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  #1  
Old December 5th, 2017, 10:50
90xj06's Avatar
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Transmission hard lines leak

1988 XJ AW4.

I have a leak at the front most fitting on the transmission to the hard line. at the quick disconnect.

is there an oring kit for this. because i pulled it apart once and replaced it with a spare used hard line and that lasted about a month. and now its leaking again.

when i pulled it apart it had 2 orings and a plastic sleeve that fell out. what order does it go?

or is there an easy way to just go with a barbed fitting.
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  #2  
Old December 5th, 2017, 21:39
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Re: Transmission hard lines leak

The disconnect o-ring set up goes o-ring, spacer, o-ring. You should get new O-rings but keep that spacer. Otherwise, google up "Jeep transmission line connector". You should find the Crown o-ring set AND the plastic clip which will fix your leak for about $8.00 per connector

A similar set-up is used for the fuel lines. The *book* says every time you disconnect the fuel lines you need to replace the O-rings...but I've gotten away with re-using them few times. Possible, but not recommended.
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1990 XJ - 4.0L AW4 It's white.
1988 MJ - 4.0L AW4 It's green.
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  #3  
Old December 6th, 2017, 07:19
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Re: Transmission hard lines leak

i just ordered the oring kit and the part that goes into the transmission just in case. i hope it all goes easy.
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  #4  
Old December 6th, 2017, 20:14
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Re: Transmission hard lines leak

So, when you get that kit, you can re-use the plastic clip OR use the new clip. Tear the old plastic clip off the end of the line with some pliers. Slide the new clip on the tube (oriented the same way) until it *clicks* over the shoulder on the tube. Then slide an o-ring on the tube, then the spacer, then the other o-ring. Shine a flashlight into the female connecter of the tranny, make sure there are not any *extra* O-rings or pieces of o-ring inside there. Then take the tube, with the clip, the O-rings and the spacer and shove it into the hole until it clicks. The *ears* should click into the fitting.
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  #5  
Old December 6th, 2017, 21:36
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Re: Transmission hard lines leak

Quote:
Originally Posted by 90xj06 View Post
1988 XJ AW4.

I have a leak at the front most fitting on the transmission to the hard line. at the quick disconnect.
.........
or is there an easy way to just go with a barbed fitting.
What about converting to a barbed fitting? Are the transmission and radiator fittings standard sizes or are adapters needed?
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  #6  
Old December 7th, 2017, 09:47
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Re: Transmission hard lines leak

Quote:
Originally Posted by Runnin'OnEmpty View Post
What about converting to a barbed fitting? Are the transmission and radiator fittings standard sizes or are adapters needed?
i know the fitting on the trans is a 14mm 1.5 atleast from what i had found.

if i cant get the quick connects to not leak im going that route.
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  #7  
Old December 13th, 2017, 10:22
burntkat burntkat is offline
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Re: Transmission hard lines leak

A better idea would be to convert to JIC fittings with field-replaceable ends. There is no swage tool needed, the fittings screw right onto the hose.

Granted, the hose is *MASSIVELY* over-rated for the pressure you'll have in the lines (something like 4500PSI, you only have 50 in the lines themselves), but that's not a bad thing. The hose is less than $2/ft. Same stuff they use in forklifts and the like.

I had lots of issues with hardlines fracturing for multiple reasons with my S10. Cost me 3 transmissions. I changed to the JIC -6 stuff and haven't had another problem.
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-89 S-10: SAS, D44s front/rear. 5.7L V8. 700R4 with 4L60E upgrades. Built in my driveway.
-90 XJ 4.0, AW4, 231J: Clayton's longarms, RE 5.5" coils, hybrid 6" leaf pack, 33/12.50/15" MTs, Rancho 99012s and 99624s, Tera HD SYE, custom sliders, BW flares. Rehabbing with D44s, RE spring packs, RE 4.5" coils, and ACOS.
-94 ZJ: Budget boost, 31s. The wife's DD.
-97 XJ: Son's DD. 4" lift, ACOS, 4" spring pack, Upcountry coils, 31s
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  #8  
Old Yesterday, 17:14
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Re: Transmission hard lines leak

Mine tranny lines leaked where the metal line crimped to the rubber hose so I put new lines from napa on mine 98 xj year or so later they were leaking again same place so I cut the metal part out and replaced with tranny cooler hose been two years no leaks.
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  #9  
Old Today, 07:06
burntkat burntkat is offline
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Re: Transmission hard lines leak

You really need to make sure you flare the lines when you attach rubber hose to hardline. Otherwise, it's not if but when they will come off.
__________________
-89 S-10: SAS, D44s front/rear. 5.7L V8. 700R4 with 4L60E upgrades. Built in my driveway.
-90 XJ 4.0, AW4, 231J: Clayton's longarms, RE 5.5" coils, hybrid 6" leaf pack, 33/12.50/15" MTs, Rancho 99012s and 99624s, Tera HD SYE, custom sliders, BW flares. Rehabbing with D44s, RE spring packs, RE 4.5" coils, and ACOS.
-94 ZJ: Budget boost, 31s. The wife's DD.
-97 XJ: Son's DD. 4" lift, ACOS, 4" spring pack, Upcountry coils, 31s
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  #10  
Old Today, 08:21
RCP Phx RCP Phx is online now
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Re: Transmission hard lines leak

Quote:
Originally Posted by burntkat View Post
You really need to make sure you flare the lines when you attach rubber hose to hardline. Otherwise, it's not if but when they will come off.
You don't want a flare but a "bubble"!
https://www.holley.com/products/plum...s/parts/008ERL
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  #11  
Old Today, 08:45
burntkat burntkat is offline
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Re: Transmission hard lines leak

Quote:
Originally Posted by RCP Phx View Post
You don't want a flare but a "bubble"!
https://www.holley.com/products/plum...s/parts/008ERL
Thanks for that. It's a bubble flare.
__________________
-89 S-10: SAS, D44s front/rear. 5.7L V8. 700R4 with 4L60E upgrades. Built in my driveway.
-90 XJ 4.0, AW4, 231J: Clayton's longarms, RE 5.5" coils, hybrid 6" leaf pack, 33/12.50/15" MTs, Rancho 99012s and 99624s, Tera HD SYE, custom sliders, BW flares. Rehabbing with D44s, RE spring packs, RE 4.5" coils, and ACOS.
-94 ZJ: Budget boost, 31s. The wife's DD.
-97 XJ: Son's DD. 4" lift, ACOS, 4" spring pack, Upcountry coils, 31s
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  #12  
Old Today, 12:59
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Re: Transmission hard lines leak

so i changed the orings and its still leaking. im wondering if its not leaking from that. it looks to be spraying upwards and everywhere. im going to order some new hardlines
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