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07-22-2011, 08:32 PM
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FSJ Maniac
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Join Date: Nov 20, 2008
Location: Wilds of Ellington, CT
Posts: 3,837
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Tranny fluid level detector
You know its time to replenish the leaky tranny another quart when the tranny starts to slip when taking off around a corner. 
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Jeepasaurus (Wagonus Grandi quadropedus)
88 GW 360-.030 over/2150/727/229/Posi, e-pump, AC (broke), tow package, Monroe Air Shocks, dizzy manifold vacuum, CTO-Free, AIR-free, oil & tranny coolers, dried knuckle blood all over, GM 350 TBI in a box, waiting...
"You're an FSJ'r when the parts guys memorize your name, phone & credit card#."
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07-22-2011, 09:56 PM
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Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 5,313
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LOL
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Originally Posted by Rich88
You know its time to replenish the leaky tranny another quart when the tranny starts to slip when taking off around a corner. |
you talking about the atfs
Automatic
Transmission
Fluid
Sensor |
07-23-2011, 03:12 PM
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Bleedin' Gasoline
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Join Date: Jan 09, 2011
Location: Flagstaff, AZ
Posts: 2,276
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I wish my tranny had that feature. I once had a cooler line fail and lost 4 quarts without knowing untill I got home.
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1972 Custom Wagoneer:
AMC 360 MC2150, THM400, Dana 20, 3.31 gears.
1965 Rambler Ambassador 990:
AMC 327, Borg-Warner Auto.
1973 AMC Ambassador:
AMC 360 MC4300, TC-727.
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07-23-2011, 07:51 PM
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Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 5,313
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when you tranny starts slipping
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Originally Posted by FSJunkie
I wish my tranny had that feature. I once had a cooler line fail and lost 4 quarts without knowing untill I got home.
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That is the ATFS  |
07-25-2011, 10:27 AM
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Join Date: Feb 19, 2010
Location: london England
Posts: 175
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My ATFS works when reversing too
low fluid means delayed engage and slight slip...when full drops straight in!
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1990 White Grand Wagoneer 360
1998 Green XJ Cherokee 4 litre LTD euro spec
1964 Red Ford Falcon Sprint 289 5 speed
1961 Red Austin Healey 3000
1971 Silver Honda 500 Four
1989 Pontiac Safari 8 seater wagon
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07-25-2011, 10:55 AM
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Bleedin' Gasoline
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Join Date: Mar 16, 2004
Location: Southwest Wisconsin
Posts: 2,402
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mine is better, I noticed a trail on the gravel when I was backing up - blown cooler line
Then the wife saying "what is leaking under the truck?" - other line blew
don't know how I got lucky and they both let go right at the house...
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07-25-2011, 11:02 AM
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Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 5,313
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You know mine does that
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Originally Posted by eurowag
My ATFS works when reversing too
low fluid means delayed engage and slight slip...when full drops straight in! |
I was talking to a very knowledgable mechanic about this & he told me that when in park the 727 does not pump fluid so when you first start going there is a delay that seems like slipping before the pump starts pumping. It's normal to do that. I did not know that but i know mine does it. |
07-25-2011, 07:51 PM
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FSJ Maniac
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Join Date: Nov 20, 2008
Location: Wilds of Ellington, CT
Posts: 3,837
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Alright...to get technical...there's a point where the fluid is low enough so that when you back up and or make a turn, the fluid level sloshes away from the filter/intake for a moment. So the pump loses pressure. When you straighten out it regains the fluid level. But its a good wake up call to get another quart from out of the box in the back...or drive straight to the nearest ATF supply if you once again forgot to keep yourself replenished.
__________________
Jeepasaurus (Wagonus Grandi quadropedus)
88 GW 360-.030 over/2150/727/229/Posi, e-pump, AC (broke), tow package, Monroe Air Shocks, dizzy manifold vacuum, CTO-Free, AIR-free, oil & tranny coolers, dried knuckle blood all over, GM 350 TBI in a box, waiting...
"You're an FSJ'r when the parts guys memorize your name, phone & credit card#."
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07-25-2011, 08:18 PM
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Member
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Join Date: Feb 12, 2011
Location: CA
Posts: 185
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pardon the stupid question, but do you check the fluid level when its running? Park, drive, on, off? Never had an auto before haha
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07-25-2011, 08:21 PM
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FSJ Maniac
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Join Date: Feb 21, 2010
Location: Chicagoland
Posts: 2,851
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Quote:
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Originally Posted by catch2otwo
pardon the stupid question, but do you check the fluid level when its running? Park, drive, on, off? Never had an auto before haha
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For the 727 trans, check it with the engine at idle and the trans in neutral.
