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105 auto Diff

Wanted 
3K views 19 replies 12 participants last post by  nealric 
#1 ·
Hi all , I am looking for a new diff for my 105 Alfa. Currently I have 4.1 ratio but am looking for something around 3.8-1. I have been told that Auto Spiders and Berlinas had these as standard so I guess there could be a lot of these in the US. I know you lot have problems using a " stick shift"
Any info where I could get one also would be gratefully recieved
 
#4 · (Edited)
I have been told that Auto Spiders and Berlinas had these as standard so I guess there could be a lot of these in the US. I know you lot have problems using a " stick shift"
Your logic is good. But unfortunately, the demographic that found driving a "stick" too challenging also lacked the creativity to chose an Alfa Romeo over a Toyota. So as nealric wrote, not many automatic spiders were sold in the US. I don't believe Alfa was still importing 105 Berlinas or GTV's by the time Alfa offered automatic transmissions.
 
#7 ·
You don't really need it for a ~200hp stock motor turbo setup. You'll spin through second on less than ideal pavement, but it's quite manageable overall. I've been looking for one for my planned 300hp build, but I've resigned myself to a life of wheel spin and tire smoke :laugh2:

Other option is a transmission swap. You can do a T5 swap for what it would probably cost to find an auto diff, and there were T5s offered with taller gears. Personally, I decided I wanted to keep things Alfa to the extent possible. If you have unlimited funds, Alfaholics will sell you a direct-swap Quaife sequential box with whatever ratios your heart desires.
 
#9 ·
Interesting suggestion- how direct is the swap? Aren't you also then looking at new brakes, parking brake, suspension attachment points, wheels, and a custom driveshaft? Seems like cost/effort would be comparable to the T5 swap if not greater. Also likely difficult to get a lot of that stuff in the U.S. - the solid axle Escort was never sold here, though I see the OP is in Europe where this isn't so much of an issue.
 
#10 ·
Auto diffs are out there. I posted here a few years back and eventually a nice race prep'ed one turned up. Just keep bumping your request.
PS - have it behind a v6 converted stepnose. Love it.
 
#13 ·
Perhaps you should extend you search to Australia. There was at one time quite a few Automatic Berlinas running around.
I know my friend Don who was a Flying Tiger’s Flight Engineer exported two automatic transmissions from Sydney. I’m pretty sure he also nabbed a few diffs as well. They went straight into the hold of his 747!
Good luck with your search.
Regards Daniel
 
#15 ·
I just checked. I paid $1200 in 2013 and worth every penny. Back then I had 2 folks offering to sell rear ends.
 
#17 · (Edited)
I don't think Atlas (escort) axels are easily sourced in the US, but I looked hard at them when I was looking for a taller rear end. this was the best overview of this option I found, https://www.classicfordmag.co.uk/wp...initive-guide-to-atlas-axles-classic-ford.pdf.
lots of ratios, three widths, new and used, lots to like there. I lucked out and found a listing on ebay for a center console for an auto spider, contacted the seller and bought the diff out of the same car. two decent auto spiders on CL right now, maybe you will find a flood-damaged mid-west auto spider on a salvage sale. search CL nationwide using searchtempest for Automatic spiders. shipping is going to be painful back to the old country!
 
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