Hophead

Looks like I need to replace my rear third - I have found a 4.56 third locally but the owner does not know if it is a 4cyl or V6 third. Will a 4cyl third bolt right up? Or is there any issues with the drivshaft flange and/or axel spline count? Help!

Beaniam

The axle housings are identical

trbizwiz

I believe the difference is 4 spider gears versus 2 spider gears for the 4 cylinder. I don't think it will adversely effect you one way or the other. Where you get into trouble is with the rebuild kits you need the right gears and bearings then, but for a component swap either is fine, v6 is probably a little stronger.

91 4Runner

So in short - Yes. they will bolt in... No issues...

TOYOTA 1

bolts right up! the flange might be different but can be swaped.

Hophead

Thanks for the replys! Thats what I thought. Ends up the diff was perfect- V6 4.56-will bolt right up.

86Toyrunna

ya they will interchange.. flanges are possibly different, just have a 30mm socket to swap em. the v6 third casting is much beefier and is a stronger third but the 4banger will hold up fine