I don't know if I am seeing this right but that looks like it's too deep on both sides but mostly in the first picture.
CK5
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2006 Rubicon Unlimited
- Thread starter TerryD
- Start date
Looks deep. How's the backlash? Do the pinion bearings feel tight? How much gear oil is in it?
The pinion bearings are pretty snug. Tighter than I would think after the miles I've put on it.
Backlash is good.
Backlash is good.
Does it make noise when it is cold also? I have had gears that howled because the gear oil gets slung so much almost none gets on the gears at speed as it all piles up against the diff cover and in the pinon bearings.
It's dangerous but I do it all the time... what happens when you put it up on jackstands?
Carrier bearings can make noise, but usually you never hear them except in a unibody car because usually you have to be going pretty fast for them to make noise.
It's dangerous but I do it all the time... what happens when you put it up on jackstands?
Carrier bearings can make noise, but usually you never hear them except in a unibody car because usually you have to be going pretty fast for them to make noise.
Cold is quieter but yes, it's there.
I'm gonna attempt to reset these better and see. Maybe I've wasted them. Maybe not. Worth a bit of time.
I'm gonna attempt to reset these better and see. Maybe I've wasted them. Maybe not. Worth a bit of time.
Pinion was way too tight.
I have made that mistake before and destroyed my bearing
I don’t usually chime in on gear patterns. But, Those patterns on the other page are too shallow.
I bought the pinion depth tool from summit. It’s annoying. But it helps. My pinion was .015” too shallow on my Jeeps Dana 44 with the stock depth shim.
I had to watch a YouTube video like 5 times to use the tool correctly with all the math. But it really helped not take shit apart 10 times.
All I’m saying is that pattern on the other page looks like the pinion is too far away to me and I double checked on the google machine pics as well.
Good luck either way.
I bought the pinion depth tool from summit. It’s annoying. But it helps. My pinion was .015” too shallow on my Jeeps Dana 44 with the stock depth shim.
I had to watch a YouTube video like 5 times to use the tool correctly with all the math. But it really helped not take shit apart 10 times.
All I’m saying is that pattern on the other page looks like the pinion is too far away to me and I double checked on the google machine pics as well.
Good luck either way.
I have the tool as well but the face of these pinions aren't machined flat. We attempted for an hour and a half to get any kind of repeatable reading from it.
What brand are the gears again?
I’ve had good luck with revolution gear and axle. They select gears from Korea. Which seem to be better. And the pinion is flat with the numbers engraved on the face.
I won’t run Yukon gears if possible anymore. Not after the last set I ordered. And just sent back. They use Chinese gears only now it seems. They used to get some of the circle k gears from Korea. I haven’t seen any in a long ass time from them though.
Must be the Korean factory gives the workers a lunch break. And makes their gears out of recycled Toyotas instead of recycled Hyundais. So they make better gears I guess.
I won’t run Yukon gears if possible anymore. Not after the last set I ordered. And just sent back. They use Chinese gears only now it seems. They used to get some of the circle k gears from Korea. I haven’t seen any in a long ass time from them though.
Must be the Korean factory gives the workers a lunch break. And makes their gears out of recycled Toyotas instead of recycled Hyundais. So they make better gears I guess.
These were "USA standard gear" brand.
You used ft/lbs instead of in/lbs?
No, was in a hurry and had a "it's close enough" moment. The pinion doing nearly 4k rpm at 70mph with these 5.13s and 33s didn't do me any favors either. LOL.
don't you have a 42RLE automatic in that Rubicon? 4th gear is .69; RPM is 2252.8.
That is engine RPM. The pinion is spinning that 0.31% FASTER than the engine which is the same as the engine RPM would be in 3rd which is 1:1.
I wondered if it was different and Google it before but couldn't find anything; then I found this formula that helped me.
engine RPM (2536)
transmission ratio .69
ring and pinion ratio 5.13
final drive ratio (.69 x 5.13) = 3.5397
2536 divided by 3.5397 = 716.44
so according to this the pinion RPM is 716.44; I could be wrong and I am trying to learn.
this is where I got the info:
like I said, just trying to learn. where did you come up with that the pinion was turning 31% faster?
engine RPM (2536)
transmission ratio .69
ring and pinion ratio 5.13
final drive ratio (.69 x 5.13) = 3.5397
2536 divided by 3.5397 = 716.44
so according to this the pinion RPM is 716.44; I could be wrong and I am trying to learn.
this is where I got the info:
Google Search
www.google.com
like I said, just trying to learn. where did you come up with that the pinion was turning 31% faster?
It's turning 31% faster than the crankshaft because the transmission is in overdrive so it turns the driveshaft faster than the crankshaft
So the engine inputs the RPM at 2536RPM to the transmission input shaft.
The transmission ratio is 0.69 which means the input shaft turns 0.69 times to every one revolution of the output shaft, which is turning at 3675rpm Since the transfer case is in high range which is 1:1, the input and output speeds are still 3675rpm which is also the speed of the driveshaft and the pinion.
The pinion then spins 5.13 times per every revolution of the axle shaft, dropping the axle shaft speed to 716 RPM.
The transmission ratio is 0.69 which means the input shaft turns 0.69 times to every one revolution of the output shaft, which is turning at 3675rpm Since the transfer case is in high range which is 1:1, the input and output speeds are still 3675rpm which is also the speed of the driveshaft and the pinion.
The pinion then spins 5.13 times per every revolution of the axle shaft, dropping the axle shaft speed to 716 RPM.
okay, that makes sense and I can see that (the lightbulbs are slowly getting lit, I am old so they are incandescent instead of LED)
