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ZUKIWORLD Discussion Forum => Technical Discussion - Performance / Modify => Topic started by: Momo on February 16, 2012, 05:10:05 PM

Title: Torque on Rear Pinion nut?
Post by: Momo 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.

Title: Re: Torque on Rear Pinion nut?
Post by: my88samurai 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.

Title: Re: Torque on Rear Pinion nut?
Post by: BRD HNTR 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 (http://www.acksfaq.com/samuraiDifrebuildFSM.htm)

Title: Re: Torque on Rear Pinion nut?
Post by: Drone637 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!