So I pulled my rear pumpkin out, swapped in a quaife LSD, dropped the pumpkin at my local shop to set lash and mesh. Picked it up today and they
|
|
LinkBack | Thread Tools | Display Modes |
01-22-2018, 03:21 PM | #1 (permalink) |
Base Member
Join Date: Nov 2017
Location: Wisconsin
Posts: 38
Drives: 2017 370z
Rep Power: 59 |
Differential lash question.
So I pulled my rear pumpkin out, swapped in a quaife LSD, dropped the pumpkin at my local shop to set lash and mesh. Picked it up today and they told me that the tightest he could get it was .009 without messing up the gear mesh. Should I be concerned, is it going to make noise being out of spec. Dont have time to install it until the end of the week.
Thanks |
01-22-2018, 07:52 PM | #2 (permalink) |
Track Member
Join Date: Oct 2016
Location: OKC
Posts: 785
Drives: 2010 touring
Rep Power: 7842 |
Well I set mine at .006” with used 3.69 gears. Thats max for the factory spec.
I thought that might be possibly a little loose and be noisey. I called my buddy at the race shop and he said the pinion depth is more of a contributer to noise than backlash is. He said to set it up with the best contact pattern, and dont sweat the backlash number, which is what I did. I havent installed it yet, so we will see.. |
01-22-2018, 11:57 PM | #3 (permalink) |
Ronin Samurai - Assassin
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,180
Drives: 2011 Nismo GM 6M
Rep Power: 2684437 |
I'm going to be pulling my out soon for the OS Giken. So I'm interested in this.
__________________
浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html |
01-23-2018, 10:13 AM | #4 (permalink) |
Track Member
Join Date: Aug 2011
Location: CA
Posts: 972
Drives: slower than before
Rep Power: 387 |
Put some of that marking grease on it and look at the pattern. It will tell you if you need to mess with it. Study up... I don't think it's an easy task to get it right. That's why most shops won't mess with it.
__________________
|RIP|6spd-sport|OSG-LSD|XP8|RBF600|Eibach Sways|RE-71R|FI-34Row|Gen3-CAI|Yaw P.S.| |
01-23-2018, 10:15 AM | #5 (permalink) |
Track Member
Join Date: Aug 2011
Location: CA
Posts: 972
Drives: slower than before
Rep Power: 387 |
My OS Giken went in perfect without needing to mess with the shims. I don't recall anyone needing to mess with the shims as long as they didn't change the gears.
__________________
|RIP|6spd-sport|OSG-LSD|XP8|RBF600|Eibach Sways|RE-71R|FI-34Row|Gen3-CAI|Yaw P.S.| |
05-09-2018, 08:16 PM | #6 (permalink) | |
Track Member
Join Date: Oct 2016
Location: OKC
Posts: 785
Drives: 2010 touring
Rep Power: 7842 |
Quote:
So nothing wrong with .006" backlash. |
|
05-09-2018, 09:44 PM | #7 (permalink) |
Ronin Samurai - Assassin
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,180
Drives: 2011 Nismo GM 6M
Rep Power: 2684437 |
Before installing the OS Giken. .0025" backlash.
After installing the OS Giken. '0025" backlash. eastwest's was .0035" when I did his Z1 diff cover and SPL diff bushings. Both ours patterns for drive and coast was good. Right in the middle. Mine doesn't make any noises that I can hear.
__________________
浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html |
05-10-2018, 12:01 AM | #8 (permalink) |
Track Member
Join Date: Oct 2016
Location: OKC
Posts: 785
Drives: 2010 touring
Rep Power: 7842 |
Whats interesting is my original diff was a little noisy on coast when I pulled it out with only 32K original miles on it.
The spare one I built and just swaped in with used gears, is super quiet. Gear mileage unknown... |
06-15-2022, 05:07 AM | #9 (permalink) |
Track Member
Join Date: May 2021
Location: slovenia
Posts: 556
Drives: 370z pack
Rep Power: 125427 |
I hope it's not a problem to raise this topic. I have finally gotten delivery of my OS Giken LSD which I'm planning to install this weekend. When I spoke to the sales rep, he assured me that the LSD is manufactured with such precision that he thinks it's not necessary to go and buy different shims for additional adjustment.
From what I understand, if I just pull out the visco LSD, replace the flange and add the OS Giken LSD - there is still a fair chance that the backlash will not be the same as factory, regardless of how well I install it. So my concerns boil down to the following: -contact between the teeth is critical, and this I understand is the main point to adhere to. -backlash may differ and it will not necessarily ruin the diff if it's off by a few 1 thousands...Or will it? -should I postpone LSD installation until I get a load of shims - just in case? I also thought to measure backlash on stock visco LSD, before I remove it - just to check what is the factory setting, and maybe aim for that. Thank you for any opinions and advice. Last edited by filip00; 06-15-2022 at 01:27 PM. |
06-17-2022, 07:01 AM | #11 (permalink) |
Enthusiast Member
Join Date: Dec 2010
Location: new jersey
Posts: 452
Drives: 2011 MB 370Z NISMO
Rep Power: 1245 |
I also installed my osgiken diff without any added shims. As long the gear mesh looks good you should be fine. I would think you’d run into problems if you would be swapping out the final drive gear ratio. Just make sure you have new seals and new side bearings
|
06-17-2022, 08:06 AM | #12 (permalink) | |
Track Member
Join Date: May 2021
Location: slovenia
Posts: 556
Drives: 370z pack
Rep Power: 125427 |
Quote:
I'm not changing the final drive as I like the current setup. New seals are in the whole package. Also - I got 3 liters of oil in the package, I'm guessing it's enough for 2 tanks? I.e. one for the break in for the first 300 miles or so, and then I swap the oil? Or is it not needed to break it in? |
|
06-17-2022, 08:21 AM | #13 (permalink) |
Enthusiast Member
Join Date: Dec 2010
Location: new jersey
Posts: 452
Drives: 2011 MB 370Z NISMO
Rep Power: 1245 |
Yes I did measure the backlash just to make sure its not crazy out of spec. It has been years ago but I'm positive it was somewhat close to spec. Make sure you get ring gear marking paint as well to check the mesh. 3 liters for 2 fill ups might be slightly short but I also have higher capacity cover. You will know after first fill up whether will need more or not. I assume you got the osgiken diff fluid?
|
Bookmarks |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Quaife differential install question | DEpointfive0 | Engine & Drivetrain | 8 | 06-12-2022 10:23 AM |
Quaife differential install question | DEpointfive0 | Nissan 370Z General Discussions | 7 | 09-16-2015 02:46 PM |
Differential flange question (Stub shaft) | chrischhorn | Engine & Drivetrain | 5 | 04-10-2013 08:34 PM |
Rear Differential Question | jpit | Engine & Drivetrain | 8 | 12-23-2011 09:57 AM |
Base 370z Differential Question | PRSMESA24 | Engine & Drivetrain | 20 | 06-06-2009 09:33 PM |