Calmini Gears
By Kev on Feb 16, 2008 | In Drive Train

Why not get low.. 3.92:1 low.
Follow up:
First off I did not reuse the stock Tcase. I had one that was pulled from an early 90s Pathfinder. WHY??? Well the chain in the Xterra Tcase is not as strong as the Pathfinder Tcase. Basically the Chain in the Pathfinder Tcase is 3/4" wider than the Xterra Tcase. It bolts right in you just need to change out all 3 sensors on the Passenger side of the case.

High Points
WOW... I really think that this mod is NOT talked about enough. The amount of control it gives you is awesome. The power is by far a huge improvement over stock as well.
* The gearing!!!!
* Control is much better when crawling up & down everything.
* The ability to just nearly idle up things is great.
* Much less momentum is needed to get up things since you can allow your tires to spin really slow to grip the terrain instead of spin off.
* Much easier on the whole drive train by not needing to generate the momentum.
* Much easier on the Transmission and Engine, you can feel it not needing to work as hard.
Negatives
* Needing to grind down portions on the inside of the Tcase.
* The new gearing is a little too low for flatter portions of the trail, but honestly that does not bug me.
* The new gearing is so different you will have to RELEARN how to drive it. It changes it that much!!
* Using a Pathfinder Tcase you have make a linkage between the Tcase and shifter.
Would I buy them again?
Yep and I would do it much sooner than I did now that I know.
From The Calmini Site
100% MACHINED BILLET - MADE PROUDLY IN THE USA
Finally, a true ROCKCRAWLER transfer case gear set for for the Nissan Xterra 4x4! Our gear set is manufactured in the USA from SAE 8620 alloy bar stock material. For long wear life and operation at high speeds nothing else is acceptable. This gearset provides a final low range reduction of 3.92:1, which is a whopping 93.86% lower than stock! It completely transforms this vehicle's off road crawl capability and enables it to perform much better in heavy off-road use situations. This gearset will fit all Nissan TX-10 transfer cases available in all Nissans worldwide. The complete gearset comes with precision machined counter-gear, input gear, and output gear, billet machine retainer ring and bearing as well as two(2) quarts of Valvoline 80W90 gear oil and Permatex RTV silicone gasket maker.
Download Install Installation Instructions here -15.8meg
Company Info
Calmini Products, Inc.
6951 McDivitt Drive
Bakersfield, CA 93313
800-345-3305
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