? vent pipe from rear diff??

#1 by Nik Rite , Tue May 19, 2020 10:41 am

Came out to find a black rubber pipe hanging from the top of the rear diff. One end attached to a pipe on the diff..the other end just dangling( its got a clip on it). Any idea whats it for and where it should go?? Ta Nik


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RE: ? vent pipe from rear diff??

#2 by 123hotchef , Tue May 19, 2020 4:14 pm

what truck?


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RE: ? vent pipe from rear diff??

#3 by Heathen , Tue May 19, 2020 7:37 pm

It's the breather - should go into a pipe fixed to the tubular cross member


'02 K74 single cab.


 
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RE: ? vent pipe from rear diff??

#4 by 123hotchef , Tue May 19, 2020 7:44 pm

i reakon its the diff lock pipe lets bet rob £50


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RE: ? vent pipe from rear diff??

#5 by Nik Rite , Tue May 19, 2020 9:09 pm

K74....and the answer is?


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RE: ? vent pipe from rear diff??

#6 by 123hotchef , Tue May 19, 2020 9:11 pm

we need a pic! i say diff lock pipe has snapped off the diff lock pump. sent it to me and ill fix it


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RE: ? vent pipe from rear diff??

#7 by Nik Rite , Tue May 19, 2020 10:04 pm

Thank Chef...currently wrestling with a bottle of wine...will take a couple of snaps tomorrow...any particular view do you want? Ill put it on the ramps and get a good look. The rear diff looks a little "wet",where the transmission shaft enters the diff...Is it a big messy job rebuilding it or just let it weep? Ta Nik


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RE: ? vent pipe from rear diff??

#8 by 123hotchef , Wed May 20, 2020 6:40 am

easy enough to re seal the diff, look up on the X member above the axle u will see the diff lock pump


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RE: ? vent pipe from rear diff??

#9 by Nik Rite , Wed May 20, 2020 7:04 pm

Ok the pipe goes to/from the accumulator to the diff..think its got a banjo going into the diff...Ive enclosed a photo...Re the rear diff..mines a locking rear with a flashing orange light switch to the right of the steering wheel. Just trying to figure out how it works...As i switch my dash switch,it powers up the rear pump to fill an accumulator to pump air somewhere into the rear diff? So in theory, if I switch that switch air should come out of it or does it pull a vacuum? What does it actuate in the diff? Normally I fix bicycles so this is all new to me. Help as ever much appreciated..Nik ps my winter list is getting longerBild entfernt (keine Rechte)


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RE: ? vent pipe from rear diff??

#10 by Heathen , Wed May 20, 2020 7:30 pm

It's a little compressor with a pressure switch. It should cut out at about 4psi, so putting your finger over the pipe should make it cut out. The orange dash light should go solid when the lock is engaged - flashing means 'something' is not working.


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Last edited 05.20.2020 | Top

RE: ? vent pipe from rear diff??

#11 by 123hotchef , Wed May 20, 2020 7:43 pm

any way pay up Rob!


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RE: ? vent pipe from rear diff??

#12 by Nik Rite , Wed May 20, 2020 10:07 pm

Thanks guys...ill try that blocking test to see if it makes any difference. So that orange switch turns on the compressor so if put the gear box in 4 wheel low (green light 4 wheel drive light on the dash) I should hear it purring and then stop at 4psi. Ta Nik


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RE: ? vent pipe from rear diff??

#13 by 123hotchef , Wed May 20, 2020 10:12 pm

yeh


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RE: ? vent pipe from rear diff??

#14 by Heathen , Thu May 21, 2020 8:39 am

I'll get you a barcardi breezer next meet!


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RE: ? vent pipe from rear diff??

#15 by Nik Rite , Fri May 22, 2020 2:17 pm

Bloody genius's...yep I can hear the pump running when the orange light is on...then finger over the pipe end ,it slows down until it ticked every 2/3 seconds..sounds right? Which begs the question why would mitzy do that when they could simply have the switch activating a solenoid in/on the diff??
Another question..my winter list is getting longer and I need the truck daily till end Oct...is it ok to leave things as they are or am I better off blanking the tube in the diff and from the pump. I didn't even know I had a locking rear diff and prob don't need it 99% of the time but its dead cool!!! Its smoking a bit and thats my first job this winter. Ta Nik


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rattle when started.
smart charger??

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