M5R2 Transmission
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Senior User
Joined: Feb 2002
Posts: 433
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From: Breckenridge, Minn.
M5R2 Transmission
As some of you know I have intentions of putting the running gear of a T-bird SC in my 50 panel. As I have been driving the T-bird after completing the engine and finding out what else needs attention I have discovered that the tranny has problems. When I first started driving it the first and second gears shifted hard but would go in but now they grind gong in and third is starting to do the same. Other than the car having had a tough life before I got it is there a systematic problem with these trannies and what is it? Should I be looking at the T-56 as discussed in a previous thread? Will a rebuild kit be a good solution as well?
Gear Up
Gear Up
Fleet Owner
Joined: Jul 2004
Posts: 27,294
Likes: 1,055
From: NM
GU, as you may know the M5R2 is a japanese trans (Mazda?) and was only used on the SC's. I just converted my son's '90 SC from AOD to M5R2, and I can tell you it is a nice trannie, but VERY expensive == I paid $10 for a shifter handle shim!! There is a rebuild kit offered by an outfit in Cal. and I believe it is reasonable. I think it is just the blockers and bearings, anything beyond those pieces is mega mega bucks, and Ford doesn't support the trans anymore (over 10 yrs old).
The fact it shifts poorly in 3 gears makes me wonder if your clutch isn't really the problem? The hydraulic set-up on those is notorious for problems, both the slave and the master. Have you got a firm pedal and does it "throw over" half way down? If not, I'd look at the clutch before spending big bucks on the trans.
Are you planning on putting the SC motor in the panel?
The fact it shifts poorly in 3 gears makes me wonder if your clutch isn't really the problem? The hydraulic set-up on those is notorious for problems, both the slave and the master. Have you got a firm pedal and does it "throw over" half way down? If not, I'd look at the clutch before spending big bucks on the trans.
Are you planning on putting the SC motor in the panel?
Post Fiend
Joined: Jun 2001
Posts: 7,493
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From: Erie, pa
The M5R1 and M5R2 are actually Ford Truck Transmissions used from the Ranger/F150 Families. The used them in the SC because of thier strength, unfortunatly they wern't designed for racing.
Do a Google on M5R2 you'll get quite a few hits.
To use another standard tranny with the Bird Engine you'll have to get/make an adaptor.
Do a Google on M5R2 you'll get quite a few hits.
To use another standard tranny with the Bird Engine you'll have to get/make an adaptor.
Fleet Owner
Joined: Jul 2004
Posts: 27,294
Likes: 1,055
From: NM
4TL8, I didn't know that! My only exposure has been thru the SC clubs and the model used there must be different from the trucks' (gear ratios, etc), because they are in a panic over getting support for parts. I'll check that out.
I would go the T-5 route myself, far easier to come by, lighter, and plenty of affordable parts, but it would have to be the 'World Class' Mustang style to last behind a SC motor.
I would go the T-5 route myself, far easier to come by, lighter, and plenty of affordable parts, but it would have to be the 'World Class' Mustang style to last behind a SC motor.
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