I've got an RS6F51R transmission. It comes with the 2.2 turbo Diesel in the N16 chassis (derivative of the B15). I'd love to have the HLSD out of any of the RS6F51's and after recently getting hold of info from both the A33 and B15 SpecV I'm 99.9% sure the HSLD will drop into mine too.

It looks clear that you guys have been successful with A to H swaps. Here's the cross sections of the trannys, close up on the diffs to compare:

N16 RS6F51R


A33 RS6F51A


B15 RS6F51H


Plenty of space for the B15 HLSD which is a bit bigger as you can see and takes up more space at the bottom left of the diff, where 20 points to the diff casing on the H.

BTW the only difference between the tranny casings I can see (between the N16 and other two) is the slight change in shape on the (UK) passenger side, cabin side of where the driveshaft goes in.

If there's something I've overlooked and if you might be able to confirm that I'm on the right path then I'd very much appreciate it

I seem to have two options. Import a transmission or diff from the US, or a second option to buy here in the UK, a Quaife HLSD (QDF8L). I think importing might end up being the cheaper option. I have a spare box here to trial so wouldnt mind getting hold of one from the US for cheap so see if it really is possible. I know it would open up a great option for anyone tuning these cars in Europe .

Thanks!

p.s. I can't work out what the R means in my transmission code. I understand A, V, and H but this is a new one!

 

I've been digging around a bit more and it seems that the QDF8L Quaife diff is made for the 5 speed trannys. Is there any chance that the diff will fit in the 6 speed?

 

As mentioned I'm in the UK so it would easier to use the Quaife diff as Quaife are quite local to me (We don't have the A34 Maxima, and A33 Maximas are all Autos over here). There's a good chance the Quaife is a stronger unit too. Also the ratios in my Diesel are quite different so I wouldnt be able to use a tranny from a petrol.

My question is whether the Quaife diff which states it's for a 1995-2001 Maxima will fit in the RS6F51? If this isnt an option for me I will probably buy a new Nissan HLSD diff, and with any luck I can get Nissan UK to import one for me .

At the moment there's a group buy running for Quaife diffs so if I can confirm that the QDF8L diff fits I can get in on that with a healthy discount .

 

Thank you to NmexMAX for moving my posts here. I'd be very grateful of some discussion and feedback on this .

 

The 95-01 tranny is completely different.

You will have to find a 02+ HLSD unit, it should swap right in

search the 5th gen forums for the installation of a HLSD unit into a non HLSD 6speed

 

That's actually where I originaly posted before my post was moved to create it's own thread .

I believe now that an A34 HLSD or B15 SpecV HLSD will fit into my tranny no problem so I just wanted to clear up whether the Quaife LSD will fit. If the Quaife is made for that very different 95-01 tranny only then it won't. So thanks for clearing that up .

I would buy second hand but most people seem reluctant to send anything abroad .

 

Your best bet might end up being a dealership since they can usually get better deals on shipping, maybe they can ship it to your local nissan dealer for cheap.

 

this was the original thread:
http://forums.maxima.org/5th-generat...nsmission.html

 

That's what I'm hoping. I'm doing that with a bonnet from Japan and as long as you give them the part number it seems they can import the part ok. The bonnet's price wasnt too bad so it may not include their import/shipping costs. So I'm hoping the LSD will be the same.

Here's the part:

http://www.courtesyparts.com/38411z-...838_2902_2922&



I guess this is the same LSD as in the A34?

Although B15 part number is 38411-B15U009, and A34 is 38411-A34004.

 

It seems like it can work....

Another option is the Phantom Grip LSD, i've been eyeing it to use on a broken 5spd that I have, but while looking at it, I realized it can also work with an Open Diff 6mt diff too.

 

The tranny housing around the diff is the same for the open and LSD diffs though in the 6mt, so does that mean any LSD for the 5mt will in fact fit the 6mt?

If anyone has the FSM for the 5mt that would be good to check the same diagram of the transmission as in my first post please. I'll have a search of the forums now in case the FSM is already posted .

Thanks, I hadn't heard of the Phantom LSD before

 

Right sorry I've just looked up the Phantom Grip and now that I understand what it is please ignore my previous comment about it!

