has anyone install a "lock right" in a open 8 3/4 741 case???
69 340 barracuda auto
they list a 1240-LR for my application
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thanks I'll check but I didn't want to mess with bearings and ring pinion set up
Measure when you take it apart to see where you are but you just reset it to spec. .008 to .010. On an 8.75 there are no shims just adjustment nuts you use a spanner wrench on. It is all done on a bench. Doesn't get much easier. Hardest part is removing the center section.I assume your responding to me. If so I don't understand what you mean about messing with ring and pinion setup cause swapping out a differential doesn't require that. Cass will even press the side bearings on for a very small fee. Only thing you'll need to do is measure the backlash before you take it apart and set it back to that when you install the new differential. You'd have to do that with any type of differential or even a spool
So your saying that even if it measures .012 or .013" when you take it apart you set it to .008-.010"? If so that's a point of discussion. Most rearend tech's (me included) say set it back where it was so as to not disturb the pattern. Gears with miles on them will have a little wear so it's normal for the backlash to open up a little. If you only tighten them up .001-.002" it may not disturb it enough to be a problem but I've taken differentials apart with .013-.014" backlash that ran quiet going down the road. I'd be leary of tightening them up .005-.006".... Just my thoughtsMeasure when you take it apart to see where you are but you just reset it to spec. .008 to .010. On an 8.75 there are no shims just adjustment nuts you use a spanner wrench on. It is all done on a bench. Doesn't get much easier. Hardest part is removing the center section.
Nothing wrong with that if it works for you. I have been a profession mechanic for 25 or so years. I have learned that if you talk to 5 different mechanics you will get 5 different opinions on how to do different things. I have always used factory specs when setting them up. Old gears , new gears etc. I have never personally had a noise come from a set up that was not already there. I have set up more axles than I can remember. In all honesty I do not think that tightening it up .004 to .006 if it was slightly loose will make any noise. On the other hand too loose will definitely make noise. If you take it apart and it is way out of spec say .025 or more. I would drop it where it is supposed to be and run it. Just my opinion.So your saying that even if it measures .012 or .013" when you take it apart you set it to .008-.010"? If so that's a point of discussion. Most rearend tech's (me included) say set it back where it was so as to not disturb the pattern. Gears with miles on them will have a little wear so it's normal for the backlash to open up a little. If you only tighten them up .001-.002" it may not disturb it enough to be a problem but I've taken differentials apart with .013-.014" backlash that ran quiet going down the road. I'd be leary of tightening them up .005-.006".... Just my thoughts
That's a trade secret you just gave away for free!Also to be honest I really only bust out the dial indicator if I am worried. Most of the time I do it by feel anyway.