Drop from 4.08 to 3.3 possible?
#1
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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
Basically, is the ring gears bolt pattern the same on all the diffs? Are the pinions the same length?
Thanks,
Ian
#4
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#9
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
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
#14
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
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
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