Late to the party but it looks like you are getting it handled.
HP Dana 30 re-gear - pinion preload changed
- Thread starter Mike_in_Riga
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- dana 30 pinion pinion nut regear
Hello again, I would like to appeal to the wisdom of the community, and ask for a pattern check again again, this time on the rear axle.
Since the original post I have moved onto Dana 44 rear axle, and I think I am happy with this pattern, but when compared to the front axle, it feels like I got there too easy... hence the doubts.
Would appreciate input of the more experienced!
thanks! (low Pinion rear Dana 44)
Drive:
Coast:
Since the original post I have moved onto Dana 44 rear axle, and I think I am happy with this pattern, but when compared to the front axle, it feels like I got there too easy... hence the doubts.
Would appreciate input of the more experienced!
thanks! (low Pinion rear Dana 44)
Drive:
Coast:
That would certainly run but you might try .002 deeper and see if we can get it a littler further from the crown of the tooth on the drive side without going too deep
Sometimes you get that lucky! I think it looks great. MAYBE you could go 1 thou deeper but I wouldn't sweat it.
Perfecto. Appreciate it! This is a second run here, compared to ~15 on the front Axle. I guess sometimes you get lucky indeed..
Thank you both!
Thank you both!
UKTJ
TJ Addict
Actually, I almost forgot one more learned lesson, maybe will help you @UKTJ or someone else:
In short, the kit I had came with not enough pinion preload shims, so I ended up carefully filing down one of the shims from 12 thou (which was the thinnest one in the kit) to about 8 thou which was giving me the correct preload.
Slightly longer version:
Along with the two sets of Revolution Gears (Dana 30 and Dana 44), I ordered their master overhaul kits. That's where all the shims (aside from the ARB carrier shims that came in abundance of sizes with the lockers) came from. It felt like they could have added:
a) more quantities and sizes of pinion preload shims to both kits
b) more Dana 44 pinion depth shims (I had 5 shims in the kit, and by pure luck got a good pattern using 4 of them. Granted I have not used the thick baffle(?) shim that goes between pinion and the very first pressed bearing).
So with Dana 30 I ended up JUST hitting the required preload (next best combination was getting me over 20ftlb). With Dana 44, there was no chance of getting to the right preload using the shims in the kit - there were exactly 3 shims of 24 thou, and 3 shims of 12 though. After figuring out between which two thicknesses my desired preload lies, I clipped a sanding paper to a hard surface, 12 thou shim on top, and using a mixture of pneumatic sander and hand sanding carefully for some 2 hours got to 8 thou, which was sufficient to achieve the required rotational torque.
Lesson? I guess next time I will order a few extra pinion preload shims from a different kit, especially given they are interchangeable between Dana 30 and Dana 44.
In short, the kit I had came with not enough pinion preload shims, so I ended up carefully filing down one of the shims from 12 thou (which was the thinnest one in the kit) to about 8 thou which was giving me the correct preload.
Slightly longer version:
Along with the two sets of Revolution Gears (Dana 30 and Dana 44), I ordered their master overhaul kits. That's where all the shims (aside from the ARB carrier shims that came in abundance of sizes with the lockers) came from. It felt like they could have added:
a) more quantities and sizes of pinion preload shims to both kits
b) more Dana 44 pinion depth shims (I had 5 shims in the kit, and by pure luck got a good pattern using 4 of them. Granted I have not used the thick baffle(?) shim that goes between pinion and the very first pressed bearing).
So with Dana 30 I ended up JUST hitting the required preload (next best combination was getting me over 20ftlb). With Dana 44, there was no chance of getting to the right preload using the shims in the kit - there were exactly 3 shims of 24 thou, and 3 shims of 12 though. After figuring out between which two thicknesses my desired preload lies, I clipped a sanding paper to a hard surface, 12 thou shim on top, and using a mixture of pneumatic sander and hand sanding carefully for some 2 hours got to 8 thou, which was sufficient to achieve the required rotational torque.
Lesson? I guess next time I will order a few extra pinion preload shims from a different kit, especially given they are interchangeable between Dana 30 and Dana 44.
That is really a problem now days that these so called "Master Kits" are not including enough shims and small parts to ensure you can get the job done. I have done enough diff work over time that I have collected a fair amount of shims but not everyone has that luxury.
Exactly. I even mentioned that to RG&A a couple of years back. Frustrating when there are no 3 thou shims. Shops nowadays seen to get it close enough and call it good.
UKTJ
TJ Addict
For anybody finding this thread in future I just wanted to provide the info just given to me by Revolution when I called them. If you have a 2002 or earlier TJ you can use a gear package (Rev-YJ/XJ-Dana 44-410). But if your TJ is a 2003 or later then you need to order the Dana 30 reverse cut gears and the Dana 44 gears separately. The chap from Revolution described the 2003 onwards as needing the "TJ specific Dana 44 gears". I
I did not ask what the difference was as it was not relevant to me and I was on an expensive international call. Hopefully this may help somebody in the future if they are looking for this information.
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