Jaguar Repair: XJ6 Rear rotor install, ft lbs torque, flange nuts
QuestionQUESTION: Howard,
What's the torque setting for the nuts that hold the rotor to the driveshaft flange ? I cant't find it, the bolts are 7/16 20 tpi, not sure if they are grade 5 or 8. The nuts appear to be nylocs but I think they are the type that have the end crimpted over to lock rather that using nylon...
Thanks,
Steve.
ANSWER: The "drive shaft" (axle half shaft) flange to the differential flange nuts are 49 to 55 ft lbs torque.
The terminology used by the British and the US is a little different in places. The British call the shafts from the differential to the wheel as "Drive shafts" and the transmission to the differential is a "Propeller shaft".
In the US the trans to the differential is a "Drive shaft" and the differential to wheel is an "Axle half shaft" so it can get confusing at times.
Howard
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QUESTION: Howard,
Ok so what I'm talking about are the nuts that hold the u-joint flange of the driveshaft to the brake disk to 1/2 shaft flange ! What a mouthful ! Based on your spec the nuts sound like they are grade-5 I wasn't sure and didn't want to over tighten them. What do you call those self locking nuts - 'torque-loc' ? Regarding the transmission (not the diff), what type of ATF do you recommend ? I heard dextron vs others affects the shifting quality ?
Thanks again Howard,
Steve.
AnswerI have heard the term torque-loc used. You may be right on the grade of the bolts but that torque setting came out of a factory service manual so it should be good. I don't think I ever torqued those nuts.
The factory recommended Type "G" which was not available in the US so we used Type "F" which we were told was the same as Type "G". But now an automatic transmission shop tells me that they have eliminated "F" and everything uses Dextron now. I'm not sure that is correct so you should ask a local transmission shop what type to use in a Borg Warner "66" transmission to see what they say.
Howard
