Topic: Revolution Gear & Axle

[Jeffy]

So, I did a little research on who they are.  Turns out the company was started by the former VP or Superior Gear and Axle.  Their axles are actually made at the same foundry Foote Axle and Forge where Superior axles were made.

I read that they're gears are made at the same Korean foundry as Yukon Gears's but are made to their specs.  From what I gather, they are polished and lapped twice.

They are also the only company to make 5.13:1 gears for YJ/TJ's which is the big news.  I haven't seen the gears in any of the big names like 4WDH or Q-Tec. yet though.  A few sites who are official reseller's does have them though.

It's a little confusing in that they show TJ listed under High-Pinion/Reverse Rotation which they aren't.

XJ/YJ High Pinion 30

https://www.4lowparts.com/shop/axles-and-gears/ring-pinion-dana-30-high-pinion-gear-set-jeep-tj-lj-xj/
http://www.gotshocker.com/product.php?productid=25887
http://stores.dmrtransmission.com/revolution-gear-dana-30-reverse-5-13-ring-and-pinion/
http://www.gotshocker.com/product.php?productid=25887

XJ/TJ Low Pinion 30

https://www.4lowparts.com/shop/axles-and-gears/revolution-ring-pinion-dana-30s-short-pinion-jeep-tj-lj/
http://www.gotshocker.com/product.php?productid=25888
http://stores.dmrtransmission.com/revolution-gear-dana-30-short-5-13-ring-and-pinion/
http://www.gotshocker.com/product.php?productid=25888

Very tempting to try them out.  Though I don't have the means to install them at home anymore.

I'm also confused about their D44 shafts which they list for TJ's and XJ's.  Problem is they are in fact the same shafts but the retainer is different.  XJ's use standard D44 retainers and bearings while TJ's use smaller D35 retainers.  Might have to email them and ask about it.  While most other places will sell you the kits unassembled, Superior and now Revolution sells them ready to go which was always nice.

[jfrabat]

I just installed mine yesterday.  Difference is certainly felt, and I now have 5th gear again.  Not a HUGE difference, but certainly noticeable!  I did notice that with the 4.88, 3 tooths actually make contact at all times, while on this one, 2 tooths make contact (2.5 if you will!).  Could be an issue with lockers and chains.  Time will tell, I guess...

[Jeffy]

I just installed mine yesterday.  Difference is certainly felt, and I now have 5th gear again.  Not a HUGE difference, but certainly noticeable!  I did notice that with the 4.88, 3 tooths actually make contact at all times, while on this one, 2 tooths make contact (2.5 if you will!).  Could be an issue with lockers and chains.  Time will tell, I guess...

I don't think it will be an issue.  It's common for certain gear ratios not to have all the teeth contact at all times.  I'm certain that it's calculated in the strength of the gears. I'm tempted to try them though if other things come into play it might be moot which is why I've been holding off.

If I had 4.88's I'm not sure if I'd bother.  With my 4.56's it's not bad with 33's and I'm sure I'd like 5.13's but the difference between 4.88's and 5.13's is marginal.

[jfrabat]

With my 4.56's it's not bad with 33's and I'm sure I'd like 5.13's but the difference between 4.88's and 5.13's is marginal.

Marginal, but it is felt.  When I was coming back from my wheeling trip, there is a mountain called Zurqui that I would always have to drop to 2nd to climb, and now I could maintain speed in 3rd uphill.  Also, the crawl ratio is improved in a noticeable way.  I can now do certain opstables in 2nd L instead of 1st L.

[neale_rs]

Sounds good.  If I went to 35s this would be a must do.

[jfrabat]

Sounds good.  If I went to 35s this would be a must do.

A buddy of mine is installing his on his rig, and he has almost the same setup as me but runs 35s.  I will let you know how he feels it, but with 4.88, the two jeeps ran almost the same (and the real difference in tire size was really 1", not 2")

[sharpxmen]

how much $ was for each set? (excluding installation & shipping/duty/etc).

[jfrabat]

how much $ was for each set? (excluding installation & shipping/duty/etc).

About $170 or so