here is a good link on the GV pump viewtopic.php?f=17&t=19613&hilit=GV+pump but the pics seem broken.
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| air operated GV front diff https://auszookers.com/forum/viewtopic.php?f=5&t=33540 |
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| Author: | laurie [ Wed Jun 20, 2012 10:08 am ] |
| Post subject: | air operated GV front diff |
i have a 99 GV with the steel front diff the front diff does not engage but the air pump works fine any idea's ? can i strip the diff and lock it (not diff lock ) then use vit hubs to engage /disengage 4wd ? or what other options are open for me ? |
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| Author: | fordem [ Wed Jun 20, 2012 10:22 am ] |
| Post subject: | Re: air operated GV front diff |
Define "works fine" - how did you test it? Just so you understand where I'm coming from, if you're hearing the pump running it doesn't mean it works fine, you can still have a defective pump even though it pumps air. If the freewheel clutch actuator has in fact failed, your options are to fit a diff center from an earlier Vitara (just don't ask me which one), manually engage the clutch and then either weld it engaged or lock it in position with nylon cable ties. |
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| Author: | atari4x4 [ Wed Jun 20, 2012 11:01 am ] |
| Post subject: | Re: air operated GV front diff |
here is a good link on the GV pump viewtopic.php?f=17&t=19613&hilit=GV+pump but the pics seem broken.
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| Author: | laurie [ Wed Jun 20, 2012 11:40 am ] |
| Post subject: | Re: air operated GV front diff |
i have no nor have i ever had a 4wd light on the dash (but i did buy second hand ) pump operates for aprox 3 seconds connected and about 10 with the line disconnected i can feel air coming out of the line so i assume the pump is operating thanks for the link Atari i have a link to a pommy site that has the cable tie fix |
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| Author: | gvzookdriver [ Wed Jun 20, 2012 4:08 pm ] |
| Post subject: | Re: air operated GV front diff |
I would replace the whole center with a vit one, manual hubs and put a new bush and seals in there to stop the CV popping out. becomes all manual then and fool proof this is the seal im talking about viewtopic.php?f=17&t=6953 |
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| Author: | fordem [ Thu Jun 21, 2012 2:56 am ] |
| Post subject: | Re: air operated GV front diff |
atari4x4 wrote: here is a good link on the GV pump viewtopic.php?f=17&t=19613&hilit=GV+pump but the pics seem broken. Must've gotten lost during the server migration - I'll see what I can do to repost them this evening. |
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| Author: | fordem [ Thu Jun 21, 2012 3:02 am ] |
| Post subject: | Re: air operated GV front diff |
laurie wrote: i have no nor have i ever had a 4wd light on the dash (but i did buy second hand ) pump operates for aprox 3 seconds connected and about 10 with the line disconnected i can feel air coming out of the line so i assume the pump is operating thanks for the link Atari i have a link to a pommy site that has the cable tie fix That does sound like the pump is fine, but, it would be extremely rare for the pump to cut off after 3 seconds without engaging the freewheel clutch - unless there was a blockage in the line between the two. Can you get hold of a hand pump?  This is what I use - connect it to the diff and with no more than 10 psi, you should hear the actuator transfer and if you rotate the front drive shaft, you should feel it click in. |
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| Author: | Built4thrashing [ Thu Jun 21, 2012 11:49 am ] |
| Post subject: | Re: air operated GV front diff |
You say the 4wd light on the dash doesnt work? is it the globe or a fault in the air operation? |
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| Author: | gvzookdriver [ Thu Jun 21, 2012 12:24 pm ] |
| Post subject: | Re: air operated GV front diff |
i replace the center of my GV for a vitara one so no more air bag, still kept the compressor just plugged the outlet and i still had the light in mine. |
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| Author: | laurie [ Thu Jun 21, 2012 1:16 pm ] |
| Post subject: | Re: air operated GV front diff |
Built4thrashing wrote: You say the 4wd light on the dash doesnt work? is it the globe or a fault in the air operation? light what light ? until Coffin bay i thought only sierra's had such a high level of technical wizardry i will rip out the dash and have a look at the bulb |
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| Author: | laurie [ Thu Jun 21, 2012 1:16 pm ] |
| Post subject: | Re: air operated GV front diff |
Built4thrashing wrote: You say the 4wd light on the dash doesnt work? is it the globe or a fault in the air operation? oops double post |
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| Author: | laurie [ Thu Jun 21, 2012 1:16 pm ] |
| Post subject: | Re: air operated GV front diff |
Built4thrashing wrote: You say the 4wd light on the dash doesnt work? is it the globe or a fault in the air operation? as above 
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| Author: | laurie [ Thu Jun 21, 2012 2:16 pm ] |
| Post subject: | Re: air operated GV front diff |
well i do have a light. and the bulb is good. but it does not light up when the transfer lever is put in 4wd 
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| Author: | Chop [ Thu Jun 21, 2012 3:38 pm ] |
| Post subject: | Re: air operated GV front diff |
Hmm, wonder if the transfer is working? |
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| Author: | laurie [ Thu Jun 21, 2012 5:49 pm ] |
| Post subject: | Re: air operated GV front diff |
i will put it on stands in the morning and find out |
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| Author: | fordem [ Fri Jun 22, 2012 2:44 am ] |
| Post subject: | Re: air operated GV front diff |
