new4x4r Posted February 22, 2010 Share Posted February 22, 2010 (edited) Does anyone know how to figure out what gearing your truck has? Is there a code in the VIN or is it stamped on the rear diff. cover or something? I know pretty much nothing about gear ratios and whatnot. So any help would be great. Edited February 23, 2010 by new4x4r Link to comment Share on other sites More sharing options...
JUDGE Posted February 22, 2010 Share Posted February 22, 2010 Does anyone know how to figure out what gearing your truck has? Is there a code in the VIN or is it stamped on the rear diff. cover or something? I know pretty much nothing about gear ratios and whatnot. So any help would be great. There's an info plate inside the engine bay, on the passanger side I believe, that has your gear ratio etc. Link to comment Share on other sites More sharing options...
shift220 Posted February 22, 2010 Share Posted February 22, 2010 If you have it up in the air already just rotate a wheel 360 degrees and count the number of times that the driveshaft rotates (front is probably easiest). # driveshaft rotations / # wheel rotations = gear ratio Link to comment Share on other sites More sharing options...
01silvapathy Posted February 22, 2010 Share Posted February 22, 2010 You've already ordered 35's there is NO turning back homebro Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 Does anyone know how to figure out what gearing your truck has? Is there a code in the VIN or is it stamped on the rear diff. cover or something? I know pretty much nothing about gear ratios and whatnot. So any help would be great. 4.36 http://www.driverside.com/specs/nissan-pathfinder-1998-2513-5503-0 Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 Steve! Where do you find all this good stuff!? So should I be looking into getting the 4.6? Link to comment Share on other sites More sharing options...
01silvapathy Posted February 23, 2010 Share Posted February 23, 2010 haha, 4.3's with the 3.3 and 35x12.5's this shall be interesting Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 Steve! Where do you find all this good stuff!? So should I be looking into getting the 4.6? I say going from 4.3 to 4.6 is a waste of money considering you are going with 35"... If you do not want to break everything, you could really considering this : https://www.4x4parts.com/catalog/product_info.php?cPath=165_494&products_id=4076 .. This will bring your TC ratio from 2:1 to 3.7:1.... This will greatly help your 3.3 .. Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 so if I went with the new reduction gears is there a Pinion and Ring gear I should swap into the rear end? or are those not a option for the R50? Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 (edited) so if I went with the new reduction gears is there a Pinion and Ring gear I should swap into the rear end? or are those not a option for the R50? The reduction gears are gears you change within the transfer case, and you keep your existing 4.36 in your diff. There is also a new set of gears ratio availale at ruggedrocks. You can choose from 4.8 up to 5.8. The vad thing of this is that your high gear will also suffer from it and the price is basically the same. http://ruggedrocksoffroad.com/pathfinder-differential-gears-c-38_854.html . Not to mention that if you do not know how to adjust the gear lash and setup a diff properly you will need some help from someone that knows... usually money will be involved for the install so that your gears last a long time. Changing the gears in your tc is just a matter of changing parts. There is no adjustements to be done and only your low range will be changed, which is what is important on the trail.. going from 2:1 to 3.7:1 is like going from your 4.36 to 8.08 . So in my opinion you get the best of both world.. Edited February 23, 2010 by fleurys Link to comment Share on other sites More sharing options...
01silvapathy Posted February 23, 2010 Share Posted February 23, 2010 Imo change your r/p in your thrid members. If you want to do it cheaper than those new gears you can look around for some Xterra 4.9 gears. Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 Imo change your r/p in your thrid members. If you want to do it cheaper than those new gears you can look around for some Xterra 4.9 gears. If i'm not mistaken, the xterra have the r180 in front not the r200 like the path... Link to comment Share on other sites More sharing options...
tekazgtr1984 Posted February 23, 2010 Share Posted February 23, 2010 The R50 for 1998 came with 2 gearing options: 4.363:1 or 4.636:1. You can check by looking at your VIN plate in the engine bay. It should read HGXX for the gears. Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 awesome! Thanks for all the info guys.. I'm starting to learn some stuff about the gearing side of things :-D I'll check the VIN right now. Link to comment Share on other sites More sharing options...
