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Thunderbird 8.8 diff questions

2K views 4 replies 3 participants last post by  LostSoulMiata 
#1 ·
Okay so ive been searching around and can't quite find all the answers. This winter im gunna be pulling my boosted 1.6 for a fe. I'm looking at doing the 8.8 swap (i know a 1.8 diff would handle it) im just confused what year thunderbird has the diff i need. 83-88 is when they first got the turbo 4 but they also have it in 89-97. Are the 8.8's the same in both these models? also i know they come with a 3.27 gear and are stamped 3L27 for a lsd. But are they offered in a different ratio? or am i going to have to rebuild it with aftermarket gears? Thanks guys
 
#4 ·
the seller of the diff im looking at said The tag read this. S509b. 73 88 1L14. iv been searching for hours on different forums and i cant find a match. i found that s509b is 90-93 thunderbirds, 88 is a 8.8 ring gear, but i cant find 1L14. the L means track lock but the gear ratio dosnt work out, normally its 3L27 for a track lock diff with 3:27 gears. confused:|
 
#5 ·
Actually, they had a v6 in the 10th gens and the SuperCoupe was a SC'd v6, no 4-cyl option. IRS was from '89-'97, you can also nab one from the Mercury Cougar, same years/body style.
 
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