ring and pinion differential mod for final drive power increase

3011 Views 5 Replies 3 Participants Last post by poruja, Dec 28, 2012

poruja

Discussion Starter · Aug 22, 2012

ring and pinion differential mod for final drive power increase

Sorry folks. I have searched for "ring and pinion", "final drive" and differential, but have not found much info, so I'm starting a new thread with some questions.-

1 I live in mountainous Honduras and need uphill passing power for my 2002 SE 4WD 3.3L that is loaded with family, dogs, support equipment, recovery equipment, and an overweight front bumper. Is there a nismo 5.1 ring and pinion set that will help me with this? I rarely exceed 65 mph.

2 Has anyone done a ring and pinion mod to increase pulling/towing power? What are the results? Worth the money?

3 What is the highest quality ring and pinion set to get? (what manufacturer?)

4 Will a ring and pinion mod increase fuel efficiency or reduce engine/transmission wear? It seems like more rpm's would reduce fuel efficiency.

Thank you all so much for your help.

Save

1 - 6 of 6 Posts

RacerXXL

· #2 · Aug 22, 2012

What gearing do you have now?

Have people changed the ring and pinion to higher numerical gearing? Sure some have but generally most here are doing it to counter larger tires and gain back some of the useable power.

As far as I know there is only one manufacturer for Xterra gear sets and they can be found at AC. Yes, there is a 5.142 gear set available for the front and rear.

Another thread with some good information in it. http://www.clubxterra.org/forums/showthread.php?t=17154

Save

poruja

Discussion Starter · #3 · Aug 22, 2012

Good, bad, and ugly quote. Love it.

I have a 4.636 gear set currently.
I found the 5.1 set (part 38100-07J71) in a .pdf of parts from Nissan USA here.-
http://www.nissanusa.com/nismo-web/Nismo-Motorsports-Catalog-2010.pdf
I have contacted courtesyparts.com regarding this part, but have not yet heard back from them.
At the risk of using bad form, I'll post the link announcing the nismo part on xterra firma here.-
http://xterrafirma.com/forums/viewtopic.php?f=30&t=2127
Trying to find the ones that are produced by Nissan, and maybe cheaper than 4x4parts. Possible?

Save

RacerXXL

· #4 · Aug 23, 2012

I'm not sure the AC ones are not NISMO. The NISMO gear sets can be found at Rugged Rocks. http://ruggedrocksoffroad.com/nissan-xterra-ring-and-pinion-gears-by-nismo-2000-2004-rear-h233b-5143-p-5646.html

Save

M3C.CA

· #5 · Aug 23, 2012 (Edited)

I don't know how common Xterras are in Honduras or if the HG49 diffs (4.9 stock gear) was ever sold under an X there but I would recommend searching wreckers for a truck with stock 4.9 gears. You can tell the gear ratio by looking at the sticker on the inside of the driver door jamb, there will be an axle code of either HG46 (4.6) or HG49 (4.9). If you can find a pair you will get both thirds for a fraction of the cost of our over-priced retail gearsets and you won't need to pay for gear setup if you install the third in your own housing. 4.9 is enough of an improvement over 4.6 to be noticeable and the significant extra cost for the 5.1s is not worth it in my eyes. There were 5.38s for us available at some point but it was a limited run.

That's what I plan on doing at least...

Save

poruja

Discussion Starter · #6 · Dec 28, 2012

5.1's are coming in next week. Can't wait. Also some Warn hub lockers to get the drag off the front wheels. Power here we come!

Save

1 - 6 of 6 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month