faster shifts with less teeth and power capacity - TCCoA Forums

 
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post #1 of 11 (permalink) Old 08-10-2016, 04:52 PM Thread Starter
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faster shifts with less teeth and power capacity

Hi folks

as the headline states: faster shifts with less teeth on blocker rings

true or not ,worth or not good or bad like to hear from you guys ,also who knows the power and torque number for real what you can put on these transmissions ?


like to hear from you guys


hoschy
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post #2 of 11 (permalink) Old 08-10-2016, 06:08 PM
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I don't think it'll do squat for power capacity, once in gear the synchronizer is mated to the dogs on the gear, the blockers are just along for the ride. There does seem to be more ease in shifting in some applications, Ford had a lot of TSBs on the early Tremec TR3650s related to second gear, and one of the solutions was just that, shaving the dogs on the second gear blocker.



I think however this is a solution primarily bred from the use of brass lined blocker cones rather than carbon fiber like 3/4/5/R, and M5R2s originally were carbon fiber all the way through though, unless you replaced them with F150 anyway.

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post #3 of 11 (permalink) Old 08-10-2016, 08:32 PM
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Mike Puckett on SCCoA makes carbon fiber lined blockers. If you have the M5R2 apart, put those in, and you won't have any shifting issues. As for how much torque they can actually withstand, multiple people on SCCoA have run over 400ft-lbs through them for long periods, and I have yet to hear of any actually failing due to too much power.

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post #4 of 11 (permalink) Old 08-11-2016, 04:42 PM Thread Starter
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Originally Posted by MadMikeyL View Post
Mike Puckett on SCCoA makes carbon fiber lined blockers. If you have the M5R2 apart, put those in, and you won't have any shifting issues. As for how much torque they can actually withstand, multiple people on SCCoA have run over 400ft-lbs through them for long periods, and I have yet to hear of any actually failing due to too much power.
Hi guys
The internet is full of numbers between 300 and 600 ft/lb, just not a number ford itself put out .
But brings me to the point to ask is there somebody here in tccoa who tinkert enough with a m52r to put up a sticky what to look for on a tranny ,example if the blockers look like brass the carbon is worn of, so need replacement,and so on which then refers to the rebuild page we have here. that would be cool. i got one from the junk jard but don*t know the condition so a sticky like this would help to figure the condition out .
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post #5 of 11 (permalink) Old 08-11-2016, 04:56 PM
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If the blockers look like brass it means the blockers are made of brass You can't however tell what the liner inside the blocker is made of unless you fully disassemble the gears from the main shaft, it's common to have brass rings with paper or carbon fiber liners, that's what the M5R2 uses. The way to tell if the liner is worn off is the same as it is with any synchronized transmission - if the blocker ring can physically touch the gear dogs, the liner is worn down - The liner is inside the blocker ring and rides a cone attached to the gear, so brand new or in good condition they should sit off the gear by a few mm.

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post #6 of 11 (permalink) Old 08-12-2016, 11:04 AM
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Basically if there is a lot of play in the rings they are probably toast. You are looking for a gap where the green arrow is on this pic:



Here is a video I made of mine. Notice how 2nd gear (2nd from the back) has more play than the others. This is the one most prone to failure from what I understand. I had Dalke and Puckett both watch this and they said these look ok.

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post #7 of 11 (permalink) Old 08-12-2016, 04:11 PM Thread Starter
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thank you so much jco that is awesome with the video.

so i they have play like this time to replace them??? i guess i gotta check mine

the thing with cutting teeth of is a racer trick story which i try to debunk any idea there??


thx again for the video

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post #8 of 11 (permalink) Old 08-12-2016, 04:24 PM
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A little play is fine, what you don't want is so much play that the blocker ring actually contacts the gear like you see in the pic above the video, if that happens it can't slow down the gear to match the revs and you'll get hard/slow/grinding shifts in that gear.

Like I said earlier, with carbon fiber lined blockers cutting teeth really isn't necessary. It's an old racer trick for old school transmissions.

-Matt
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post #9 of 11 (permalink) Old 08-13-2016, 12:53 PM Thread Starter
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Originally Posted by XR7-4.6 View Post
A little play is fine, what you don't want is so much play that the blocker ring actually contacts the gear like you see in the pic above the video, if that happens it can't slow down the gear to match the revs and you'll get hard/slow/grinding shifts in that gear.

Like I said earlier, with carbon fiber lined blockers cutting teeth really isn't necessary. It's an old racer trick for old school transmissions.
Thank you so much,that gives me enough information to get a closer look on mine.
i found a website-- M5OD Transmission Sale | M5R2, M5ODR2, Bronco, F150, F250 looks like they got some parts to improve the weak points i will give them a call next week and report here if there is any good stuff available for our tannys

thanks again


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post #10 of 11 (permalink) Old 08-15-2016, 09:51 AM
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If your syncro rings are against the gear like the pic with the arrow, you need to replace them. "Play" might not have been the best word as they will have some movement. But if there is no gap there then it's not doing it's job to slow down the gear for the shift (as Matt was saying).

Check out https://cobratransmission.com/

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post #11 of 11 (permalink) Old 08-15-2016, 05:38 PM Thread Starter
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Quote:
Originally Posted by jco1385 View Post
If your syncro rings are against the gear like the pic with the arrow, you need to replace them. "Play" might not have been the best word as they will have some movement. But if there is no gap there then it's not doing it's job to slow down the gear for the shift (as Matt was saying).

Check out https://cobratransmission.com/
hi jco ,i can possibly check them out this weekend,if not hell breaks lose again at work

we are so busy ain*t funny,but i will check that so i can plan properly many thx for all the help i got from you guys i appreciate that a lot

hoschy
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