Need help with 4-point (!!) Torx on Bellhousing
#1
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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":
![Name: Torx4-point.jpg
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Size: 572.7 KB](https://ls1tech.com/forums/attachments/automatic-transmission/613477d1501334371-need-help-4-point-torx-bellhousing-torx4-point.jpg)
A link to where to buy such a socket would be much appreciated.
Thank you.
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":
![Name: Torx4-point.jpg
Views: 7522
Size: 572.7 KB](https://ls1tech.com/forums/attachments/automatic-transmission/613477d1501334371-need-help-4-point-torx-bellhousing-torx4-point.jpg)
A link to where to buy such a socket would be much appreciated.
Thank you.
Last edited by mrvedit; 04-24-2012 at 01:39 PM.
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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.
#3
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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.
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.
#5
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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.
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.
#7
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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.
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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.
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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.
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#12
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The 3/8" -Drive Sockets that I Have, are all marked: "MTS-4".
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Last edited by vorteciroc; 01-04-2024 at 11:12 PM.
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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
Thanks Vorteciroc
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Last edited by FranksCustomTrans; 01-05-2024 at 10:01 AM.
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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 ?
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vorteciroc (08-06-2024)
#16
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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.
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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.
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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.
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.
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vorteciroc (08-07-2024)