is my diff toast? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

2.5T_/<ouki · 10-03-2019, 11:03 PM

97’ Q45 diff. It doesn’t have in/out or side to side play, however there seems to be some “play” almost as if it turns a quarter of an inch before it engages with the ring gear and you can clearly hear it from the video.

Story: I had shimmed the diff and literally had a HELL OF A TIME trying to get everything back in the housing with the races and spacers. It almost feels like it’s not in ALL the way however I am unable to seat it any further.

Would my symptoms be caused from it not being properly seated in all the way? Would a crushed adjustment spaced cause this?

Thanks

https://youtu.be/1OT1jgrXD0E

Krusty_s13 · 10-04-2019, 07:53 AM

Quote:

Originally Posted by 2.5T_/<ouki

97’ Q45 diff. It doesn’t have in/out or side to side play, however there seems to be some “play” almost as if it turns a quarter of an inch before it engages with the ring gear and you can clearly hear it from the video.

Story: I had shimmed the diff and literally had a HELL OF A TIME trying to get everything back in the housing with the races and spacers. It almost feels like it’s not in ALL the way however I am unable to seat it any further.

Would my symptoms be caused from it not being properly seated in all the way? Would a crushed adjustment spaced cause this?

Thanks

https://youtu.be/1OT1jgrXD0E

Were you able to get the caps back in and torqued to spec?
If the diff isnt seated properly, the ring gear wont engage the pinion correctly. Grab some gear marking compound, put it on the ring gear and spin it from the pinion end. Look at the tooth engagement and compare it to the FSM. Should tell you whats wrong.

jedi03 · 10-04-2019, 08:29 AM

sounds like shims were not put back correctly...

eagleeyes221 · 10-04-2019, 08:34 AM

check your back lash by using a dial indicator and a magnetic mount. +1 on also checking your engagement with marking compound

S14rebuild · 10-04-2019, 10:08 AM

Quote:

Originally Posted by eagleeyes221

check your back lash by using a dial indicator and a magnetic mount. +1 on also checking your engagement with marking compound

Only way to know 100% sure

2.5T_/<ouki · 10-04-2019, 11:57 AM

Quote:

Originally Posted by Krusty_s13

Were you able to get the caps back in and torqued to spec?
If the diff isnt seated properly, the ring gear wont engage the pinion correctly. Grab some gear marking compound, put it on the ring gear and spin it from the pinion end. Look at the tooth engagement and compare it to the FSM. Should tell you whats wrong.

Tbh, i haven’t torqued the caps back in all the way to spec so I’m guessing it’s not seated all the way in? Honestly I had a hell of a time and truly the only way I was able to get it seated as far as I did, was to drop the nose on the ground and let gravity do the trick LOL!

Just didn’t want to tighten the caps if I had to pull it out again. I’ll torque then and check thanks!

2.5T_/<ouki · 10-04-2019, 11:58 AM

Quote:

Originally Posted by jedi03

sounds like shims were not put back correctly...

I literally had a HELL OF A TIME getting everything in. Shins are in correct spots and correct sides, just feels it’s not seared properly.

S14rebuild · 10-04-2019, 12:24 PM

Well if the caps are on, n bolts torqued then its in all the way, like stated before, check backlash n mesh pattern and ull know 100%

2.5T_/<ouki · 10-04-2019, 03:12 PM

Thanks guys, got everything torqued and still having this play so I’ll check backlash. Appreciate all the responses.

DJTTon · 10-11-2019, 10:51 AM

Following this, I have a similar issue with an R200 VLSD in my zenki. I believe the shims are all stock from both sides, but the play internally is what youre describing. Keep this thread updated with info on the backlash. Except mines worse and its more like an 1/8th of a turn lol

eagleeyes221 · 10-14-2019, 08:37 AM

Quote:

Originally Posted by 2.5T_/<ouki

Honestly I had a hell of a time and truly the only way I was able to get it seated as far as I did, was to drop the nose on the ground and let gravity do the trick LOL!

