for the 3rd time. Very slight occasional drip.
I'm going to use Mopar sealant part #5010884ad
It's automatic transmission fluid resistant.

Never had so much trouble sealing pans before.
After a few tries, finally got mine sealed.
I'll never remove the pan again.

My Jeep is NOT a Fiat!
Chrisnvegas is offline  
post #9 of 20 Old 08-14-2017, 02:18 PM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
I'm going to try the mopar sealant - $12 on ebay. Entertaining guy on youtube who does a lot to his yj used loctite high flex form in place gasket maker. Said it's awesome but expensive - $24. Moses Ludel's write up says to never use anything except the gasket, but as others here have said, it's not easy getting it leak free.
jeepwiseguy40 is offline  
post #10 of 20 Old 08-14-2017, 03:10 PM
Chrisnvegas
Web Wheeler
 
Chrisnvegas's Avatar
1992 YJ Wrangler 
 
Join Date: Dec 2012
Location: The Desert
Posts: 6,239
Quote:
Originally Posted by jeepwiseguy40 View Post
I'm going to try the mopar sealant - $12 on ebay. Entertaining guy on youtube who does a lot to his yj used loctite high flex form in place gasket maker. Said it's awesome but expensive - $24. Moses Ludel's write up says to never use anything except the gasket, but as others here have said, it's not easy getting it leak free.
I didn't wanna use sealer.
I tried the cork gasket, rubber gasket, and the rubber coated metal gasket.
I still had a leak on my 92'
And this is using an inch pound torque wrench to spec.
I even bought a new OEM Mopar pan.

Drove me nuts!
Finally I used that expensive sealant (aerosol) let it dry for a week.
Like I said, I'll never pull the pan again.

I installed a 30,000 lb trans cooler and I suck out the fluid with vacuum from the dipstck every spring.
The fluid is spotless.

Right now, out of 4 YJ's in the garage, 3 of them drip from the pan.
One of them is a new rebuild where the rebuild shop installed the pan, and it leaks! The offered to send a new gasket.
Like I said, I'll reseal the other YJ's this fall when the Las Vegas heat dies down.

My Jeep is NOT a Fiat!
Chrisnvegas is offline  
post #11 of 20 Old 08-15-2017, 05:12 AM
bruinjeeper
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2013
Location: New West
Posts: 4,026
Lubelocker...

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
bruinjeeper is offline  
post #12 of 20 Old 08-17-2017, 04:31 PM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
Thanks for all the input. I'll give it a try. Won't be dropping the skid plate, so will be awkward working down there. The impetus for the filter/fluid change is that there's some hesitation going in reverse when I haven't driven it for a few day, and given that I think the filter hasn't been changed in 20yrs, but fluid seems to be a normal shade of red. Anyway, thanks again. I'll report back with anything of note.
jeepwiseguy40 is offline  
post #13 of 20 Old 08-17-2017, 05:26 PM
Chrisnvegas
Web Wheeler
 
Chrisnvegas's Avatar
1992 YJ Wrangler 
 
Join Date: Dec 2012
Location: The Desert
Posts: 6,239
Quote:
Originally Posted by jeepwiseguy40 View Post
Thanks for all the input. I'll give it a try. Won't be dropping the skid plate, so will be awkward working down there. The impetus for the filter/fluid change is that there's some hesitation going in reverse when I haven't driven it for a few day, and given that I think the filter hasn't been changed in 20yrs, but fluid seems to be a normal shade of red. Anyway, thanks again. I'll report back with anything of note.
I bet it hesitates going into drive too.
But you wouldn't know that because of the way you park.

Our transmissions are ancient.
The torque converters slowly drain while parked.
If it sits for a week, 2 weeks, especially 3+ weeks, the torque converter is probably half empty.

The pump doesn't pump in park either, so when you go from park to reverse, it has to fill the torque converter before it can build pump pressure.
It can take a couple seconds if it's been sitting a bit.

The remedy for this is start the motor, quickly shift to neutral for a few seconds before making your gear selection. In neutral the pump runs and will refill the torque converter.

Do an experiment (if you don't believe me)

Pull the pan and let the jeep sit.
It will keep dripping trans fluid for weeks.
You'll be able to remove about 6 quarts of the eight quart capacity.

When you do your filter and magnet, seal her up and never pull the pan again.
You can add an inline filter, trans cooler, and from now on, suck the fluid out once a year with a vacuum fluid extractor.
Do this with all your automatic cars and never have an automatic fail again.
I currently have 350,000 miles on a Hyundai automatic that I drive like it killed my mother.

I use the Topsider 5o6o.
it's designed for sucking oil from boat motors.
It will suck out a gallon of trans fluid in 10 seconds like it's water.
It will suck it out without crawling around on the ground like a snake and removing the 14 trans pan bolts.

Pour it in a container and add exactly what you remove, done till next year.
Ignore miles, change the trans fluid yearly.

My Jeep is NOT a Fiat!
Chrisnvegas is offline  
post #14 of 20 Old 08-17-2017, 07:47 PM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
You're explanation of the delay going into gear makes perfect sense. No doubts here. Checked out the topsider - I've GOT to get one of those.
jeepwiseguy40 is offline  
post #15 of 20 Old 08-17-2017, 09:45 PM Thread Starter
jeepwiseguy40
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2016
Location: Cortlandt Manor
Posts: 101
I found ATF+4 at Walmart. Can I definitely use this in my '87 YJ 4.2? I noticed some of you who do have 90's YJs.
jeepwiseguy40 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are On
Refbacks are On

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