pauls340
Well-Known Member
Is there a way to fix this Yoke seal leak without taking the pig out?
That's what happens when you get a brain-fart in 1973 and you sell your original 1971 Demon340 and you go from a Sure-Grip to a posi....but i'm backnow and going on 25 years.wtf is a posi
If you do that you might strip the threads. The posting (even in some service manuals) that say a 741 pinion nut should be torqued to 250 ft. lbs is incorrect. It's only a 5/8" thread so it only needs 150 ft. lbs. The newer 489 housing with the larger nut (and consequently larger threads) is the only one that needs 250 ft lbs torque. I also use loctite on them just to make sure they stay in placeJust be sure to re-torque the nut to 250ftlb,
The preload is set by shims on a 741, not torque like on a 489. And I've seen them strip when torqued too muchCalls for 240 ft lbs to set the preload so don't think the threads are going to strip.
I believe you are correct on the thread size of the smaller thread. I know it was smaller and was going off memory and just had surgery and taking pain meds so my memory is clouded. How many large thread 29 spline 741's have you seen? I haven't seen any. Not positive but I always assumed that in 40 yrs. of working on them and not seeing any 29 spline 741's they didn't make them, but maybe it was just luck of the draw.741/742/489 pinion coarse 10 spline nut is 3/4-16 thread -- fine 29 spline nut is 7/8-14 thread --- not 5/8 thread.
How do shins set a load? Shims adjust a depth. Torque sets a load.