hi,

I have a 95 3.8. if I drop in an LS1, will I have to change the tranny too.. I think I have an 4l60e. thank you.

 

not really

but it's almost impossible to put LS1 an in your body style.

sorry

 

You'd have to change out the tranny because of the different bellhousing needed to bolt up to the LS1.

An LS1 in to the LT1 body style is possible but a pain. I recall a guy posting in the V6 Forum last year when he did the swap.

 

ill give the generic answer when i say that for the most part, motor swaps into these cars aren't cost effective unless you get an absolute steal on a used motor and stuff...

you'd have to change (among other things)

-engine
-trans
-rear (not whole rear but do u really want a non-posi LS1?)
-brakes (again do u want 340+ hp and rear drums)
-PCM
-assorted wiring
-assorted suspension (im guessing you'de probably need at least V8 springs/shocks up front to compensate for the heavier motor.)
-hood (LS1 doesn't fit under the stock 93-97 hood i believe)
-exhaust (obviously)
-radiator (probably, im not sure)

this is just the stuff i think is important to change. there are other differences between the 6 and 8 cyl. cars.

-steering ratio
-gauge cluster
-etc.

If you have the money to do an LS1 swap, add it to the sale price of your car and go buy a factory LS1 car....MUCH easier.