My dad has a 1984 buick t type that we ended up putting a buick 455 in it. But about a month and a half ago we bought another 84 that is a light blue with t tops and the original 3.8 with a brand new turbo. The New buick has an open differential in it. Did they make t types with them? Or is this something someone put in?
t-type differential question
- Thread starter 79cutlasssalon442
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Yes they came with open diff. My 85 TType had open 8.5. 84-85 was an option for posi. I believe 86-87 was pretty standard for posi.
86-87 GN was standard. Is what i meant. Ttype ,442 etc was an option. Which is why I said pretty standard not standard. Sorry Einstein. God forbid i make one wrong statement.Blake442 said:
chevy2480 said:
g80 was an option until very late in the 87 production year when the Grand National became its own model. Option throughout 84-86
http://www.gnttype.org/techarea/picture ... guide.html
Like said above, it was always an option on T-Types but std on the GN in late 87. I know someone local with 2 86 GN's that must have come from the south. Both are open rears and both have no rear window defroster.
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