T45 with 144K miles grinds on the 4 to 5 sometimes...?

Back2Mustangs · Sep 18, 2004

I don't understand why this only happens sometimes. It may not do it for a day or two and then it might happen two times in one day. When shifting out of 4th into 5th it will grind like the syncro's are not working at all!(you know that good, quick 'skeeetch' noise that sounds like you comletely missed the gear) Thats what I would suspect if it happend every time or frequently, but its only once in a while. I just replaced the clutch, but it did it before and after that. And I have a Tri-Ax mounted on top of it. Is this tranny headed for the big T45 farm in the sky?

Mustang5L5 · Sep 18, 2004

I'm not sure how the t-45 is setup since i have not looked inside one yet, but if it's anything like a t-5, the 5th gear synchro is alone and unique because it uses a brass blocker ring. The brass ring wears out quicker but 5th gear is usually not a gear everyone tries to nail WOT. But it does happen.

Unless there is some prog with clutch engagement, i would say the 5th gear synchro is worn. If you are mechanical, you can drop the tranny yourself and replace it.

Back2Mustangs · Sep 18, 2004

Mustang5L5 said:
I'm not sure how the t-45 is setup since i have not looked inside one yet, but if it's anything like a t-5, the 5th gear synchro is alone and unique because it uses a brass blocker ring. The brass ring wears out quicker but 5th gear is usually not a gear everyone tries to nail WOT. But it does happen.

Unless there is some prog with clutch engagement, i would say the 5th gear synchro is worn. If you are mechanical, you can drop the tranny yourself and replace it.

Thats what I was thinking, but it happens just every so often... I dunno. I don't let anyone do anything to my cars for me unless its something I don't trust myself to do, like installing a cam. Thats something I would rather someone else do, who has done it already once or twice, and be responsible for if it breaks. But if the tranny goes I'll either swap it out with a TKO or T-56 myself

narongc73 · Sep 18, 2004

Back2Mustangs said:
Thats what I was thinking, but it happens just every so often... I dunno. I don't let anyone do anything to my cars for me unless its something I don't trust myself to do, like installing a cam. Thats something I would rather someone else do, who has done it already once or twice, and be responsible for if it breaks. But if the tranny goes I'll either swap it out with a TKO or T-56 myself

When I had a 98 cobra it does it once in awhile also. I think it's normal.

Modular2v · Sep 18, 2004

my buddies 96 cobra did the same thing...then it went out and the only gear we had was 3rd....after we pulled the tranny out and tore it apart it is set up alot liket the t5... the 5th gear synro was alone and broken in half lol

Back2Mustangs · Sep 18, 2004

Modular2v said:
my buddies 96 cobra did the same thing...then it went out and the only gear we had was 3rd....after we pulled the tranny out and tore it apart it is set up alot liket the t5... the 5th gear synro was alone and broken in half lol

Well that is good to know. Maybe getting a new tranny sooner than planned...

T45 with 144K miles grinds on the 4 to 5 sometimes...?

Back2Mustangs

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