HUGE Announcement for TR-3650 owners.... - Ford Mustang Forum
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post #1 of 40 (permalink) Old 07-16-2010 Thread Starter
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HUGE Announcement for TR-3650 owners....

We are set to release a brand new offering for T45/Tr-3650 transmission owners and users.

As most of you know, the TR-3650 is a 360ft/lbs rated gearbox with a deep 1st gear and a wide gear ratio. It is a bolt-in replacement on the 1998 + up Mustangs with the T45 so this effects a lot of you out there.

The stock 3650 ('01-'04) comes with 3.38 1st and a .67 5th which most of you know makes running a 3.73 rear gear (or deeper) a challenge as you run out of 1st gear almost as soon as you get going.

We are now offering built transmissions with brand new gearsets that are capable of handling 800hp and features a taller 2.90 1st gear and will end in either a .57 or a .53 5th gear. With the closer gear ratios, higher rpm shifting will be easier and more consistent.

It is an entirely different 2nd - 4th gear kit that can be placed in either the 2001-2004 or the 2005 and up 3650's and will support up to 800hp. Plus, it will convert the 1st gear ratio to a 2.90! The overdrive is modified due to the different tooth count on the gears, which actually makes 5th gear either a .57 or a .53 depending on your current overdrive in the factory transmission. If your stock 3650 has the .67 5th, with our new gear set, you would end up with a .57, if your current O/D is the .62, you would end up with a final ratio of .53!

The upgrade would require a 26-spline clutch disc as the input is only available in 26-spline configuration to be able to support 800hp without twisting the splines. You would re-use the stock bell housing, shifter, cross member and driveshaft.

These will be ground cut gears so they will be a little more noisy than the OE transmission but we will be introducing a Helical cut gear in the near future which would reduce the noise to OE levels.

These will be available with a warranty and we have done extensive testing on it with nothing but positive results.

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post #2 of 40 (permalink) Old 07-16-2010
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Very interesting, just curious on a rough price for the 3650

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post #3 of 40 (permalink) Old 07-16-2010
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I'm game. What's the price?

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post #4 of 40 (permalink) Old 07-19-2010 Thread Starter
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We are still working out the details but figure $2500. In the scheme of things, putting a TKO in your car would run you about $2800+ and it is not as strong as this is going to be and with the preferred gear ratios of the new 3650, it's a win win situation for everyone.

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post #5 of 40 (permalink) Old 07-19-2010
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I would be willing to try to break one for you......

I'm always good at tearing up drivetrain.

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post #6 of 40 (permalink) Old 07-19-2010
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will anything be done about the notchy nature of the 3650 Richard? I personally think the T-45 is a smoother shifting Tranny..
I'm liking that .53 5th gear, running 4.30's in a 4V Cobra will be a breeze!

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post #7 of 40 (permalink) Old 07-21-2010 Thread Starter
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The "notchy" nature of the 3650 is a product of the design. The 3650 is what we call a multi-rail linkage system. That means there is 1 shift rail for the 1-2 shift fork, a 2nd rail for the 3-4 shift fork and a 3rd rail for the 5-R shift fork. Then you have yet another rail that runs into the tail housing and the shifter is connected to it.
This means when shifting, you are using 2 and sometimes 3 rails to get into a particular gear. The multi-rail system is going to be notchy feeling. By the way, the TKO's are a multi- rail system as well.

The T5, T45 and T56 are a singe rail linkage system. All 3 shift forks hang from 1 main rail and the shifter itself is connected to this rail. This makes these transmissions smooth shifting....

As for the new 3650 gear set, it is still a multi-rail system (no way around that without re-designing the whole transmission) but we do some trick work to the shift lugs on the rails to improve shift quality. Also, with the closer gear ratios, it is able to shift at a higher rpm more consistently than the factory gearbox.

Resident manual transmission/driveline guru :hihi:
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TKO, T45, 3650, T5 & T56 Transmission Systems
2199 Summerfield Rd
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post #8 of 40 (permalink) Old 08-22-2010
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If you need someone to break a trans for you, I'm your man. Seems I just toasted my T45. Would it be possible to buy the parts from you to rebuild it myself? Also the gear set sounds like a great option, I'd really like to look into doing that, between the longer 1st, closer ratios, and the better overdrive it sounds like a winner. Especially the overdrive. Unfortunately there is no way I can afford $2500, I may end up having to do this myself. I sent you a pm, talk to you soon buddy.

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post #9 of 40 (permalink) Old 08-22-2010
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Does this new first gear fix that damn lockout of 1st gear from downshifting until 2000 rpm or 15mph (whichever the car seems to feel like that day.)?
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OK, what gears should I put in now, 4.11 or 4.30, if I'm going to do these new tranny gears next year? AM has them on sale right now for $160. Thanks, 01 Vert Cobra

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4.30 is going to be a bit too much for a stick IMO. 4.10's would be as high as i'd go

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Sweet. My 3650 has given me grief shifting 1st 2nd 3rd for over a year. I keep waiting for it to blow entirely, and I gotta hand it ... it's holding up well.

Stupid syncros. A new syncro kit and install from ford - 2800$ ... I just did the math, this new TR3650 sounds sweet.

Will they be direct fit into a 2003 GT ... I'm assuming since I'm already running a TR3650.
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What are all the gear ratios?

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When are the trans going up for sale? My Bullitt is in need of a trans.
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Bell Housing Included?

Sounds cool.....and I was actually considering it - assuming this is a direct change out for the TR3650. You say to "re-use" the bell housing? But the the TR3650 bell housing is part of the transmission cast (which is one of the MAJOR downfalls of this trans). So........

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