4.3 to 5.3 swap
 

I have a 2000 4wd with a 4.3 liter engine and would like to swap to a 5.3 liter besides the harness, computer, and accessories what else would be needed to complete this.

Re: 4.3 to 5.3 swap
 

Besides what you have already know, you will need (from a V8 doner) Throttle cable,cruise cable,engine mount stands,Fan stroud,radiator hoses,fuel lines, And the biggest thing to consider is the trans the converter spacing is different and V6 4l60Es only have 5 3-4 clutches VS 6 in the V8 version. your best bet is to use a 5.3 trans & it has to be a 4WD trans because of the different out-put shafts. All in all the easiest 5.3 swap.

Re: 4.3 to 5.3 swap
 

sorry for off topicidness, but is this a similar situation from going from a 5.3 to a 6.0? or is there more to that?

Brad

Re: 4.3 to 5.3 swap
 

The early 6.0 had different cranks (99 & 00) than any other LS based engine.

using a late model 6.0 all you really need is a long block

The computer & intake are the same between the 6.0 and 5.3.(The 4L80E 6.0 computers are different)

Dont count on your stock 4L60E to last long with a heavy foot.

Re: 4.3 to 5.3 swap
 

This guy is correct, 99-00 6.0s were iron head, and had a different crank that doesn't mount up to the 4;60e correctly.

01-07 6.0s have aluminum heads, and the crank spacer for the 4l80e can be removed and mated to a 4l60e

Everything off your 5.3 bolts on/hooks up to the 6.0, get the computer tuned and drive. But your 4l60e will not like it very much. Look into a few basic upgrades for the trans such as a shift kit, and corvette servo to give it a little more holding power.

Re: 4.3 to 5.3 swap
 

yea i mean idealy i would switch to a 4l80e if i were to change to a 6, but its nice knowin all it needs is a tune and it can use the same parts....thanks guys, and again, sorry for bein off topic...

BRAD