I´m doing a Toy axle swap for a customer and, as always, there are a number of other "small items" to do while yer at it. High steer, lockers, lower R&Ps. And it´s with the lower R&Ps that I´ve a question.

The original R&Ps were just over a 3 to 1 ratio, don´t rightly remember right now. But no matter, it´s not important anyway. The issue is that both of these sets had a 2,0 mm shim between the pinion and bearing. All well and good, I removed the bearings from the first pinion and pressed them on the new one. No big suprise, but the first pattern wasn´t good. In fact is was terrible, I mean WAY the fawk off......... :confused: wanting the pinion closer to the ring.

OK, off with the bearings once again (good thing I´ve got a decent puller :) ),this time I pressed the bearing on leaving a 4 mm gap between the pinion and the bearing, that´d be enough for sure. Wrong, still wanted more!!! Now I´m thinking that I´ve fawked something up, but I decided to try again. Leaving around 6 mm of gap, the pattern switched over to the other side. Adjusting again to 5 mm, the pattern looks good. :smokin:

For the other diff, I started off directly at 5 mm and the pattern was really close on the first try........ I´m turning some 5 mm thick shims today and after the new crush sleeves and pinion nuts arive, I´ll finish these off.



Is this big difference in shim thickness normal when going from 3x to 5x gears?!? I did notice that the gear of lower ratio pinion is taller than these 5.27s that I´m installing..........

TIA,

I am assuming that you turned the spanners, so the you moved the ring gear closer to the pinion (or the backlash would be measured in feet instead of inches). I have never seen, or heard, of a pinion taking that much shimming.
If your pattern is good, I would say go for it, but it does sound like too much.

5mm = 0.196" right?
I would probably call, or e-mail someone like Randys R&P, Reider Racing, or others to confirm that this is normal.
I'm definitely not a R&P expert or a toy expert.
Might ask in the toy forum too.

Yup, 5 mm = 0.196".......

I set the backlash at 0.008" (0,20 mm). I think I´ll do the e-mail thang to Randy´s, he bought the gears there..........

Thanks,

Or post in the toy fourm :flipoff2:

The pinion shim thickness all depends on the brand of the gears, alot of the time. I would call randys and ask what size shim to start with and they will have a very good idea what thickness for the brand of gears. They will also know top end tolerence and bottom so you will no when youve gone too far.

Or post in the toy fourm :flipoff2:


Those guys are mean, they´ll just call me names and make me cry........ :crybaby:



















SHADAP!!!!!!!!! :flipoff2: :flipoff2:

Bill,
What is the verdict?
What is the solution?

Probably another one of those "left handed" south american things that were never designed to be used off road :flipoff2:

And a big SHADAP fer you as well........... :flipoff2:


And just for your info, we happen to drive on the right side of the road, just like they do in he States. Course, you beein from western West Virginia and all, wouldn´t know too much about the concept of TWO laned roads, now would ya......... :flipoff2:


.......OK, before some dumfawk gets all up in arms about the WV crack, I happen to like that area very much. I lived there for a couple of years, in fact......... So, SHADAP as well.........

:flipoff2:

Bill, send "ZUK" a PM while you're at it. He's posted a thread on installing various brands of toy gears and lockers for his buddies in the Yota forum at least a dozen times. :)

Hey Bill, get any good responses from Randys on that BIG shim issue? It's been a long time since I set up Sami gears(1995) but I do remember using 1.3mm with Richmond gears......actually, they weren't Richmond....they were some crappy gear in a Richmond box. I've never heard of using 5mm though.
Now, in the case of YOTA chunks, I have used 6.1 mm shims when installing so-called 4 cylinder gears in a V6 housing.......but they don't count.
http://zukaz.tripod.com

The Randy´s rep said that it was "normal" to have up to a 1/4" shim under the pinion. I finished the setups using the shims that I had mentioned above. The paterns look good, so I´m going with it........

The chucks are almost ready to go in, I just need to tighten down the pinion nut to set the crush sleeves.

BTW, anyone done the crush sleeve thing after the diffs are in the truck, axles are mounted and tires are on the ground?!? I tried to do it with the third member locked in my bench vise, but became concerned about the survival of my vise. It takes a lot of torque to tighten that nut.......

I have laid a pipe wrench in the floor, set the yoke in the pipe wrench and used a breaker bar and 3-foot cheater bar to set the crush sleeve while someone else holds it all steady.

My impact wouldn't crush it.

Take a piece of angle iron thick enough to not worry about 3' long. Clamp it on the work bench,

drill 2 holes the distance of the driveshaft flange bolts, towards the end of the piece so that the flange is bolted to the angle iron. Have at it. Works great.