2014 Focus ST Wavetrac Limited Slip Differential Install with setting preload correctly

Here I show how to install a limited slip differential in a Focus ST MMT6 manual transmission. I show how to set differential bearing preload correctly and other processes for seating races and seals.
Here are parts and special tools I used.
Shims:
91ZZ-4067-XA 1.1mm --measuring shim
91ZZ-4067-AA 1.4mm
3S7Z4067AA - 1.44mm
91ZZ-4067-KA 1.45mm
91ZZ4067BA - 1.5mm
91ZZ-4067-LA 1.55mm
91ZZ4067CA - 1.6mm
91ZZ-4067-MA 1.65mm
91ZZ4067DA - 1.7mm
91ZZ-4067-NA 1.75mm
91ZZ4067EA - 1.8mm
91ZZ-4067-PA 1.85mm
91ZZ4067FA - 1.9mm
91ZZ-4067-RA 1.95mm
91ZZ4067GA - 2.0mm
91ZZ-4067-SA 2.05mm
3S7Z4067AB - 2.08mm
91ZZ4067HA - 2.1mm
91ZZ-4067-TA 2.15mm
91ZZ4067JA - 2.2mm
Parts and tools
Digital indicator: www.amazon.com/gp/product/B01...
Slide hammer: www.amazon.com/gp/product/B00...
Engine holder: www.amazon.com/gp/product/B00...
Transmission jack:
www.amazon.com/Capacity-Trans...
Bearing race and seal driver: www.amazon.com/gp/product/B07...
Heat gun:
www.amazon.com/Wagner-Sprayte...
Differential bolts, Sealer, Loctite, Axle seals, and bearings:
www.mountuneusa.com/Ford-Perf...
Ball joint pinch bolt:
www.tascaparts.com/oem-parts/...
Ball joint pinch bolt nut:
www.tascaparts.com/oem-parts/...
Half shaft nuts:
www.tascaparts.com/oem-parts/...
Half shaft bearing retainer:
www.tascaparts.com/oem-parts/...
Dual clutch oil 2 quarts:
www.amazon.com/Genuine-Ford-X...
Wavetrac:
www.fswerks.com/products/wave...

[@MitchChubey]

hands down great video, Excellent explintations and defs made me 100% confident I could handle this on my own

[@chansaechao79]

I know nothing about the Ford Focus ST yet. watching this another 5 times I'll learn a little more each time. Thanks.

[@phildavis2861]

I have this on my list of mods for my 14 St3, Thanks for this vid, excellent work!

[@DevineDigital]

I have a VW and you'd be surprised how little information there is out there on the preload procedure, it's very similar but they note a .25mm preload. Our case is a little bit more difficult as we don't have the lugs that you have, so the hard way is the only way. Thank you for the video, it basically confirmed the process for me in combination with the videos I've found online.

[@mobilemechmantim773]

Excellent presentation!! Very thorough and precise. Thank you!

[@jeffreygrammes5137]

I could really use the parts numbers on the spacers your bid was awesome thank you

[@PS_on_youtube]

Thanks for the video! I'm in the process of converting my 2014 Focus SE's transmission to a Racing transmission (MTX75 - 5 speed manual transmission). The information here about 'preload' was VERY helpful and eye opening. Thanks again.

[@cccEngineer]

I've never heard of a racing transmission for the car. What makes the transmission a racing transmission?

[@johnjesusiskingofkings1770]

Thanks for this, really enjoyed it! Great work.

[@DashnCars]

Huuuuge props on the video and explanation of everything. I'm doing the same in the Fiesta ST world and I'll make sure to direct folks your way for the FoST side. There's a lot of misinformation on the install of an LSD in a FiST and you just helped me figure somethings out. Thank you!

[@fixins9868]

Always love to hear that I helped people. Thank you for your comment and support!

[@TheJambo2014]

@@fixins9868 Don't suppose you know if ford recommend a 0.2 extra in a Fiesta ST180 gearbox ?

[@fixins9868]

@@TheJambo2014 I don't know that I am sorry. One of the things you can do is take out your current shim, but in a measuring shim and get your free space by adding the measuring shim to the measured free space. Subtract this number from the factory shim and it should give you a good estimate on what your preload should be.

