QT torque bias test

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Curly
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QT torque bias test

Postby Curly » Tue Oct 09, 2018 7:19 pm

I have a rebuilt QT I want to install in my Cherokee. I decided to do the torque bias test as outlined in the manual. Problem is I don't know what to expect. I think there is no slippage, I am maxing out my Torque wrench with no discernible change in the transfer case. I did remove the e-drive cover and shifter to make sure it isn't in e-drive. The shift collar is all the way back against the case and I cannot get it to move by prying on it with a screwdriver.
The only change I made to the case was the addition of a spacer in the differential. The exploded view shows one on each end of the gear set, mine only had one when I took it apart. I was able to source an identical spacer (same O.D, I.D and thickness) and installed it. I am wondering if this changed the preload.

Any advice/input?

Thanks
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

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fulsizjeep
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Re: QT torque bias test

Postby fulsizjeep » Wed Oct 10, 2018 11:19 am

I have been replying to your post in AZFSJ on Facebook.
Sent from my IBM 5150 using TN5250 emulation.

Flint Boardman ~ http://jubileejeeps.org
Embracing the Borg Warner QuadraTrac since 1980 http://jubileejeeps.org/quadratrac
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s, a few Evil Twin mods, http://eviltwinfab.com and a few TT's Fabworks mods, http://www.ttsfabworks.com
76 401 Wag, 77 401 Wag, 77 401 J20

78 Arizona Chief
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Re: QT torque bias test

Postby 78 Arizona Chief » Thu Oct 11, 2018 8:42 am

It sounds like it has far too much pre-load. I am a long time full-time QT enthusiast and prefer my diffs to operate at the lower range of torque bias as it seems to keep the diffs living longer. Now if I was living in the snow or rain I would want it to behave just like the manual prescribes. I live in dry hot az so it works for me. How did the diff look inside? If you want to pull the diff and bring it over, we can take a look at it. I also have extra washers and springs we can try inside that diff too to get it set.
Kevin
1978 Cherokee Chief: Parents bought new. 360/TH400/NOS Quadratrac, 44's/ARB's/4.10's, SOA, Shackle Flip, Alcan Springs, Bilstein 5100's, 35" BFG KM2s, custom bumpers, 324,000 miles and counting...

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Curly
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Re: QT torque bias test

Postby Curly » Thu Oct 11, 2018 12:32 pm

Hi kevin, I will be at TITD, do you mind if we look at there? Edit: If not, I can come down to the Phx area when it is convenient for you. I am in the Verde Valley, near Sedona.

Thanks
Tim
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

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Curly
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Re: QT torque bias test

Postby Curly » Wed Oct 31, 2018 9:06 pm

Bumping this. Kevin, sent you a PM.
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

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Curly
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Re: QT torque bias test

Postby Curly » Thu Nov 08, 2018 7:07 pm

Installed a .015" thrust washer today, the differential will now slip at 115psi on the Torque wrench. I have a video on AZ Full Size jeep on FB.
I think I did this correctly, time will tell.
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

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Cecil14
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Re: QT torque bias test

Postby Cecil14 » Thu Nov 08, 2018 11:06 pm

PSI on a torque wrench? Do you mean ft lbs? Or in lbs?


aa
Anthony

1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

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will e
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Re: QT torque bias test

Postby will e » Fri Nov 09, 2018 7:02 am

Did you hear from Kevin? I can call him for ya.
81 Wagoneer - 'WILL E' Retired

82 Cherokee WT - SOA/SF/high steer/Alcan springs/agr box/Borgeson steering shaft/AMC 401/performer/holley TA/HEI/BeCool/727/ALTAS (2.0/2.72/5.44)/D60 Snofighter(Yukon Zip,hubs,stubs,4.56)/14 Bolt (FF,BF shave, Discs, ARB,Artec Truss)/MTR 37X12.5/Corbeau Moab Seats/RCI 6point Harness/Hella Aux lights/tuffy console/killer32 sliders/custom bumpers and roll bar/WARN 8000/steering brace/CB/dual batts/custom TC skid plate

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fulsizjeep
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Re: QT torque bias test

Postby fulsizjeep » Sat Nov 10, 2018 7:26 am

Good news on using the thinner thrust washer! :-bd
Sent from my IBM 5150 using TN5250 emulation.

Flint Boardman ~ http://jubileejeeps.org
Embracing the Borg Warner QuadraTrac since 1980 http://jubileejeeps.org/quadratrac
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s, a few Evil Twin mods, http://eviltwinfab.com and a few TT's Fabworks mods, http://www.ttsfabworks.com
76 401 Wag, 77 401 Wag, 77 401 J20

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Curly
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Re: QT torque bias test

Postby Curly » Sat Nov 10, 2018 10:22 am

Cecil14 wrote:PSI on a torque wrench? Do you mean ft lbs? Or in lbs?


aa


Ft lbs, LOL. I've only been doing this all my life, I should know better!
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

User avatar
Curly
Posts: 203
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Re: QT torque bias test

Postby Curly » Sat Nov 10, 2018 10:22 am

will e wrote:Did you hear from Kevin? I can call him for ya.


I did, via PM on here. I'll talk to him at TITD.
I start what I finish.

77 Cherokee S
97 Jeep Wrangler

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Cecil14
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Re: QT torque bias test

Postby Cecil14 » Sat Nov 10, 2018 11:13 am

Curly wrote:Ft lbs, LOL. I've only been doing this all my life, I should know better!


Phew...I thought for a minute I needed to update my tool set. haha


aa
Anthony

1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank


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