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2.8 to 4.8 swap question

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Old Oct 10, 2019 | 07:39 PM
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Hawkswings's Avatar
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2.8 to 4.8 swap question

I am doing a 2.8l to 4.8 Swap on an 87 firebird. My budget is shoestring but I am decent at making things work and or fabricating what I need.





I have picked up a 700r4 k case from a 5.7l 88 blazer but it didnt come with a torque converter. Now I still have the 60 degree 700r4 from the 2.8l and was wondering if I could swap the input shaft on the k-case with the 60 degree or if it would burn up too quickly/ be too short?




The car has never seen winter (I live in the salt belt of ontario) so it wouldn't be more than a summer fun car for the time being. Eventually it will be upped with a proper built 4l80 or stick shift. But to get it back on the raod, this is what I have to work with. I have already called around and cant find a decent one atm. And I am not afraid to take the tranny apart and swap things over. Also the k-case was rebuilt recently.

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Old Oct 11, 2019 | 11:48 AM
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maroe624's Avatar
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Re: 2.8 to 4.8 swap question

Originally Posted by Hawkswings
I am doing a 2.8l to 4.8 Swap on an 87 firebird. My budget is shoestring but I am decent at making things work and or fabricating what I need.





I have picked up a 700r4 k case from a 5.7l 88 blazer but it didnt come with a torque converter. Now I still have the 60 degree 700r4 from the 2.8l and was wondering if I could swap the input shaft on the k-case with the 60 degree or if it would burn up too quickly/ be too short?




The car has never seen winter (I live in the salt belt of ontario) so it wouldn't be more than a summer fun car for the time being. Eventually it will be upped with a proper built 4l80 or stick shift. But to get it back on the raod, this is what I have to work with. I have already called around and cant find a decent one atm. And I am not afraid to take the tranny apart and swap things over. Also the k-case was rebuilt recently.

Will not work. You need a v8 input drum. V6 700r4s have smaller. Shafts.
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