Broke my second 300m shaft
Broke my second 300m shaft I have now broke my second 300m billet shaft in my 4l80. The setup Is a 427 TT, circle d 5 discs lockup converter,4l80 with Tci manual valve-body with trans brake. The first shaft broke on a 3 to 4 shift blowing the tires off on the street. The next shaft broke in front of my house on the trans brake @4000rpm's.... I have been buying the shafts from patc transmission and at $400 bucks it's getting kinda expensive...... Any thoughts ?
I hate to say this but that shaft looks like a factory shaft. Can you take a picture of the front of the shaft that goes into the converter? I want to see the area where the hole is on the end of the shaft. Also do you have your TCC applied when you are shifting? I have seen this break shafts in the past. Just a thought. Vince
Edit.....Also take a pic of the end that broke where either there is a set screw or check ball installed. This will be the end that is installed in the forward drum.
Edit.....Also take a pic of the end that broke where either there is a set screw or check ball installed. This will be the end that is installed in the forward drum.
Last edited by FLT; Oct 31, 2010 at 10:09 PM. Reason: Thanks Jake!
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Vince,
You are probably correct,
all the billet shafts I've seen have a set screw in the rear hole.
The ones I use look totally polished, CKs look similar to stock and PATC uses/sells CK parts.
Did you ever get a chance to test the transbrake?
I've got new 4L80E seperator plates made as well.
You are probably correct,
all the billet shafts I've seen have a set screw in the rear hole.
The ones I use look totally polished, CKs look similar to stock and PATC uses/sells CK parts.
Did you ever get a chance to test the transbrake?
I've got new 4L80E seperator plates made as well.
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Verdad Gallardo Good point Jake. I did edit my above post to get pic's of both ends! 
As for the brake no I have not had a chance yet. Just need to get caught up so I can spend some time to test it against the "other". The one issue IMO is the low starting position that we discussed a while back. I did see the plates on the bullet! 
As for the brake no I have not had a chance yet. Just need to get caught up so I can spend some time to test it against the "other". The one issue IMO is the low starting position that we discussed a while back. I did see the plates on the bullet! 
