4l60e confusion!

[cshupe]

I have just purchased a 1997 Yukon which has a bad transmission. It has the one piece bell housing 4l60e and I purchased a used one which is a two piece bell housing. I have been told that it will work and I have been told that it won't. Looking for some help from you hopefully to make some sense of this. I had no idea a transmission could be so confusing. It is a 4x4.
Thanks,
Chris

 

[retorq]

I thought only the LS based 4L60s were full circle bell housings ... I understand the torque converter was different ... I doubt it will work but I'm not an expert, just built my own.

 

[blueflamed03]

there are several versions of the 4L60e.

 

[cshupe]

Thanks blueflamed

I was looking for a bit more than they have different models. I need to know if you can put a two piece bell housing on a car that came with the one piece. I am well aware of the different options but desperately need to know if I can use the two piece or do I need to sell it and buy a one. Anyone who can answer this I will be grateful.

 

[cshupe]

4L60e HELP

I am new to this forum and seriously need help. Let's face it the transmissions in our vehicles aren't know for there quality and long life. I need to know if you can put a two piece bell housing in a car that came with a one piece. I see several issues that cause concern, one is how do you cover the bottom of the case as there is no where to bolt the housing to? Is there a cover you can buy to put on the bottom to cover the flywheel and torque convertor? I have to imagine that I am not the only one to have asked this question?
Thanks,
Chris

 

[retorq]

According to James B at FSC the TC is for sure different (like I said above), most of the bolts are the same. I'm sure you can fab up a cover if you are that concerned ...

http://www.fullsizechevy.com/showthread.php?104387-Differences-between-NBS-and-OBS-4L60E

 

[steamroller]

Mine is an early 96 build and has the removable inspection/dust cover like the 700r4. I've seen them with both styles though so either will work. There are 2 braces that run from the removable lower up to the frame by the motor mounts, this may be a 4wd only thing though. You should be able to get the cover and braces at a junkyard, only 6 or 8 bolts hold it on, and the trans doesn't have to be dropped. If you need a pic or 2 I can try to get you some.

Different bellhousing and different input shaft. The M30 for the Gen-III motors use a 33-spline input shaft vs. 30 for the Gen-I and Gen-II SBC.

The way I read that is if it came behind a Gen 1 or Gen 2 engine you should be good and the torque converters will be the same

 

[Jaycenk]

You just need to messure the input shaftes and count splines to make sure it isn't an lsx trans. I belive the input shafts are different lengths. I know they are between the LS1's and the LT1's