My 1994 GT Mustang Aode to T5 Conversion w/PICS!

Yeah, that happened to me when I replaced the tranny in my '86 the first time around. Guy told me it was a good "no grinders!" tranny out of his "bone stock 5.0". Turned out that it was a 4-cyl T-5 which ground in third and fourth. I ended up saving up my pennies and buying a WC T-5 after that. At least now I know more about them, so I probably wouldn't repeat that mistake. Probably...

Congrats on getting it back on the road! Video?
 
  • Sponsors (?)


I can feel from the pedal that it is right on the money, and 1st, 3rd and 5th work perfectly, so if the clutch was out of adjustment, then all gears would have the same problem, wouldn't you agree? Nah, it's definately synchro's gone south.

I have a perfectly good 5.0 T5 sitting in my shed, I just like the really low gears of the 4 cyl T5's! And if I use the V8 trans, I'll have to change the pilot bearing which will necessitate pulling everything back off again.
 
Yeah, IIRC, the 4-cyl T-5 has a 3.97:1 1st as opposed to the V8's 3.25 (?). I don't remember the exact number. However, I do believe that the 4-cyl internals aren't as strong as the V8 tranny internals. I can't remember where I read about that, but I'm pretty certain that's the case. My '86 has 3.55s along with the 4cyl tranny, and it would pull about 3k rpms between 65 and 70mph.
 
Yeah, IIRC, the 4-cyl T-5 has a 3.97:1 1st as opposed to the V8's 3.25 (?). I don't remember the exact number. However, I do believe that the 4-cyl internals aren't as strong as the V8 tranny internals. I can't remember where I read about that, but I'm pretty certain that's the case. My '86 has 3.55s along with the 4cyl tranny, and it would pull about 3k rpms between 65 and 70mph.

Damn nice writeup!!!!

Actually, the "internals" are exactly the same, except for the gear ratios. Since the 4 bangers have 1st gear ratios that multiply by either 3.97/1 or 4.10/1, the torque INPUT that the trans can handle is lower. V8 trannies have either 2.95/1 or 3.35/1, so they don't have as much leverage to break internal parts of the trans.

Say you have a smallblock that produces 300# of torque. When you multiply that by 2.95, you are putting 885 # of torque through that gear set.

If you multiply the same 300# by 4.10, you are putting 1230# of torque through that gear set.

If the "max torque" that the gear material could safely handle was say 900#, then the max torque you could put into the gearset is about 215#. Which would be about the same torque through the material as the 2.95 gear and 300#.

Too "wordy"?
 
Yeah man, makes alot of sense! My car is still pretty much stock right now so I figured the 4 banger trans would be sufficient and would add a little to the SOTP feeling! And it does, just has bad synchros. I may just replace them if it's as easy as that, but if I have to press gears off and such, I'll be more likely to just install the V8 t5 I have. I just don't want to go all the way back to the motor to get the pilot bearing changed!

I was hoping this trans would hold till I put my Exploder motor in.
 
Damn nice writeup!!!!

Actually, the "internals" are exactly the same, except for the gear ratios. Since the 4 bangers have 1st gear ratios that multiply by either 3.97/1 or 4.10/1, the torque INPUT that the trans can handle is lower. V8 trannies have either 2.95/1 or 3.35/1, so they don't have as much leverage to break internal parts of the trans.

Say you have a smallblock that produces 300# of torque. When you multiply that by 2.95, you are putting 885 # of torque through that gear set.

If you multiply the same 300# by 4.10, you are putting 1230# of torque through that gear set.

If the "max torque" that the gear material could safely handle was say 900#, then the max torque you could put into the gearset is about 215#. Which would be about the same torque through the material as the 2.95 gear and 300#.

Too "wordy"?
Slightly verbose, yes, however, makes tons of sense. Thanks for clearing that up! :nice:
 
Well, it turns out the other T5 I have is not a V8 one at all, but a SVO TC 4cyl transmission. I went ahead and installed it and the car drives like a dream now, nice and smooth. No more grinding gears!

Mission accomplished!
 
I've seen a few people having issues with the mounting situation and I noticed I didn't do any pics of the mounting plate mods, so I made a little diagram of what to do to the AODE hanger plate:

T5modifyplate.jpg
 
A little correction for you. The T4MO computer pulls timing between shifts the U4P0 does not. You are correct about being able to correct it with a tuner and shut the auto tranny functions off. The pulling of the timing is actually called " tip in retard." How did your swap go?
 
The swap has been done for about a year now, this is an old thread! lol

And I'm not sure if it's "timing" that the U4PO or W4HO ecm is pulling, but if you try to use one with a 5 speed car it will have a huge hickup/backfire as you are accelerating. I've been there, done that. When the auto computers think it's time to shift they either pull timing or fuel between shifts. I know it backfires when it does it, but I can't remember if it's through the intake or exhaust.
 