[@907thpeterson]

Jambo F1 manual says 0.14 for Fiesta

[@vinland98trance]

Very informarive video, thanks for making. Gonna try to put in my Mafctory later this year :)

[@k_vg]

Классное видео! Профессиональная работа!

[@KyleNelson279]

Great video! i didint think i would watch the whole thing but your a great teacher an know what you're talkin about!

[@KyleNelson279]

im on the cobb stage 3 tune my clutch is going out. i was going to go with a aftermarket clutch but after this video i think ill save on a oem clutch and put that money into a lsd! Thanks again for this awsome video!!

[@AJT773]

Thanks for the informational video!

[@opasnayezda]

Благодаря этому видео, я понял как считать натяг подшипников. Летом тоже буду ставить блокировку.

[@therealkarl88UF6BRXQ]

Nice infos. Thanks for showing it.

[@fixins9868]

Thanks for watching! I am glad you enjoyed it.

[@FocusedHands]

This is great!

[@FocusedHands]

Ok I have the measurements for my MTX-75 now... Mine calls for a 1.95 shim to be used. Getting the dial to stay zeroed out was way harder... but I got it done. Ran my test 3 times to make sure my #'s were right.

[@Sparkplugsteve]

Brilliant video. Im Soon to be fitting a lsd to a fiesta st and been searching for preload info. I'd imagine the 0.20 extra would apply to the fiesta since its similar bearing principles. Thanks for the video

[@wilsontennis31992]

Spark Plug Steve fiesta preload spec is .14mm per fsm

[@907thpeterson]

@@wilsontennis31992 do you have a source for this information?

[@wilsontennis31992]

@@907thpeterson Factory Service Manual, under Transmission Assembly, Step 11: Determine the thickness of the differential adjusting shim: Determined differential end float is X mm. Differential bearing pre-load 0.14 mm. Required adjusting shim thickness: X mm + 0.14 mm = X mm. Determined adjusting shim thickness. If the determined adjusting shim thickness is unequal, then use the next closest thickness of adjusting shim.

[@philipsheridan2952]

Thank you very much for the video, you have shown me that I will not be doing this mod on my own LOL

[@angelcanales6487]

Holly really. That's wats. Wrong with mine. Thanks for the perfect reference

[@axelriet]

Thanks for this very informative video! Could you please add the complete dimensions of a shim in the description (accurate I.D. and O.D. in mm) please? I have trouble finding some of them, and the 0.05 ones seem to be very expensive at $40 each, so I want to try and see if I can source a kit somewhere. Thanks again!

[@boost351]

First of all thank you for teaching us how to set bearing pre loads. Would this procedure be the same if your replacing a standard non LSD Differential bearing on a Ford Focus 2.0 tdci. Does inputshaft and output shaft bearing have pre load setting as well. If so would it also be the same procedure on setting it up? Thanks again for your help and advice 👍👌

[@samsonyunited]

What woud happen if you just change the bearings and seal it and send it. I just changed and sealed it and 3,000 miles no issues YET. Mountune told me "We have rebuilt hundreds and MMT6 gearboxes and have never had to change the shims from what was included in the factory build. Of course end play was measured and found to be within spec. If your's required new shims, it would be an anomaly." Jackstransmission had the same opinion too. I think I will be fine since it had low milage on it

[@ConnorPawlowski]

No response yet.... hmmmm. How's the Trans holding up?

[@kindica09]

hi! enjoyed this tremendously! good reference! however, you started with a 1.73mm shim. you replaced with a 1.65mm. would this .08mm difference, or .0031inch, effected the LSD's performance had you chosen not to replace the shim?

[@fixins9868]

It probably would not effect the the performance of the LSD or what it is meant to do noticeably with daily driving. It could effect the longevity of the bearings or if you are tracking the car to where the temps are always high.

[@wilsontennis31992]

Thanks very much for this video. My only question is why use a measuring shim at all? Couldn’t you install the races without the measuring shim and do the measurements that way?

[@fixins9868]

Perhaps, but I think the M shim is there so that the diff carrier doesn't hit the case. If you were to use no M shim the carrier might bump against the case while measuring giving you a false reading. Everything is very tight in this case. Just my guess why you need to use an M shim.