This made me cringe a little bit. i was recently taught a trick for installing those shims while i did the carrier in my differential. Use a 5 gallon bucket to hold the differential upright, as you're tapping in the shims rotate the gears to evenly preload the bearings. Everything should seat properly and will be a hell of a lot easier this way. After that just torque the caps down and then get your engagement pattern with grease.

joshg51 · 10-15-2019, 05:19 PM

damn, its 2019 and people still playing with old trash VLSDs

S14rebuild · 10-15-2019, 05:48 PM

^Dam, Its 2019 and this guy finally made hiss 167 post since 2012. CONGRATS

joshg51 · 10-15-2019, 06:21 PM

Quote:

Originally Posted by S14rebuild

^Dam, Its 2019 and this guy finally made hiss 167 post since 2012. CONGRATS

thanks florida, quality not quantity is what i say.

On the real tho, shimming VLSDs are a great way to put more metal in your fluid and overload the side bearings squeezing it back in the pumpkin. I didnt even waste my time with the one that came in my car. Just weld it or get a real LSD.

S14rebuild · 10-15-2019, 06:23 PM

Quote:

Originally Posted by joshg51

thanks florida, quality not quantity is what i say.

On the real tho, shimming VLSDs are a great way to put more metal in your fluid and overload the side bearings squeezing it back in the pumpkin. I didnt even waste my time with the one that came in my car. Just weld it or get a real LSD.

Yup...lots of quality

jedi03 · 10-16-2019, 09:54 AM

how does that put more in? if the spacing is setup correctly it should operate the same as any other locking diff...the multi clutch diffs would be more prone to putting "more metal in your fluid" but again if setup properly should be able to function perfectly fine without wearing out abnormally fast...also don't recommend welded...hit a corner in some rain and prepare for some fun lol!

10-03-2019, 11:03 PM	#1
2.5T_/<ouki Zilvia FREAK! Join Date: Oct 2011 Location: SoCal Posts: 1,150 Trader Rating: (13) Feedback Score: 13 reviews	is my diff toast? 97’ Q45 diff. It doesn’t have in/out or side to side play, however there seems to be some “play” almost as if it turns a quarter of an inch before it engages with the ring gear and you can clearly hear it from the video. Story: I had shimmed the diff and literally had a HELL OF A TIME trying to get everything back in the housing with the races and spacers. It almost feels like it’s not in ALL the way however I am unable to seat it any further. Would my symptoms be caused from it not being properly seated in all the way? Would a crushed adjustment spaced cause this? Thanks https://youtu.be/1OT1jgrXD0E

10-11-2019, 10:51 AM	#10
DJTTon Zilvia Addict Join Date: Nov 2015 Location: Where the bad guys are Posts: 886 Trader Rating: (6) Feedback Score: 6 reviews	Following this, I have a similar issue with an R200 VLSD in my zenki. I believe the shims are all stock from both sides, but the play internally is what youre describing. Keep this thread updated with info on the backlash. Except mines worse and its more like an 1/8th of a turn lol __________________ Skurr Skurr

10-15-2019, 05:19 PM	#12
joshg51 Zilvia Member Join Date: May 2012 Location: DC, CA Posts: 171 Trader Rating: (1) Feedback Score: 1 reviews	damn, its 2019 and people still playing with old trash VLSDs __________________ Ayo that's crazy @originaldonjosh

10-04-2019, 08:29 AM	#3
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,842 Trader Rating: (8) Feedback Score: 8 reviews	sounds like shims were not put back correctly...

10-04-2019, 08:34 AM	#4
eagleeyes221 Leaky Injector Join Date: Jan 2013 Location: connecticut Age: 34 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	check your back lash by using a dial indicator and a magnetic mount. +1 on also checking your engagement with marking compound

10-04-2019, 12:24 PM	#8
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Well if the caps are on, n bolts torqued then its in all the way, like stated before, check backlash n mesh pattern and ull know 100%

10-04-2019, 03:12 PM	#9
2.5T_/<ouki Zilvia FREAK! Join Date: Oct 2011 Location: SoCal Posts: 1,150 Trader Rating: (13) Feedback Score: 13 reviews	Thanks guys, got everything torqued and still having this play so I’ll check backlash. Appreciate all the responses.

10-15-2019, 05:48 PM	#13
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	^Dam, Its 2019 and this guy finally made hiss 167 post since 2012. CONGRATS

10-16-2019, 09:54 AM	#16
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,842 Trader Rating: (8) Feedback Score: 8 reviews	how does that put more in? if the spacing is setup correctly it should operate the same as any other locking diff...the multi clutch diffs would be more prone to putting "more metal in your fluid" but again if setup properly should be able to function perfectly fine without wearing out abnormally fast...also don't recommend welded...hit a corner in some rain and prepare for some fun lol!