How to tell if I have a part time Q/T (Update)

[J10/J20 Project]

Hey All,
Can you have lockout hubs and not a part time Q/T case? Under the primer from PO I see 3 stickers on my truck on the fenders. Honcho, Levis, 2x4 conversion. I would bet I do have a part time kit in it. If it came like this from the factory? Is there anyway to check it without splitting the cases?

Thank's,
Paul

[ October 02, 2003, 11:51 PM: Message edited by: J10/J20 Project ]

[J10Mike]

quadratrac didn't come part time from the factory. only full time 4wd. however, if you have lockouts on the rig, chances are that somebody did a part time conversion.

mike

[Kenall]

with the jeep in park and the hubs unlocked, spin the front shaft.

but it is possible to have a full time case with front hubs, but only if the PO burned out the QT diff unit in the case and dint want to replace it so he runs in E drive mode all the time locking in the front hubs when needed.

[billybooster]

not wishing to hijack but I think I have the same question that has had multiple types of previous answer.

From Kenall:jeep in park, hubs locked, axle doesn't spin = 4wd or not?

If internal vacuum switch is selected, Edrive light comes on but with hubs not locked shaft should/shouldn't spin?

Just looking for all variations to same q!

[The Anti-Chrysler]

If the Q/T had a part time kit, there wouls have to be some kind of shift lever coming out of it, exclusive of any low-range unit. I've never heard of a part time conversion. It doesn't seem to make sense based on the operation of the case.

[jeepguzzi]

Mile Marker has made a part time conversion kit for a long time. It utilizes the "emergency" drive vacume switch in the glove box to shift into and out of four wheel drive. No shift levers required!!

[J10/J20 Project]

I forgot to mention it is sitting on the garage floor. Is there a way to check it out, out of the vehicle?

[Sitting Bull]

Originally posted by J10/J20 Project:
I forgot to mention it is sitting on the garage floor. Is there a way to check it out, out of the vehicle?--------

On the back of the QT, there is a diaphragm with two nipples. Attach a vaccum hose to each of the nipples, and apply vaccum. If one of them lets the front output spin freely, it's part time.

[ October 02, 2003, 07:40 AM: Message edited by: Sitting Bull ]

[J10/J20 Project]

I have a vacuum pump so it should be to hard. I will check it out tonight. So do I need to apply vacuum seperately to each line or together? Do I need to plug one line while checking the other? So if I only have one vacuum pump and one line. If I hook up one hose to the diaphram and pump and apply vacuum and the front yoke doesn't lock up I have a part time case? It should lock in on one of the diaphram line when vacuum is applied even if I had a part time kit? So it would lock up on both diaphram lines with vacuum applied if it was still a full time case?

[Sitting Bull]

So do I need to apply vacuum seperately to each line or together?

Seperately

Do I need to plug one line while checking the other?

Nope

So if I only have one vacuum pump and one line. If I hook up one hose to the diaphram and pump and apply vacuum and the front yoke doesn't lock up I have a part time case?

Yip, or something is drastically wrong with the QT

It should lock in on one of the diaphram line when vacuum is applied even if I had a part time kit?

Yip

So it would lock up on both diaphram lines with vacuum applied if it was still a full time case?

More than likely. I'm giving you the scenario for a P/T QT in good working order. There may be problems with it that cause a different outcome. But for most cases (pun intended), this info will be correct.

[J10/J20 Project]

very good info,

Thanks for the help.

Paul

[bvibert]

Originally posted by The Anti-Chrysler:
If the Q/T had a part time kit, there wouls have to be some kind of shift lever coming out of it, exclusive of any low-range unit. I've never heard of a part time conversion. It doesn't seem to make sense based on the operation of the case.What cave have you been living in? :confused: tongue.gif

3rd item down...
http://www.milemarker.com/4x2conversion.html

No extra levers, it just replaces the factory diff in the QT with a sprocket that is engaged and disengaged with the same vacum shift motor

[ October 02, 2003, 10:30 AM: Message edited by: bvibert ]

[J10/J20 Project]

Here is what I did. I don't have a rear yoke on, I hope that doesn't make a difference.
1. I applied vacuum to the rear nipple, the rear output shaft moved (yoke shaft slide's)out about a 1/2" and when turning the rear spline's the front moves with it. When turning the front the rear doesn't turn.
2. With vacuum applied to the front nipple the shaft move's (yoke shaft slide's)in and when turning the rear spline's the front turns also. When turning the front the rear turns also.