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07-25-2011, 08:28 PM
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Join Date: Feb 12, 2011
Location: CA
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According to the facts and figures page in the Tech library, I have a th400
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1972 Wag
Build thread
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07-25-2011, 08:30 PM
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Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 5,313
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totaly agree it's low
Quote:
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Originally Posted by Rich88
Alright...to get technical...there's a point where the fluid is low enough so that when you back up and or make a turn, the fluid level sloshes away from the filter/intake for a moment. So the pump loses pressure. When you straighten out it regains the fluid level. But its a good wake up call to get another quart from out of the box in the back...or drive straight to the nearest ATF supply if you once again forgot to keep yourself replenished.
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Catch 202 you check it idling & engine warm in neutral on 727 & park on 400
Last edited by serehill : 07-25-2011 at 08:34 PM.
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07-25-2011, 08:31 PM
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Member
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Join Date: Feb 12, 2011
Location: CA
Posts: 185
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many thanks!
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1972 Wag
Build thread
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07-25-2011, 09:33 PM
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Bleedin' Gasoline
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Join Date: Jan 09, 2011
Location: Flagstaff, AZ
Posts: 2,276
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THM 400 doesn't care is it's in P or N. It works either way. I'm still surprised my tranny was still working fine 4 quarts low. Tough tranny!!! Can't kill a THM400!
__________________
1972 Custom Wagoneer:
AMC 360 MC2150, THM400, Dana 20, 3.31 gears.
1965 Rambler Ambassador 990:
AMC 327, Borg-Warner Auto.
1973 AMC Ambassador:
AMC 360 MC4300, TC-727.
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07-25-2011, 10:08 PM
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FSJ Maniac
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Join Date: Aug 08, 2010
Location: Maryland/ Williamsport, PA
Posts: 2,951
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Quote:
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Originally Posted by serehill
Catch 202 you check it idling & engine warm in neutral on 727 & park on 400
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Always though park and neutral were the same thing. Only difference is the parking pin is engaged. Wouldnt the ATF pump be moving at the same speed?
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Austin
1991 Hunter Green Grand Wagoneer
5.9 2bbl-727-NP229-TFI-30x9.5 Firestone M/T's-Brush Guard-tire mount
SOON: 4350 and cast iron intake
Others:
-1994 Baby Grand
-2000 XJ cherokee on Tons
-1953 REO M35A2 6x6
-1955 Willys Pickup
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Originally Posted by rustywagoneers_com
i am not an addict, i can stop anytime.
i dont have a problem, you people have the problem.
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07-26-2011, 05:24 AM
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Bleedin' Gasoline
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Join Date: Mar 16, 2004
Location: Southwest Wisconsin
Posts: 2,402
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Quote:
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Originally Posted by austinaubinoe
Always though park and neutral were the same thing. Only difference is the parking pin is engaged. Wouldnt the ATF pump be moving at the same speed?
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On the 727 the torque converter needs to spin to fill up, hence neutral. |
07-26-2011, 06:36 AM
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Join Date: Jul 30, 2003
Location: Normal, Oklahoma
Posts: 8,682
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The fluid passage is blocked on the 727 when in park.
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Mark B. Jones
Quote:
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Originally Posted by GrandWag&Prix
Actually, now that I think about it, that could be either awesome or really terrible.
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'76 401 Wagoneer
'79 Chief "Junaluska"
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07-26-2011, 07:54 AM
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Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 5,313
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X3
Quote:
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Originally Posted by austinaubinoe
Always though park and neutral were the same thing. Only difference is the parking pin is engaged. Wouldnt the ATF pump be moving at the same speed?
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The recommendation is neutral because the pump then fills everything to get a normal reading. I recently learned the 727 pump is not engaged in park so the level would look higher that it is. |
07-26-2011, 01:21 PM
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FSJ Maniac
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Join Date: Feb 21, 2010
Location: Chicagoland
Posts: 2,851
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Quote:
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Originally Posted by Billygoat
On the 727 the torque converter needs to spin to fill up, hence neutral.
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Quote:
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Originally Posted by serehill
I recently learned the 727 pump is not engaged in park so the level would look higher that it is.
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Just so everyone is clear- the pump and the torque converter are always turning/spinning if the engine is running.
Quote:
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Originally Posted by 710 Burner
The fluid passage is blocked on the 727 when in park.
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710 is correct, with a 727 a fluid passage is blocked in park that prevents the torque converter from filling. That's why you need to check it in neutral to get the actual level.
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07-27-2011, 09:37 AM
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New Member
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Join Date: Jun 12, 2011
Location: NoVA
Posts: 10
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Probably a stupid question, but what transmission fluid do i need for an '87 G'Wag? I thought i read something before that the fluid in the operations manual is not the right type to use nowadays?
Thanks,
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