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Mfactory R200 LSD

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RebekahsZ    106

3 questions:

1)  Is this a helical LSD?

2)  Do we use the same shim stack as a standard R200 to locate the ring gear/carrier combination within the case (and to establish the proper relationship to the pinion gear)?

3)  Do you have a source for shims?

Edited by RebekahsZ

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3 questions:

1)  Is this a helical LSD?

2)  Do we use the same shim stack as a standard R200 to locate the ring gear/carrier combination within the case (and to establish the proper relationship to the pinion gear)?

3)  Do you have a source for shims?

 

1) Yes

 

2) Yes but in my case the existing shims are too thick so I have some thinner ones on order

 

3) http://www.nissanpartsdeal.com/parts-list/1990-nissan-240sx/rear-final-drive.html?Diagram=380_A02

you can take these part numbers and just Google them, there's a lot of places that sell them since the r200 is in a lot of vehicles.

 

Available side bearing Adjusting Shims   ( Carrier Bearing Shims )
 
2.00 ( 0.0787 )                                                38453- N3100
2.05 ( 0.0807 )                                                38453- N3101
2.10 ( 0.0827 )                                                38453- N3102
2.15 ( 0.0846 )                                                38453- N3103
2.20 ( 0.0866 )                                                38453- N3104
2.25 ( 0.0886 )                                                38453- N3105
2.30 ( 0.0906 )                                                38453- N3106
2.35 ( 0.0925 )                                                38453- N3107
2.40 ( 0.0945 )                                                38453- N3108
2.45 ( 0.0965 )                                                38453- N3109
2.50 ( 0.0984 )                                                38453- N3110
2.55 ( 0.1004 )                                                38453- N3111
2.60 ( 0.1024 )                                                38453- N3112
2.65 ( 0.1043 )                                                38453- N3113
 
Torque Specifications
 
Ring Gear           98-112 Ft/Lbs
Bearing Caps      65-72   Ft/Lbs
Rear Diff. Cover  12-17   Ft/Lbs
 
Backlash Factory      0.10-0.15 mm (.005" - .007")  Check several points
Ring gear runout       0.002  Inch
Edited by Chris Duncan

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Got the thinner shims in and it looks like either two 2.10's or a 2.05 and a 2.15 are going to work. Sort of near the thin end of the selection but it will work.

 

Measuring backlash and got it to .007" with a 2.15 shim on the driver side and 2.05 on the passenger. Then started measuring the backlash at different points by turning the gears. Getting a varied measurement from .007" to .014" . What is causing this? Measure the radial runnout of the carrier, getting .007". Just a preliminary because I'm not sure where this is coming from but it's not good. Because it's not going to be able to set within specs.

 

It's probably the carrier. The only other possibility would be the bearing and I measured the inside bore where the stub axles run and that's almost zero, so it must be the carrier.

 

One question, the TeamM Factory box the carrier came in says "designed and engineered in the USA". But it doesn't say where it's made?

Edited by Chris Duncan

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The runnout I measured was on the carrier.

 

I called TeamMFactory in Califa and talked to a David. He said look down in the axle bore and see if the two washers are aligned. Sure enough they are not. He said un-bolt the nine 8mm allen bolts to loosen the carrier case and re-align the two washers. He also gave the choice of  shipping to them and they could do it.

 

I mentioned the warranty being void if the case was opened, and he said there would be a record of our conversation and the warranty would still apply because they told me I could open the carrier.

 

He had me send some pics and confirmed that was probably the problem.

 

So I loosened all the bolts, but left two of them tight to within a couple threads so the case did not come completely apart but was loose enough to move the washers. Aligned the washers by eye with a screwdriver and tightened all the allen bolts back up.

 

The carrier is now at .0015" runnout and the backlash variance is about .0015" also. The shims sizes also changed to 2.30 driver, 2.10 pass.

 

I do note that although the two washers are now aligned to each other they are a little bit off center to the axle bore, was thinking about making a jig tool to center the washers to themselves and the axle bore.

 

The next check is the contact pattern, a whole other can of worms if it's off and it probably is. Just waiting for the Prussian blue to come in at Napa.

 

I also asked David where the diff was manufactured. He said he wasn't sure exactly but it was "somewhere overseas".

Edited by Chris Duncan

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Found a socket that fit in the two washers very close and got them lined up to each other and the axle bore. Got the runnout and backlash down to .001" variance. Ended up with the same shims as the old carrier. 2.30 driver, 2.15 pass. and the tooth contact is good. So back together and back in the car, should be on track in another month. So all's well that ends well.

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One question, the TeamM Factory box the carrier came in says "designed and engineered in the USA". But it doesn't say where it's made?

 

Found the answer in TeamM Factory FAQ. Taiwan is pretty good, and still better than China.

 

MFactory® Helical LSD™:

Availability - since 2008

Country of R&D - USA

Country of Manufacture – Taiwan (In-house)

Quality Control – ISO Regulated

Metallurgy – Housings are open-die forged from SAE4320 steel. Internals are cold-forged from SAE9310 steel

Origin of Barstock - Japan

Heat-Treatment – Double Tempered, Super Sub-Zero (Deep Cryogenic), Micro-Peened Surface Bias Ratio (Max Torque Transfer): 75%

Warranty: Lifetime, Globally Transferable

Guarantee: 30day Money Back

MSRP (LSD only): $999.95

MSRP (Reconditioned Pumpkin): from $1499.95

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Looks great!

Here is a FAQ on mfactory site about diff fluid.

http://support.teammfactory.com/support/solutions/articles/8000007998-do-your-limited-slip-differentials-require-any-special-fluids-or-additives-

We used amsoil severe gear 75-90 in our diff and rb25 tranny.

 

 

From MFactory  FAQ's

 

Maintenance:

 

Oil: Regular 75w90 Synthetic Oil for Street/Spirited use. Heavier 75w140 for Race Applications. Recommended brands include Torco SGO and Redline NS. Limited-slip Friction Modifier must NOT be used, as Torsen (helical) style LSD's rely on friction in order to function.

Edited by Chris Duncan

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exlifesaver    0

78-280z

Yes the 78 280z MT has the longnose 3.545 gears The automatic has a R180 with 3.545 of the same year.

The initial offer of $ 700.00 for the first 10 units is over. The MSRP from the factory is $ 999.95. With Hybrid z members right now You can purchase one for $ 900.00 shipped.

The next batch of LSD's should be available in the coming weeks. MFactory will contact me. We will contact you if still interested.

 

Chip

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Did a track day at the Ridge Motorsport Park with this diff installed. No more one tire spinning. Consistently faster coming out of the slow tight corners, especially the hairpin. No noise from this thing, didn't even know it was there aside from the lack of any wheel spin.

 

Ran the Redline 75-W-140-NS

Edited by Chris Duncan

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Gaiden_08    0

Apologies if this has already been asked, does this work with both short and long nose R200's? I know you said earlier that it worked with 29 spline. Apologies again, I have entered untouched ground with my Datsun build and differential/rear end work is surely one of those areas that I am weak on. I currently don't have any clue what type of direction I am going, but R200 is looking like its going to be the easiest solution for my build.

 

Thanks in advance.

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exlifesaver    0

The next batch is ready to ship, I messaged everyone back that was interested in buying one. If anyone else is interested please reply here or send me a message.

Gaiden_08 I'm almost positive it will fit in a short nose R200, but i am curious as to why you want to use a short nose over a long nose? The conversion from a long nose r180 to a r200 long nose are pretty easily obtainable.

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