What Trans?
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Joined: Apr 2011
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What Trans?
Hey everyone. I got an 90' F-150 with a 4.9L and a M50D transmission. I'm looking for a performance trans that will almost bolt up to the engine. Not worried about the pocket book. So if you have any suggestions or some experience, it would be greatly appreciated.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
OK... that's a strange request. What good is a transmission that almost bolts up? What am I missing here? 
The Good news is that the 300I6 shares a bellhousing bolt pattern with the 5.0 and 5.8 V8's so there are lots of other transmissions that will bolt up just fine including the Mustang T5 and all those 5 and 6 speed aftermarket Tremec gear boxes. Now what use that is going to be to you with a 150hp farm tractor motor I don't know, but who knows maybe you have nitros and a blower strapped on it or something so who am I to judge.
The Good news is that the 300I6 shares a bellhousing bolt pattern with the 5.0 and 5.8 V8's so there are lots of other transmissions that will bolt up just fine including the Mustang T5 and all those 5 and 6 speed aftermarket Tremec gear boxes. Now what use that is going to be to you with a 150hp farm tractor motor I don't know, but who knows maybe you have nitros and a blower strapped on it or something so who am I to judge.
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
Likes: 27
From: Eastern Ky
As for the request, yes, I agree....1st time I have EVER heard of something asked for, that ALMOST will fit...
Second-Will the T-5, etc bolt up (I know the bellhousing, etc will work)
But what of the-
Driveline
Crossmember
Clutch setup (I know those are cable style, which eliminates the fluid setup)
Basically...I'm curious, as I know where a TON of mustangs are...And my tranny is gettin'....Worn out...
As for the shifter location, how will all that, work out in the truck...I know most mustang tranny's has a rear mounted shifter....Just wondering..
Postmaster
Joined: Dec 2007
Posts: 3,052
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From: Jacksonville FL
lol performance 4.9?
Anyways. The Tremec TKO600 is what a few of gen 1 lightning guys used.
http://www.nloc.net/vbforum/gen-1-li...lots-pics.html
T5 wouldn't last long. Trucks are too heavy.
You could always put a hurst short throw shifter in the M5OD.
Anyways. The Tremec TKO600 is what a few of gen 1 lightning guys used.
http://www.nloc.net/vbforum/gen-1-li...lots-pics.html
T5 wouldn't last long. Trucks are too heavy.
You could always put a hurst short throw shifter in the M5OD.
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
Likes: 27
From: Eastern Ky
lol performance 4.9?
Anyways. The Tremec TKO600 is what a few of gen 1 lightning guys used.
5-speed Conversion Complete (long...lots of pics) - The National Lightning Owners Club Inc
T5 wouldn't last long. Trucks are too heavy.
You could always put a hurst short throw shifter in the M5OD.
Anyways. The Tremec TKO600 is what a few of gen 1 lightning guys used.
5-speed Conversion Complete (long...lots of pics) - The National Lightning Owners Club Inc
T5 wouldn't last long. Trucks are too heavy.
You could always put a hurst short throw shifter in the M5OD.
As for the manual stuff...I have the ****ty M5OD....And well...Right now, I think pushing a plunger handle around in a bucket of #57 gravel sums up the whole feel of my shifter....
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
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From: Eastern Ky
On another note...Is there a way to externally mount the Slave Cylinder?
Fabbing a support, etc isn't my issue...Just, if I'm gonna have to be stuck with this thing, might as well make it accessable...
Fabbing a support, etc isn't my issue...Just, if I'm gonna have to be stuck with this thing, might as well make it accessable...
Elder User
Joined: Dec 2002
Posts: 559
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From: South Carolina
You may have bad shifter bushings or worn out parts in the tower, neither of which is expensive or difficult to repair. Is there anything else wrong with the transmission?
There's always the NP435 if you don't mind trading overdrive for a cast iron case, or the ZF if you can find one. If you're not doing heavy and continuous towing, I have found the M5R2 to be a fine truck transmission. Besides the aggravation of the slave cylinder and a set of shifter bushings, it has given me no problems.
There's always the NP435 if you don't mind trading overdrive for a cast iron case, or the ZF if you can find one. If you're not doing heavy and continuous towing, I have found the M5R2 to be a fine truck transmission. Besides the aggravation of the slave cylinder and a set of shifter bushings, it has given me no problems.
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FTE Chapter Leader
Joined: May 2009
Posts: 8,843
Likes: 27
From: Eastern Ky
You may have bad shifter bushings or worn out parts in the tower, neither of which is expensive or difficult to repair. Is there anything else wrong with the transmission?
There's always the NP435 if you don't mind trading overdrive for a cast iron case, or the ZF if you can find one. If you're not doing heavy and continuous towing, I have found the M5R2 to be a fine truck transmission. Besides the aggravation of the slave cylinder and a set of shifter bushings, it has given me no problems.
There's always the NP435 if you don't mind trading overdrive for a cast iron case, or the ZF if you can find one. If you're not doing heavy and continuous towing, I have found the M5R2 to be a fine truck transmission. Besides the aggravation of the slave cylinder and a set of shifter bushings, it has given me no problems.
And no, I wouldn't mind dropping 5th....I live in the foothills of the Appalachian Mountains.....Not really a LOT of cruising to be done, because quite frankly, there's no room for it...lol
As for pulling/hauling...I don't do it REGULARLY....But when I do...OH BOY is it a load....Last load I hauled with the truck was a 16ft dual axle trailer, and a 1976 Dodge 1 ton dually.....11,360 lbs when I passed the scales...
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Elder User
Joined: Dec 2002
Posts: 559
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From: South Carolina
The cheap and easy option is one of the 4 speeds then - that's an easy fix! I don't think the t-5 would last very long doing truck duty. You should be able to find an NP 435 at a very good price! And you get rid of the internal slave cyl...
Lead Driver
Joined: May 2011
Posts: 5,772
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if youre not worried about the pocket book, a t56 is what i'd put in (if by "performance" you mean rippin around bangin gears). it'll hold up to power, and youll have good cruise manners.
i dont laugh at the idea of a performance 4.9. . .ive seen some nasty turbo 300 powered vehicles. 300's generally hold up better to boost vs a 302 and a 351 (out of the box of course). he'd be the one laughing, more times than not, if he was runnin aorund with a turbo'd 300 6 spd combo.
i dont laugh at the idea of a performance 4.9. . .ive seen some nasty turbo 300 powered vehicles. 300's generally hold up better to boost vs a 302 and a 351 (out of the box of course). he'd be the one laughing, more times than not, if he was runnin aorund with a turbo'd 300 6 spd combo.
Senior User
Joined: Feb 2010
Posts: 443
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From: Bear, DE
The mustang T-5 will bolt up, but it won't last long at all. I've broken 3 of them when I was at 300hp in a 2900lbs car. They are not strong at all in stock form. Aftermarket T-5's are better, but the Tremec is what you want if you want a strong 5 speed. My built tremec 3550 is holding 500+ tq no problem.
Good old T-5:
Getting back to topic.. if you have a "healthy" 300 I-6, upgrade to the ZF-5 or build up the M5OD. The 5 speed thunderbird super coupes come with the M5OD and they have 300 ft lbs of torque from the factory..
Good old T-5:
Getting back to topic.. if you have a "healthy" 300 I-6, upgrade to the ZF-5 or build up the M5OD. The 5 speed thunderbird super coupes come with the M5OD and they have 300 ft lbs of torque from the factory..
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