[@akaitv6606]

Is this transaxel similar to mazdaspeed 3 mps

[@alexstromberg5865]

Good chose dual mass sucks being experienced makes it way harder to drive smoothly I've found I hop in any car that's not a dual mass and it great lol

[@specter116]

great video my friend. let me add this..... to me this information is a bit confusing after watching your video. i purchase the quaife differential and the kit from mountune . i was curious when i read the instructions on the ford performance website and it mentioned nothing about reshiming the differential. i contacted ford performance and they said that it wasnt necessary to reshim using the kit....maybe its the brand? either way thumbs up on your informative instructions.

[@fixins9868]

You are correct that Ford performance says nothing about re shimming. However, if you read the factory service manual it says that if the bearings are replaced that you should shim. Its up to you. If it is slightly too tight, it will wear in over time. If it is too loose, it will get more loose as time goes on. I wanted to know it was in spec, so I did a ll the measurements to have piece of mind.

[@westtexas501]

Where can I get that seal driver set ?

[@brucepamplin8218]

hey i am looking for some shims. youdont want to sell one do you? lend me the measuring shim? ford tells me its backordered until julys end....crazy times

[@zrnjan]

Great video! I've been browsing videos for Focus Mk3 hatchback reverse gear grinding/jumping off but couldn't find much. That's how I found your video, you sound like quite well informed about Focus gearbox, any idea why my reverse gear jumps off/disengages off of reverse/grinds and still somehow stays in reverse sometimes? The Focus is 2011, Mk3, 150 BHP, 1600 cc, petrol, Titanium edition. Any thoughts will be much appreciated.

[@fixins9868]

If its jumping out of gear that means you have one or more of these problems, worn reverse syncho, worn dog teeth on the reverse gear or reverse slider, a bent or worn pads on the reverse gear shift fork, or highly unlikely, a messed up shift tower. You can't really know until you take it all apart.

[@zrnjan]

@@fixins9868 Great answer, Sir! I took it to Ford dealership and they were hesitant to open the transmission/gearbox, so they started with the gear cables/linkages, thought that gear linkages were to blame - but nothing improved upon adjusting the gear linkages. Then they focused on the shift tower (I really didn't know that it was named like that, but I guess it is the part that mounts on the transmission bell) and told me that the shift tower had some play in it, I really don't know what is the extent of the play they've mentioned. Does the shift tower have some play in it inherently or it should be all tight and snug in the shift tower?

[@fixins9868]

@@zrnjan it shouldn't be tight and it shouldn't be loose if that make sense. I have never seen a shift tower go bad unless it was dropped.

[@zrnjan]

@@fixins9868 Hhmmm.... I too share your opinion and I am not that convinced that the shift tower is to blame, but we'll see what the future attempts bring. I haven't seen the shift tower taken out of my car in the dealership and I can't tell what the amount of play was in it, but somehow I share your opinion that the culprit will be inside the gearbox. Anyways, I'll let them order new shift tower from the factory in Germany and replace it and we'll see how it goes. The least I can do is tell you what happenned as a sign of thank you for your time. :) Regards, man.

[@zrnjan]

@FixIns Just to let you know what happened, an update. It turned out that something like a ring with teeth around its circumference and another toothed ring which slides into the inner diameter of the aforementioned ring were the cause. The inner ring had slots for three pads and the pads had three spheres in them. The spheres would then fall/click in three dents spaced 120 degrees around the first ring. I guess you would call the setup reverse gear or reverse slider when naming the rings and when naming the pads with the spheres inside them you would call that setup pads on the reverse gear shift fork. Correct me if I'm wrong. Plus a reverse synchro ring was replaced and now I don't have any issues with the reverse, the first gear still sometimes needs to be gentle with her and patient, but that doesn't bother me at all. I thought to let you know because you were somehow dragged in the situation by me, so this was a kind of a thank you because you found the time to offer me help. Regards!

[@jaseinasia4202]

Rather than use the Ford shims, can't you go to any bearing supplier and buy the correct sized shims at a far cheaper price? I got my shims from a bearing supplier when I got my Timken bearings. This was for an R53 Mini Cooper S and Quaife LSD - exactly the same gearbox as the Focus ST. You're process for preload is on point and far accurate than feeler gauges and better than people assuming it will be OK without even measuring.

[@fixins9868]

I looked all over the place for shims that weren't ford. When I bought the shims they were cheap but now they've ballooned massively. Do you have a site you can list where you got yours?

