Help - Quaife QDF11L Install

rhd · 02-27-2013, 12:43 PM

2010 370Z Base, 6speed MT - Quaife QDF11L Install - See below

rhd · 02-27-2013, 05:13 PM

See below

AdamRacer · 02-27-2013, 10:52 PM

Wow that does not sound good and im also thinking about installing a Quaife diff in my open differential that I have now. Id like to know what you find out before I order my quaife.

rhd · 02-27-2013, 10:56 PM

I am calling them in 4 hrs - 8am UK time.

rhd · 02-28-2013, 01:08 PM

We screwed up, today we precisely took measurements. It turns out the Quaife is 5.034” at D-2, my ring gear ID measured 5.040”, that is where the difference lies. I jumped the gun and thought the Quaife was out of spec, should have known better, my work has taught me over and over to be absolutely positive before reporting. Some days I am really dumb.

I talked with Quaife and told them our mistake and it is the ring gear and not a machining dimension error. Sorry for any mis-information I have published, definitely my mistake. I know where the problem is now.

I called Forged Performance and Kelly said there should not be any slop between the Quaife and the ring gear; he is looking for a replacement ring gear for me. The replacement ring gear inside diameter needs to be 5.034” to 5.032”, I still wonder if others have experienced this issue.

If you have a good stock ring gear that meets an inside diameter of 5.034” to 5.032” please let me know.

Man this is frustrating to say the least, I plan on boosting this car so I want everything to be just right in regards to drive train components. I have no idea why this OEM ring gear is larger, if it were overheated (bought the car with 3K miles) you would think there would be slop in the OEM diff but there is not, it is tight as a drum.

I’ll be dining on crow the next few days.

John - Montana

Rusty · 02-28-2013, 04:27 PM

You also neeed the pinion too. It's a matched set.

02-27-2013, 12:43 PM	#1 (permalink)
rhd Enthusiast Member Join Date: Feb 2012 Location: In the shop Posts: 281 Drives: Women Crazy Rep Power: 13	Help - Quaife QDF11L Install 2010 370Z Base, 6speed MT - Quaife QDF11L Install - See below Last edited by rhd; 02-28-2013 at 01:09 PM.

02-27-2013, 05:13 PM	#2 (permalink)
rhd Enthusiast Member Join Date: Feb 2012 Location: In the shop Posts: 281 Drives: Women Crazy Rep Power: 13	See below Last edited by rhd; 03-01-2013 at 07:08 PM.

02-27-2013, 10:56 PM	#4 (permalink)
rhd Enthusiast Member Join Date: Feb 2012 Location: In the shop Posts: 281 Drives: Women Crazy Rep Power: 13	I am calling them in 4 hrs - 8am UK time. Last edited by rhd; 03-01-2013 at 07:09 PM.

02-28-2013, 04:27 PM	#6 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,217 Drives: 2011 Nismo GM 6M Rep Power: 2684438	You also neeed the pinion too. It's a matched set. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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02-27-2013, 10:52 PM	#3 (permalink)
AdamRacer Enthusiast Member Join Date: Jan 2012 Location: North Florida Posts: 316 Drives: '12 MBlue 370z 6sp Rep Power: 13	Wow that does not sound good and im also thinking about installing a Quaife diff in my open differential that I have now. Id like to know what you find out before I order my quaife.

02-28-2013, 01:08 PM	#5 (permalink)
rhd Enthusiast Member Join Date: Feb 2012 Location: In the shop Posts: 281 Drives: Women Crazy Rep Power: 13	We screwed up, today we precisely took measurements. It turns out the Quaife is 5.034” at D-2, my ring gear ID measured 5.040”, that is where the difference lies. I jumped the gun and thought the Quaife was out of spec, should have known better, my work has taught me over and over to be absolutely positive before reporting. Some days I am really dumb. I talked with Quaife and told them our mistake and it is the ring gear and not a machining dimension error. Sorry for any mis-information I have published, definitely my mistake. I know where the problem is now. I called Forged Performance and Kelly said there should not be any slop between the Quaife and the ring gear; he is looking for a replacement ring gear for me. The replacement ring gear inside diameter needs to be 5.034” to 5.032”, I still wonder if others have experienced this issue. If you have a good stock ring gear that meets an inside diameter of 5.034” to 5.032” please let me know. Man this is frustrating to say the least, I plan on boosting this car so I want everything to be just right in regards to drive train components. I have no idea why this OEM ring gear is larger, if it were overheated (bought the car with 3K miles) you would think there would be slop in the OEM diff but there is not, it is tight as a drum. I’ll be dining on crow the next few days. John - Montana