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Torque on Rear Pinion nut?

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Offline Momo

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Torque on Rear Pinion nut?
« on: February 16, 2012, 05:10:05 PM »
I just finished rebuilding my rear diff in my 88 Sammi and am trying to find out what the torque spec is for the pinion nut. I know it has to crush the crush sleeve but I don't want to over tighten it. All the bearings are new and so is the crush sleeve ect.. Any help would be appreciated.
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88 Sammi, 1.3L with CV Harley carb and Thorley header, 6" SPOA, Trail Tough 2" springs, 4.62 gears with Lockrite Lockers, 4.16:1 TC, Customs bumpers. 33" Pitbull Rockers, And lot's of other little mods!
Time to get DIRTY!
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Offline my88samurai

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Re: Torque on Rear Pinion nut?
« Reply #1 on: February 17, 2012, 05:46:40 AM »
Tighten it until it has zero endplay. Just did mine a few weeks ago. I had to use a 3/4 impact gun. The crush sleeve is hard to get to start colapsing but once it starts it's not that bad. Keep tighting a little then feeling the play and keep doing it untill all tha play is gone.
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Offline BRD HNTR

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Re: Torque on Rear Pinion nut?
« Reply #2 on: February 17, 2012, 07:10:06 AM »
I believe the FSM says tighten it until it takes 11 inch pounds to rotate the pinion shaft.  It does take lots of torque (probably more than 150 ft/lbs) just to get crush sleeve to start crushing.  The pinion nut is not set by direct torque.  Go to the FSM or
ACKS has a file on rebuilding the differential.  http://www.acksfaq.com/samuraiDifrebuildFSM.htm
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93 Tracker,XL7 springs & 1" raised spring pads in front with YJ springs in back, home built bumpers rear & front (w/winch), 2" x 4" rock tubes,  ARB front & rear, converted Sami rear to IFS, 33x12.5x15  aluminum rims, roll cage, 2.7L w/5 speed auto.
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Offline Drone637

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Re: Torque on Rear Pinion nut?
« Reply #3 on: February 20, 2012, 01:22:29 PM »
We just did a diff this weekend, took a lot of force.  So I looked it up in the FSM, it lists 250-400lbs force may be required to crush the sleeve.  Fun times!
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