tmorgan4 Posted February 23, 2010 Share Posted February 23, 2010 Unfortunately the 4.9 Xterra gears and the other 5.XX ratios won't work for the R50 front diffs. It will work in the rear, but not the front. Highest that is available for the front is the factory (in some cases) 4.636 gears. Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 Unfortunately the 4.9 Xterra gears and the other 5.XX ratios won't work for the R50 front diffs. It will work in the rear, but not the front. Highest that is available for the front is the factory (in some cases) 4.636 gears. Why do steevo at rugged rocks list them has being compatible for r200 up to 2004 pathfinder ?? maybe someone could ask him...? http://ruggedrocksoffroad.com/pathfinder-differential-gears-c-38_854.html Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 I've tried running my VIN on the decoder sites and using the self decoder... Nothing comes up for the gearing of that model. Its just where it was build and what engine it has, stuff like that. I don't have and HG numbers or anything in my Numbers either. IF I were to have (or got them if I don't) the 4.636:1 gears and got the reduction gears for my TC. You guys think I would be ok with the 35's? That is if they fit... hahaha Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 (edited) I've tried running my VIN on the decoder sites and using the self decoder... Nothing comes up for the gearing of that model. Its just where it was build and what engine it has, stuff like that. I don't have and HG numbers or anything in my Numbers either. IF I were to have (or got them if I don't) the 4.636:1 gears and got the reduction gears for my TC. You guys think I would be ok with the 35's? That is if they fit... hahaha I think if you get both the 4.6 gears AND the TC gears, you would have one hell of a crawler here...little calculation : (first gear(2.79) * TC ratio(3.7) * gear Ratio(4.636) * 2 (auto trans)) = crawling ratio of : 95.71 Considering a rubicon has a 73:1 ratio with the 4:1 TC and 4.10 gears, I say yours will go up just fine !! :-) the beauty of this is that you will be able to go easy on the fun pedal when crawling and save your rig... Sometime i whish I had the tx10 for the TC. I have been searching a way to change the ratio for my atx14a and it's not going to be easy. Since it uses a completely different system (sun gear and planetary like an auto trans), the modification is quite a bit more touchy than yours... I say this is (TC gears) a well invested 1000 bucks. I know I would if I could.. by the way, try to be ready for the end of may... I'm shooting to get some of you guys in here for a 2 days crawling fest...:-) stay tuned... Edited February 23, 2010 by fleurys Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 Awesome! Thats what I'll look forward to doing... Now I just need someone named Steve to "lend" me his Locker ;-) Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 (edited) Awesome! Thats what I'll look forward to doing... Now I just need someone named Steve to "lend" me his Locker ;-) Sure anything for you rod...which one you want ...I got 2 now you know ... ;-) Edited February 23, 2010 by fleurys Link to comment Share on other sites More sharing options...
new4x4r Posted February 23, 2010 Author Share Posted February 23, 2010 Really? Front and Rear? Link to comment Share on other sites More sharing options...
fleurys Posted February 23, 2010 Share Posted February 23, 2010 (edited) Really? Front and Rear? looks like it .. I have a new switch in my dash.. some pics here... http://s435.photobucket.com/albums/qq71/steve_fleury3/front-locker-bushings-shocks/?start=0 now I'm working on a new unbreakable half-shaft setup because I know it's coming... Edited February 23, 2010 by fleurys Link to comment Share on other sites More sharing options...
exit34rocker1017 Posted February 24, 2010 Share Posted February 24, 2010 would you guys be able to tell me if its okay running 33's AFTER i attempt a SFD, if i have 4.6 gears? i have a 1999.5 LE. what about 35's also? Link to comment Share on other sites More sharing options...
02silverpathy Posted February 25, 2010 Share Posted February 25, 2010 As a daily driver the 4.636 gear upgrade is totally worth it. I am sure with the 3.3 that you will greatly appreciate the gear swap, I did and I have the VQ. I had JWT cams in my 98, with exhaust and an open air filter...it ran strong, but I can only dream of what that gear swap would have done. Oddly enough it was an XE with some oem upgrades like power windows and locks as well as an LSD 4.36 Link to comment Share on other sites More sharing options...
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