This should mean I have a part time case?

Thank's for all the help,

Paul

[J10/J20 Project]

btt

[Don S]

Originally posted by J10/J20 Project:
Here is what I did. I don't have a rear yoke on, I hope that doesn't make a difference.
1. I applied vacuum to the rear nipple, the rear output shaft moved (yoke shaft slide's)out about a 1/2" and when turning the rear spline's the front moves with it. When turning the front the rear doesn't turn.
2. With vacuum applied to the front nipple the shaft move's (yoke shaft slide's)in and when turning the rear spline's the front turns also. When turning the front the rear turns also.

This should mean I have a part time case?

Thank's for all the help,

Paul..
J10/J20 Project:
I can only guess... It would seem to me that the drive shafts would feel locked together weather in or out of e-drive with a good BW-1339 case. I have worked on them but never tried rotating the DSs like that. If it were me, and since it's on the floor, I'd open it up and see if it has the cone clutches and see if they are in good order.
... To operate the BW-1339 e-drive the locking ring must slide back and forth. The front nipple locks it into ‘e-drive and the rear ‘nipple’ un-locks it.

Here are some BW-1339 links;

link>QT TESTING 3 WAYS (http://groups.msn.com/JEEPTECH101/jeeptech.msnw)
link> Flints QT cutaway pic (http://www.frontier.net/~mystkblu/qt_cutout.htm)
link>QT INFO (http://www.t-r-j.com/Auto/QT/quadratrac.htm)
link>RBs QT INFO (http://home.earthlink.net/~riverbeast/qt01.htm)
link> BW1339 repair INFO (http://www.jpmagazine.com/techarticles/23658/)
link> BW1339 Vacuum PIC (http://www.fullsizejeeps.com/jeeps/files/Parts-Junkyards/bwqt_vac.jpg)
link>RBsFSJ QT1339 CONES (http://www.ifsja.org/ubb/ultimatebb.php?ubb=get_topic;f=3;t=007239)
link>e-drive SWITCHES (http://www.ifsja.org/ubb/ultimatebb.php?ubb=get_topic;f=2;t=009894)
link> Franks in Norway QT mods (http://www.fullsizejeep.com/1024/transfer.htm)
link> Franks in Norway QT mods (http://www.fullsizejeep.com/1024/2/shiftermods.htm)

Good luck and http://www.michiganjeepers.com/forums/images/graemlins/wave.gif and … CUL.. Don S..

[bvibert]

Did you get it figured out??

I'm a few days late, but it sounds like you probably don't have a PT kit installed. Since the front and rear shafts move together, more or less, whether the lock ring is engaged or not.

I second the suggestion to open it up since its out of the vehicle anyway, you should be able to tell the difference by lookig at it and comparing to pics on the web. Plus then you'll get a chance to check out everything while you're in there! smile.gif

[35sNoLift]

I'll third the motion.
Splitting the case isn't too hard to do. Make sure you get all the bolts out since some of the reduction units bolts hold the halves together. A second set of hand will help balance the case while yur opening it.
Things to look for would be evidence of the chain hitting the inside of the case (worn out chain) general debris in the oil, and cracks in the case.
I recently opened a case from one of my trucks for a looksee and found all of the above wrong with it! Funny that it didn't leak or make noise.

[Frustrated]

Don't Split the case if you don't have to! The hands down easiest way to see if the QT has a PT kit is to actually look and see with your own eyes (especially if the QT is out of the vehicle).

This may be difficult if you have never seen a PT QT before but it still can be done and after you see it once you will never forget.

So, what do you do? Remove the two bolts from the inspection cover that is directly in front of the vacuum shifter (this the cover that has the breather in it). Then, look down and check out the coupler that the shift fork moves back and forth (the coupler is between the "legs" of the fork). If the QT is stock then all you will see is the coupler - it is just a doughnut that slides back and forth over the output shaft. On the other hand, if the QT is PT then the coupler will have and extension on it toward the front of the case. The extension is a hollow cylinder that covers the output shaft. There are splines on the outside of this cylinder.

In the pic below, the coupler is at the very top in the center. The "doughnut" is on top and the extension is facing down. You can see the splines on the outside of the extenstion that I referenced above. http://milemarker.com/images/quadra.gif

Also, I higly recommend you check out some pics of the QT to orient yourself. I especially like the cut-away pic and any pic from a parts mag.