4th Gen fbody with 3.42 gears?

**The Project** · 04-14-2008, 05:55 PM

Looking to find out which 4th gen fbodies came with 3.42 gears in them.

Also did they come with a diff or not?

Anyone know?

Want to swap out my 3rd gen rear for a 4th with 3.42 gears.

**Mr. Luos** · 04-14-2008, 05:58 PM

They all have a rear diff.

The 3rd gen rear is a different width than the 4th gen rear. Otherwise, I believe they are the same.

**The Project** · 04-14-2008, 06:31 PM

Originally Posted by Mr. Luos

They all have a rear diff.

The 3rd gen rear is a different width than the 4th gen rear. Otherwise, I believe they are the same.

I want to swap my rear and replace it with a 4th gen. Since I already have 3.42 grears I want to see if I can get the same rather than say 3.23's. I also have an auburn diff. So I want to know what kind of diff. came with the 3.42's. I'm not sure if I have a 26 or 28 spline.

Easier to swap out the entire rear.

**Silver Streak** · 04-14-2008, 06:43 PM

Easier and cheaper.. yes.. but your car WILL look retarded with the rear wheels sticking out 2 inches on both sides...

**Wesman** · 04-14-2008, 06:51 PM

Originally Posted by Silver Streak

Easier and cheaper.. yes.. but your car WILL look retarded with the rear wheels sticking out 2 inches on both sides...

So 4th gen rears are 4" wider than 3rd gens??

Interesting, didn't know that.

**Silver Streak** · 04-14-2008, 06:55 PM

Originally Posted by Wesman

So 4th gen rears are 4" wider than 3rd gens??

Interesting, didn't know that.

Yeah.. every gen's rear is slightly diff size... its weird...

**The Project** · 04-14-2008, 07:02 PM

Originally Posted by Wesman

So 4th gen rears are 4" wider than 3rd gens??

Interesting, didn't know that.

Yes.....the 4th gen is about 1.75" wider on each side. I am looking at getting C6 rims which is why I want a 4th gen rear (to eliminate using spacers in the rear).

What about gear ratio's?

**Silver Streak** · 04-14-2008, 07:04 PM

Originally Posted by The Project

Yes.....the 4th gen is about 1.75" wider on each side. I am looking at getting C6 rims which is why I want a 4th gen rear (to eliminate using spacers in the rear).

What about gear ratio's?

All 6 speeds came stock with 342s...

**rc74racer** · 04-15-2008, 01:12 PM

Giant waste of time IMO to replace one POS rear with another just to skip out on using spacers. To answer your question only 6spd cars have 342s. Autos come in either 293, 308 or 323.

**Silver Streak** · 04-15-2008, 01:15 PM

Originally Posted by rc74racer

Giant waste of time IMO to replace one POS rear with another just to skip out on using spacers. To answer your question only 6spd cars have 342s. Autos come in either 293, 308 or 323.

273 not 293.. but otherwise correct