UPDATE: I figured it out - see post #3

I just removed my 2009 4L65E to rebuild it with some stronger parts and immediately got stumped by the 4-point Torx bolts on the bellhousing. I know that most 4L60E use 6-point T50-Plus bolts, but it looks like GM changed to something "new":



A link to where to buy such a socket would be much appreciated.
Thank you.

 

Those remind me of those one way heads. You can tighten them but the same tool won't loosen because there is no shoulder to grab to when turning in reverse.

 

I took the picture to my local dealer (Suburban Chevrolet) and their trans mechanic had the answer - its a "Mortorq". Here is an article about it:

http://www.garagejournal.com/forum/s...ad.php?t=85712

These bolts started to appear in some 2007 GM vehicles and are intended to replace the troublesome Torx bolts used before.

There are two suppliers of bits:

Snap-on: PFMTS4E

Kent-Moore: DT-49037-A

The bits are about $25 each.

 

Just ordered my self one. Thaksk again.

 

the links don't go anywhere....so that was a bust....could maybe mention which size mortorq it is that fits it? Lots of places sell it not just snap on and whoever that other company is....is it the 10?

 

A quick search of those tool numbers gives you multiple options. The link to the article worked for me.

By the way those post were 10 years ago.

 

Search Amazon for "Titan 68965 5-Piece 3/8-Inch Drive Mortorq Bit Socket" which is a set for $36. Most views mention it worked on a 4L60E. You can buy individual bits for e.g. $9, but don't know which size - M1, M2, M3, M4, M5.

 

I have that set and it works well , Well at least as far as i can tell only used the one bit out of it a couple times those far but it did the job no issues with the earthquake impact lol.

 

Cool. Which bit is it for those who don't want to buy the whole set?

 

I will look tomorrow , to be honest i grabbed the one that looked right and used it didnt even look at the number on it.

 

oK I looked and unfortunately I didnt pay attention to the number when I used it and it has no marks argh but I am pretty sure was M3 but cant swear on it . But will update next time use it unless someone else verifies .

 

The 3/8" -Drive Sockets that I Have, are all marked: "MTS-4".

 

Ok then M4 it is. As I was saying only used them once since had them and didnt look at the number on the one I used. I thought it would have a notable mark where I used it but did not . I have the set so they are M1 M2 M3 M4 it says on each bit . Its funny I have a 2010 core now and was gonna use it to verify but it still has T50PLUS in it .
Thanks Vorteciroc

 

Is there any reason these bolts have these special heads ? It appears that a regular flanged hex head (like GM uses everywhere else on the engine) would fit . What extraordinary conditions must these bolts support ?

 

It's because tool companies need job security. I am not being facetious.

 

Actually and you can see why , it's easier for a machine to insert and tighten grab the bolt. the Bit will always move right into position without damaging the head.

 

So then why doesn't GM (or everyone else, for that matter) switch everything over to Mortorq?

Or to inverse Torx? Or triple-square? Or tamper-proof Torx? Or SUPER Inverse Torx? Or any of the other stupid head-shapes that manufacturers inflict upon the public?

I don't mind buying a special tool for a special job, but being forced to buy ANOTHER set of specialty sockets just to remove a fastener is bullshit.

 

Oh I understand, But that is what I read in come tech article , Not just for trans but for the bolt style in general , Its made to be machine assembly friendly . The robots are taking over lol.

 

Old post but I need one of these bellhousing bolts that I had to drill the head off to get the BH off.
I do have a set of 4 of these mortorq bits. They are MTS-0 to -4. The -4 fits the 4l65e bolts.
Anybody know the p/n for this bolt? All I can find on eBay or Amazon are torx or hex head bolts.
I want the same as I took out, not a torx or hex head.

 

I have used just a plan old bold in replace of those bolts with no issues. Just make sure that they clear the torque converter.