Some GVs have a separate 4WD controller, some have this function built into the ECU/PCU (power train controller - handles buth engine & transmission) - the controller turns the light on & off based on electrical feed back from the pump module - a defective pump module OR a problem internal to the diff can cause the light not to turn on - in fact, typically anything preventing 4WD from being engaged will result in the light not coming on. It's possible to reach the front drive shaft without jacking the vehicle up (at least I can), just set the hand brake, select 4HI, engine off, slide under, grab the drive shaft & twist it - it should not turn. |
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| Author: | laurie [ Fri Jun 22, 2012 7:41 am ] |
| Post subject: | Re: air operated GV front diff |
the front drive shaft does not turn in 2wd or 4wd with handbrake on and gearbox in neutral nor does it turn in 4wd when front wheels are jacked up and spun by hand |
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| Author: | laurie [ Sun Jul 01, 2012 5:30 pm ] |
| Post subject: | Re: air operated GV front diff |
i put my rear axle on stands today and idled in first gear. then i changed from 2wd to 4wd without using the clutch. after about twenty changes there was a loud bang from under the car and it tried to pull off the stands. so i think i have 4wd back but now the ABS light is lit at all times. any ideas on this ? i have read that if you do not use the 4wd system it becomes hard to select and i was told when i bought it that this car had never been off road so 12 years no use.............................. |
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| Author: | atari4x4 [ Sun Jul 01, 2012 5:56 pm ] |
| Post subject: | Re: air operated GV front diff |
 safebefore disconnecting the battery pull error codes to see if there are any & then disconnect it for a few minutes to clear the ecu & see if any come back. there is an attachment nearly at the bottom of this page on how to pull the codes viewtopic.php?f=5&t=6451&hilit=j20a+error+codes SQ625 codes are in here viewtopic.php?f=5&t=31555&hilit=j20a+error+codes |
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| Author: | laurie [ Sun Jul 01, 2012 6:06 pm ] |
| Post subject: | Re: air operated GV front diff |
atari4x4 wrote: 8O safe before disconnecting the battery pull error codes to see if there are any & then disconnect it for a few minutes to clear the ecu & see if any come back. there is an attachment nearly at the bottom of this page on how to pull the codes http://www.auszookers.com/forum/viewtop ... rror+codes SQ625 codes are in here http://www.auszookers.com/forum/viewtop ... rror+codes i should have mentioned that i have disconnected the battery for 15 min before i posted |
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| Author: | laurie [ Tue Jul 03, 2012 12:28 pm ] |
| Post subject: | Re: air operated GV front diff |
o/k i pulled the codes this morning only one code 12 anyone know what that is ? i can not find any info on it ..... yet |
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| Author: | atari4x4 [ Tue Jul 03, 2012 12:42 pm ] |
| Post subject: | Re: air operated GV front diff |
auto or manual? |
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| Author: | laurie [ Tue Jul 03, 2012 1:10 pm ] |
| Post subject: | Re: air operated GV front diff |
manual |
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| Author: | fordem [ Tue Jul 03, 2012 10:14 pm ] |
| Post subject: | Re: air operated GV front diff |
A code 12 indicates the ECU is not detecting any errors - and on a manual transmission vehicle, you're unlikely to see any codes that relate to the transmission or transfer case (or 4WD control system), they're not controlled by the ECU. |
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| Author: | Built4thrashing [ Wed Jul 04, 2012 6:44 am ] |
| Post subject: | Re: air operated GV front diff |
Awsome. An error code to tell you there are no errors detected. WTF. |
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| Author: | laurie [ Wed Jul 04, 2012 8:01 am ] |
| Post subject: | Re: air operated GV front diff |
so my engine is good my 4wd works my 4wd light does not and my abs light is on no broken wires or dud connections that i can find time to grab the multimeter and rip the wheels off abs light is off  step two started with " take it for a road test" the light cleared before i got out of the driveway  thanks for all your help |
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| Author: | got_bar_work [ Wed Jul 04, 2012 1:39 pm ] |
| Post subject: | Re: air operated GV front diff |
Sorry to hijack Stupid idea Could u put a gv diff in the sierra rear Then u could disconnect it and do front digs |
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| Author: | Built4thrashing [ Wed Jul 04, 2012 3:35 pm ] |
| Post subject: | Re: air operated GV front diff |
got_bar_work wrote: Sorry to hijack Stupid idea Could u put a gv diff in the sierra rear Then u could disconnect it and do front digs No you cannot. GV diff center is bigger than sierra |
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| Author: | got_bar_work [ Wed Jul 04, 2012 6:19 pm ] |
| Post subject: | Re: air operated GV front diff |
I thought the fronts were the same as rears Gears fit and im running a sierra hemisphere in my gv carrier |
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| Author: | dhula [ Thu Jul 05, 2012 11:36 am ] |
| Post subject: | Re: air operated GV front diff |
laurie wrote: but now the ABS light is lit at all times. any ideas on this ? This ^^^^^^ is due to doing this vvvvvvvv laurie wrote: i put my rear axle on stands today and idled in first gear. The ABS system registers the rear wheels moving but the front wheels not and after a set nubmer of rotations or distance or time considers the front sensors (at the wheel) to be faulty due to no signal and goes "Hey dude, look at this pretty light on the dash that tells you something is wrong" As soon as you drive and all wheels are moving and all sensors are registering that they are moving the ABS will think all is well and turn of the light |
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