Will the 3.3 (open) Ring and Pinion gears would work in a 3.5 (VLSD) diff. with a Quaife diff. installed? I am currently running 4.08 gears, and the gas is killing me. I was going to swap back to the 3.5's, but if I could go 3.3, that'd be great.

Basically, is the ring gears bolt pattern the same on all the diffs? Are the pinions the same length?

Thanks,

Ian

 

i will trade you my 3.3 out of my sedan for your 4.08

 

If they are a direct swap, I might be interested. I currently have the diff. out of the car at this time too.

Ian

 

what is the year and car its coming out of? first gen sedan?

 

oh nvm i see its a 05 sedan. then yes should be a direct swap

 

It's a 1st gen. Sedan and I currently have the 4.08's in with a Quaife diff., and Diff cooler, etc. I don't want to swap pumpkins, just ring and pinion gears. I might just go back to the 3.5's, and sell the 4.08's. I need the $$$. LOL

Ian

 

Ok, after talking with OCG35, the 3.3's will not fit the Quaife diff. I have. I have the Quaife for the 3.5 VLSD cars, and the 3.3 open diff's have a thicker ring gear, and ARE NOT and direct swap. (not sure about the 3.3 VLSD diffs)

Thanks for the help everyone.

Ian

 

How much did your mpg change after you went from 3.5>4.1? Did it feel alot quicker?

 

I went from about 16 MPG (3.5 FD) to around 12MPG (4.08 FD). With my current commute being about 50 miles in each direction, I was having to fill up about every 2-2.5 days. I was getting about 220-250 miles out of a tank, and that was all freeway driving. With the 3.5 FD, I am getting over 320 miles out of a tank (freeway).

The car was incredibly quick around town, from stoplight to stoplight, but there was no "top end" on the freeway. I could surge forward to pass with no problems, but "ran out of steam" anything beyond that.

Basically, the 4.08 FD is great for around town, but if you have a long commute, they are not the right choice for you.

Hope this helps,

Ian

 

Just buy my 3.3 open diff and swap it out with yours

 

i have a 3.5....... hmmm

right? 05 6mt is 3.5?

 

Yes, '05 6mt has the 3.5 FD.

Ian

 

How long does it take to drop the diff and take out the ring?

so I wouldnt need anything else other than your ring and pinon?

Let me know if you were trying to do a trade or sell etc, pm me. Thanks!

 

The whole job could be done in a single day if you have all the tools needed, and parts needed. (but most people don't have a hydrolic press in their garage) I have a friend that works at a dealership, and has access to the shop/tools.

As for parts, I would recommend getting new bolts to attach the ring gear to the VLSD. They run about $3.00 each, and you need 10 of them. You also NEED a new Crush Sleeve, and oil seal for about another $30. These are what I would say are the "need to get" parts. If you have a good amount of miles on your car, you may want to look into getting new bearings, but they are a little pricey. You may also need to get some shims to properly "center" the VLSD in the housing to line up with the new pinion gear.

I don't want to turn this into a "For Sale" thread, so PM me if you are interested. Z1 Performance has the 4.08 gears listed at $565 + $25 shipping. They also have the "Install Kit 1" that has all the "needed" parts for $32.50, and "Install Kit 2" for $299. (new bearings, etc.)

Let me know if you are interested, and I will PM you the price I am asking.

Ian

 

I'm interested. 3 month bump!