I'm going to be running about 350lbft of torque so I'd be worried about how well that would cope. It's the reason I wouldnt want a VLSD too. An HLSD is really my only viable option. I'm still waiting for Quaife to get back to me after having a bit of a technical to and fro but if that falls through it seems assured that the B15 SE-R SpecV 6MT HLSD will work .

 

I just noticed that this website lists the Quaife HLSD for Maximas between 1981-2009 - http://www.jdmhub.com/index.php?rout...duct_id=236685. does this fitment date have merit??

What's also interesting is that after looking at the tranny diagram from the 1999 A32 5MT, while comparing with the 2002 A33 6MT, the Quaife QDF8L seems to be a lot more like the shape of the diff in the latter (in other words the diff in the RS6F51, which is what I need!).

click for big versions...

1999 A32 5MT -RS5F50A/50V


2002 A33 6MT -RS6F51A


Quaife QDF8L

 

It could bolt onto your final drive ring, which is what you would need to keep because you would need to match the main shaft to it.... Never been done before, this is something for someone who has the parts laying around... crap wait, I do.... if my current interest in my old 5mt falls through, I'll start seeing the similarities between the two trannies diff's

I have not looked into the Quaife unit that much purely because of the cost involved would = the cost of me doing a 6spd swap, i really don't know too much about it, but if it's similar to the Phantom Grip then I don't see why not....

 

Quaife have got back to and said "it's not the same unit". I feel it doesnt quite answer my question to them as to whether it can fit. So, just to wrap this up before my group buy ends, are we sure that a 6MT diff doesnt fit into a 5MT?

aackshun, you can see from the diagram and photo of the Quaife diff in the link that it's a complete diff unit, so not at all like the Phantom device.

 

Hrmm.... It does look like it bolts onto the FD ring... but again this is all uncharted territory here.... I honestly have no idea about this.

 

Ok not to worry, thanks though .

Nissan HLSD will be the safer and easier bet then. What I'd like to check is the shaft spline on these please, to make sure my drive shafts will fit into it. I'm hoping that because my transmission code is the same, that Nissan made the shaft splines the same too. Does anyone know if the spline for the B15 shafts is the same as the A34, and if so, what is it please?

Thanks

 

The shafts won't be your problem, I bet all of the driveshafts have the same splines, but getting one that mounts up the same as your current ones.... That's the tricky part....

But wait, why do you need new axles? Aren't they all the same for the 6mt? Why can't you use your old ones?
I'm kinda ashamed that I don't know this already being that I just did a 6mt swap....

Btw there's a bombed 5mt @ my mechanics shop, I will be able to find out the similarities and differences between the two diffs soon.

I would take apart my old 5mt but there is someone interested in buying/rebuilding it, so I don't want to take it apart.

 

Why would getting 'one' that mounts up be a problem? You mean the LSD or..? I'm 99% sure that an HSLD from either the A34 6MT or B15U 6MT will drop into my transmission.

aackshun you've read my opening post and you realise I don't have a Maxima yes? I didnt say I need new drive shafts, but I do need to check as my box although having the same code, does not have the same diff as in the Maxima, hence the 'R' code letter. So it's a variable that could mean different splines (knowing how Nissan like to do this sometimes!). If the spline is different then I'll have to sort something out (Maxima inner CVs or something) else give up altogether. But on the other hand if the spline on the HLSD is the same as the spline in my current open diff (which might be different from the 'A' open diff in the Maxima you see) then woohoo!!

 

Sometimes, how about this....

5mt = 4at = 5at = 6mt for maximas all have the same splines axle wise (hell, since my tranny is out of a B15, then B15 axles will work with maxima axles... But we all know we can't just grab a B15 axle and throw it on a maxima, vice versa).

The problem is.... Where the passenger side axle mounts up, that was my problem during my swap, sure 5mt/4at axles go right in the 6mt tranny, but the problem is where the mount is for the pax side axle was literally 1 inch off in the wrong direction, not allowing the shaft to fully mate up with the diff. So I had to buy a 02-03 A33B maxima passenger axle

IMO the R stands for RHD, the bellhousing could be shaped differently to allow for accessories and other things to be put on the L side of the car that would normall be on the R side of the car.

