[Glennyd]

BIMMERPOST / Classifieds

Asking Price:

USD 350.00

Or Best Offer

Location:

✓ Will Ship

Item Interest

Big diff welded for 335I. 3.08. Mint, ready to go. $350 obo

[Gurv ///M3]

as in welded to be locked diff or oem ?

[Glennyd]

Not sure. Think it means that it is welded so that it is locked

[Hotrodmartin]

I'm confused here lol

[bb1857]

I'd imagine it means welded as in locked. Thats the terminology in the Jeep world at least

[Glennyd]

So this essentially a posi he rear-end

[Gurv ///M3]

it is the way it was from manufacture or had it been modified? which car did it come off year? auto or manual?

[Glennyd]

The diff was modified and it came out of an 08 335i standard e90

[Fundguy1]

Modified how? Is it an LSD?

[Glennyd]

Welded so that it is like a locker. Not limited diff any more. It's posi now. It's what you use if you want the best chance of traction to go straight. Lol. Less chance of braking also

[Fundguy1]

I don't understand. They come with electronic rears designed to downpowere the spinning tire till both tires grab. You can upgrade them to an LSD or position rear where after a few rotations both tires lock and spin together. The third option is welding the internals so they don't spin independently at all. This is for drag racing only. Rear tires would jump if this is done in corners. Our cars came with the casing either open or welded, meaning the gears were accessible or not. What you're saying doesn't make sense.

[Fundguy1]

It's probably a normal electronic posi rear like comes standard on our cars. Manual Transmission cars after mid 2007 run cane with the gearbox welded shut. If you wanted to make it an LSD it requires an extra $1000 in machining vs the open or bolted gearbox. Gear ratio us right for a manual. So technically this is a manual transmission rear with electronic slip control and a welded gearbox. To make it a true LSD is about $1900.

[Glennyd]

Yes, this is basically a race only locked diff. It can be used on street but on sharp turns its going to feel jumpy. I had the same kind of setup in my RX7 and you can tame down the jump a bit by what fluid you use. I ran that car as a semi daily

[Hotrodmartin]

I'm still confused lol. You sound like your not sure of what your saying. In one instant your agreeing that it's a stock diff yet try to explain it's welded completely like a Posi

[Fundguy1]

Exactly. I've never seen a welded internally diff for a 335i. I have seen the housing welded as its standard on manual cars, which I have.

[bb1857]

I understand what he's saying but can also see how it comes across confusing. It's a stock diff concerning what gears are in it but the diff action within that internal stock gear set has been welded so its pure posi all the time. So its kinda stock from a gear ratio perspective but not from how it performs. We do this all the time on Jeeps for rock crawling but definitely not a lot of fun on the street. Cheaper to do it this way for a basically race only setup versus dealing with all the electronic nannies that BMW tosses at you. Hope that helps a bit.

[Fundguy1]

Originally Posted by bb1857

I understand what he's saying but can also see how it comes across confusing. It's a stock diff concerning what gears are in it but the diff action within that internal stock gear set has been welded so its pure posi all the time. So its kinda stock from a gear ratio perspective but not from how it performs. We do this all the time on Jeeps for rock crawling but definitely not a lot of fun on the street. Cheaper to do it this way for a basically race only setup versus dealing with all the electronic nannies that BMW tosses at you. Hope that helps a bit.

I agree with you 100%. Just trying to figure out why you would do this on a 335i rear. Like you said, it ducks on the street and it's really only for trailering a car to the strip and dragging it. Since our cars suck at the strip and there are lots of options for a LSD, which is just as good, I'm not sure what good this is for except a dedicated drag car, which I've never seen before made from a 335i. If I were gonna do that, I'd put a Ford 9" in instead. This rear takes away the cars strength which is cornering. I was suspecting that since welded rear is a term commonly used for the housing of 335i and not the gears, that this was the case instead.

Can you tell us who did the work and have any pics?

[Glennyd]

Sorry for the lack of clarity here. The spider gears were welded by the welder at Spec Ops Motorsports. I'm trying to find pictures of the work that was done. It was not installed or used after mod was performed

[Fundguy1]

OK cool. That's a pretty unique piece. Good luck with the sale. Great for a hard core drag guy.

[theweebabySeamus]

Originally Posted by Fundguy1

I agree with you 100%. Just trying to figure out why you would do this on a 335i rear. Like you said, it ducks on the street and it's really only for trailering a car to the strip and dragging it. Since our cars suck at the strip and there are lots of options for a LSD, which is just as good, I'm not sure what good this is for except a dedicated drag car, which I've never seen before made from a 335i. If I were gonna do that, I'd put a Ford 9" in instead. This rear takes away the cars strength which is cornering. I was suspecting that since welded rear is a term commonly used for the housing of 335i and not the gears, that this was the case instead.

Can you tell us who did the work and have any pics?

Welded diff is going to outperform an LSD in a pure drag race situation. I get what you're saying about more streetable options, but someone might want that extra bit of grip.

[Fundguy1]

Originally Posted by theweebabySeamus

Welded diff is going to outperform an LSD in a pure drag race situation. I get what you're saying about more streetable options, but someone might want that extra bit of grip.

Yup correct. I just haven't seen an e90x 335i 90xmadequate into a dedicated drag car.

[Glennyd]

Agreed, this for either a dedicated track car or a car with big power that wants all the traction and durability when gets in that car. Thanks for the info guys