autopar3000
Well-Known Member
Sounds like we're all on the same page here. The pinion is not the weakest link on any of the three cases. So I'm thinking the biggest problem with the 741 is the lack of available ratios these days.
Puzackly.Same file folder as the cast crank myth.
That’s what I had in mine, a 741 open 3.55 that someone before replaced a 3.91 SG with (likely a 741 case as well) I put some 3.73 gears in it as that’s all I could find before passing it on. There is an article by one of the better known differential specialists comparing the three cases. The gist of the article was that there’s nothing wrong with the 741, it’s plenty strong obviously to a point just like the others.Found a 741 sure grip 3.91 in a 67 Dodge 100 van.
That's $500 CAD, so about $50 USDOpen 8 3/4 diffs going for at least $500? I bought a decent one last year for $50 (742). Geesh!
That's $500 CAD, so about $50 USD
Just kidding, it's about $375. I've recently seen a 2.94 ratio for $150 CAD, so $500 might be over valued for a 3.55. I guess it depends on how badly someone wants it.
I was contemplating changing gears from 3:23 to 3:55, but not sure if there would be much "gain".
The original 741 in my car went well over 100k miles and I beat the hell out of it. I took the cone sure grip out of the original 741 and put it in a 489 case 391 center and eventually the cones wore out. But the original 741 bearings, gears, housing I still have in storage and are in pristine perfect condition no signs of wear on any of the parts.
That's how stupid people are lolI have a 742 open with 3.23 that I couldn't give away on craigslist last year. Sitting in a bucket taking up space.
I'll take 742 over a 489 any day.I have a 742 open with 3.23 that I couldn't give away on craigslist last year. Sitting in a bucket taking up space.
About 10-12 years ago I had 6 open 741 rears of various ratios for $25 each.Open 8 3/4 diffs going for at least $500? I bought a decent one last year for $50 (742). Geesh!
A couple hundred rpm at every speed, a little more gitty upI was contemplating changing gears from 3:23 to 3:55, but not sure if there would be much "gain".