 

A member on the altima forum put a HLSD from a 6spd into his altimas 5spd. Another member also did the same but the shop messed up the install.

Just a little fyi.

 

A member on the altima forum put a HLSD from a 6spd into his altimas 5spd. Another member also did the same but the shop messed up the install.

Just a little fyi.

 

Yes, I really do think the diffs are compatible, I will be finding out very soon, I have a destroyed open diff 6mt and a broken 5mt I can get access to, give me a few days.

 

I won't have this problem though as I'm not changing trannys. See my original post and compare the R and H diffs. Inputs for the shafts are in the same place, as they would be being the same tranny and casing.

 

Ah now that's interesting! Thanks! So I would assume it would work the other way round (as in the case of what's needed for the Quaife). Do u know what was needed for it to drop in to the 5mt correctly?

 

The final drive ring, everything else shouldn't be needed if I'm correct...

 

Thanks that would be great to find out.

 

I hope so. I would need to change to my drive ring anyway as the diesel rs6f51 uses very different ratios.

 

The final drive ring and the input shaft are what make the final drive ratio. Divide the teeth on the final drive ring by the teeth on the input shaft and that will be your final drive.

Depending on what your trying to achieve you might need the final drive ring and input shaft. If your going to keep the same final drive then just reuse the final drive ring. It should bolt right up to the diff with no problems.

 

Yes I intend to, I already understand that the ring will bolt on ok .

So again, I just need to check the spline of the drive shafts, (diff side) on the A34 to compare with mine please .

 

Hi dude u had a chance to check if the diffs are swappable? . My group buy is ending soon and its for a Quaife LSD for the 5mt and would like to know if it'll drop in the 6mt. Thanks

 

Monday, send me a PM in the morning US time to remind me, another one of my friends just bomb'd their tranny so now they have two bad 5mts

 

Got the PM, I dropped my tranny off @ the shop, I'm on the hunt for a HLSD now, we'll see how close these diffs are sooner or later, when does your group deal end?? I'm going out of town wednesday.

 

Cool . If the standard diff from the 5mt goes in the 6mt that should give the info we need though. Group Buy deposit ends in two days on the 30th, but I'm hoping that because the QDF8L is in stock on the shelves I won't need this and can join in later. The other guys are having them made up for the SR20 FWD box so they have to pay the deposit.

Thanks again

 

I would be incredibly surprised if the 6spd HLSD went in the 5spd maxima trans. The 5spd altima trans is not be confused with the 5spd 95-01 maxima trans, the 5spd altima trans from the 3.5L altima is essentially identical to the 6spd maxima trans with just one less gear on the shafts, neither of which shares any major parts in common that i am aware of with the 5spd maxima trans. It makes sense that it would the HLSD from the Maxima/Sentra would go in the 5spd altima trans, it would boggle my mind if it somehow fit in a totally unrelated transmission.

also, those "part numbers" off courtesy's website are not actual part numbers. they are made up by courtesy and only the first part of them (the 38411 part) has any connection to an actual nissan part number, so you shouldn't use those to judge anything really.

you might inquire with the toyota celica and hyundai tiburon guys, they use versions of the same transmission as the 3.5L Maxima and Altima. Not sure if they have quaife or other aftermarket LSD fitments available (probably not but you never know).

edit: just found that OBX makes a limited slip for the celica, you might look in to that. though I'd be hesitant about using an OBX diff after an experience I had trying to install one a few years ago. Not a fun experience.

 

^ That does make a lot of sense, I have never seen an Alti 5mt, but after doing my 6spd swap I learned a lot about it... Didn't know it was a cable shift 5mt, that ish is crazy!!!

Either way, I have the parts lying around, just not the time this week, next week fo sho!

 

Yeah don't worry about the mention of the Altima.

It just it could be one of those things where it only needs the ring gear and bearings changed and it will fit in the 6spd (5spd in a 6spd is what we're after here as its what Quaife make for ).