[@jaseinasia4202]

@@fixins9868 I got mine at an industrial bearing supplier - the same place I got my Timken bearings. I'm in Hong Kong, so it's a bit different here. There's a whole street with about 10 bearing suppliers which just about every bearing you can think of. The shims all came from the usual bearing manufacturers and I believe different grade strength was available. I just told them the application and size and they gave me something to suit. I'm due to do another Mini LSD soon, so I'll take some photos.

[@music7arts]

*Question please need advice....* Does the preload have to be set on standard Automatic DPS6 2014 Focus? No mods at all, I am only going to put new tapered roller bearings in the existing differential and put a new case half on because the the locating tab sheered off, I am putting a new clutch kit in as well. Someone please give some insight so I get this is correct. Thank you!

[@fixins9868]

Any time you have a tapered roller bearing there is ALWAYS a preload. Its just how tapered rollers work. I don't know what the spec is. It should say it in the service manual somewhere.

[@music7arts]

@@fixins9868 Thanks, I found that the transmission clutch side of the case, the race was good and did have a preload set already with a spacer from the factory. I was limited on what was needed to redo the preload so I decided to just put in the new race only on the new gear portion of the new case and put two new bearings on each end. So it is driving fine right now, lets hope it will be fine for the long haul, which I think it will be. Both bearings I replaced had a lot play in them.

[@ZhinoZ]

Can you tell me where can i find the speed sensor? Because only show me the revs on the cluster but the speed is not working

[@fixins9868]

2014 focus st doesn't have a speed sensor, it uses all 4 wheel speed sensors to figure out the speed.

[@devinshwiry7280]

So quick question, I've been searching for these shims or shim kit that works, do you have any links where to buy the shims

[@CheapBikeOwner]

looks like he got them from the ford dealership

[@devinshwiry7280]

@@CheapBikeOwner I've check 3 of my local dealerships and none of them knew what I was talking about

[@CheapBikeOwner]

Devin Shwiry oh wow

[@devinshwiry7280]

@@CheapBikeOwner I know right, I asked them what their procedure is for fixing trans synchros etc, "well we just replace the whole trans" I was like seriously? And just hung up

[@CheapBikeOwner]

Devin Shwiry Lol that sucks!

[@dannyj7618]

I did my first ever clutch and pressure plate install on '15 FoST. Everything went back in, Putting in the transmission was a bitch and a half - especially doing this on jack stands. I fucked up the bleeding procedure. Workshop manual states that you should PUMP OIL IN through the bleeder valve. I put a vacuum on it, and blew a seal on slave cylinder. Said fuck it and gave the car to AMMCO. They did great job, $1000 bucks to replace a 3 dollar seal inside a tranny. But car runs like a champ. Im a little jelly about your LSD. Any update on lightweight flywheel. I heard people who installed it said they regret it, because taking off takes WAY more gas. A lot of them said they would keep the dual flywheel.

[@fixins9868]

That sucks, I'm sorry that happened. I've vacuum bled these before and never had them fail. So maybe you just got a bad part. I always pressure bleed them now because it seems to work better to get all the air out. I ended up going back to the dual mass. It is a lot better for driving around town. The light weight is was really great when I was driving the twisties, but that was a lot less than around town.

[@dannyj7618]

@@fixins9868 Right on, thx for the update.

[@barnhousegarage]

Where can l find parts, other than the ford garage?

[@fixins9868]

www.jackstransmissions.com/

[@GTkyle]

Are you willing to sell the measurement shim as well as all of the leftover shims?

[@fixins9868]

Sorry no, they will be handed down to my next of kin because they are like gold now.

[@GTkyle]

@@fixins9868 lmao no kidding. I went out on a whim, bought the smallest shim to test against. Thankfully the factory shim ended up being correct for the preload.

[@fixins9868]

@@GTkyle Thats good, yeah typically the installed shim will be pretty close. I always check it because there could always be that one time where it is off.

[@GTkyle]

@@fixins9868 yeah I agree, I'm too OCD to not at least have checked. Was worth the 13 dollars I paid for the one shim

[@k_vg]

😊

[@907thpeterson]

Instead of buying a digital indicator, couldn’t you just use the feeler/depth gage on a digital caliper?

[@FocusedHands]

Soooooo I got a couple question!

[@FocusedHands]

Where do I get the measuring shim? All these transmission shops around me do not do this lol. They just lazy!!

[@FocusedHands]

Nevermind I found it!