Well, I got all my parts rounded up so I figured I'd do alot of people a favor and document my progress on this swap.

I've done about 6 of these swaps so far (foxes and SN95's)so this will be cake for me.

For my swap, I'll be using a Fox T5 transmission and bellhousing. This is fine as long as you use bell and trans together from a fox. I do this because 94/95 parts are getting more scarce by the day and there's not alot of aftermarket support for items like transmissions and bellhousings, etc. Using Fox parts ensures that I'll have a much larger supply of new and used parts for the future. And I'll show in the end that the shifter isn't all that bad, matter of fact, after a few days with it you won't even notice it anymore. Also, there are little plates you can get to move the shifter handle back a little to compensate.

I'm also going to show how to use your automatic block seperator plate instead of locating and purchasing a T5 plate.

So, if you're looking into doing this swap, follow along and enjoy. :D

First, you'll want to get your car as high as possible. A lift is nice, but most of us don't have that luxury. :nono:

DCP_0072.jpg


After I lifted the car up, I prepared to swap the pedals out. I highly recommend taking out the driver seat! If you try this with the seat in place, you're neck will be cursing you for days! :nonono: There's 2 15mm nuts and 2 15mm bolts holding the captain's chair in place.

DCP_0075.jpg


DCP_0076.jpg


DCP_0077-1.jpg


Man, is that carpet discusting! :eek: I'll have to rectify that situation before reassembly for sure. Look there! Found some money! :D I found a grand total of $1.76 :nice:

Ok, with the seat out of the way you'll want to put a piece of cardboard over the studs or they'll stick right into your back! Not good times at all. Now, you'll want to go under the dash with a 8mm socket and remove the trim panel under the steering wheel. Once that is removed, there may or may not be a black steel shield behind the trim panel. Again, 2 8mm bolts hold it in place.

When the black shield is gone, you'll see a steel brace with a slight curve to it, and once again, 2 8mm bolts hold it on. After that is out of the way you can see exactly what you're working with.

Now, before you go under the dash you'll need to be prepared because once you're situated and comfortable under there, you're not gonna want to get back out to get tools. So here's a list of what to take with you:
Needle nose pliers
13mm short well socket w/swivel and extensions of various size
10 mm short or long well
3/8 Ratchet
Flat screwdriver
13mm Wrench
Assortment of Torx bits (can't remember if it's a T50 or T45)

Now get situated under the dash. First thing you do is make sure your steering is locked. Then you'll take the torx bolt out of the steering shaft/knuckle. Then remove the 13mm bolt holding the knuckle to the steering column. Now take the steering shaft that goes through the floorboard and push it down into the floor as far as you can get it, then remove the knuckle. Don't forget to remove the little floor vent elbow, it get's a little annoying! There's a spring and a disk with a bunch of little holes in it that will probably fall off the column shaft. Just remember how they go back on, disk then spring then knuckle.

Then, you'll see a yellow retainer clip holding the brake shaft/brake light sensor to the brake pedal. Pull the clip with needle nose and use your screwdriver to pry it off. Pay attention on how it all comes apart so you can get it all back together correctly. It seems kinda intimidating at first, but on the reassembly it'll come to you. Now, push in the retainer tabs on the sensor with the vacuum hose (cruise) and pull it away from the pedal assy. Tuck it back away somewhere. Then remove that little white plastic clip thing that's attached to the brake pedal itself. It'll get in the way of the next step if you don't!

Next, take your short 13mm and use it with your swivel and extensions and get the 4 nuts that hold the clutch pedal assy. to the firewall. Then get the 10mm bolt that goes through the top of the pedal assy. Now remove all the plugs and wiring that's still attached to the assy. You should be able to pull the assy free now. Take your time and it'll come right out.

DCP_0079.jpg


DCP_0080-1.jpg


DCP_0081-1.jpg


DCP_0082.jpg


Now that you have the pedals out it's time to get the 5 speed pedals ready to install. Do yourself a favor and purchase an aluminum double hook quadrant and firewall adjuster. However, DO NOT buy any aftermarket cables! They brake and are 99% of the time JUNK! :shrug: Your choices for a cable are a new/used OEM cable or a Maximum Motorsports cable.

Here I have pictures of the stock crappy plastic self adjusting setup and with my new Steeda setup:

DCP_0083.jpg


DCP_0084.jpg


DCP_0085.jpg


Now, get back under the dash with your clutch pedal assy. and manuver it into place. This will try your patients a little, but keep at it, it WILL go in! Then you'll be left with this:

DCP_0086.jpg


The experienced SN95 guys will probably notice that my clutch pedal assy. is the wrong one, it's out of a 96 up car evidently. I can tell because there's no where to install the cruise control cancel switch! False advertisement on the part of the seller, failure to properly inspect the part on the part of the buyer! (no pun intended) Anyway, it'll work fine for me since I'm going to ditch my cruise anyway.

It's a good idea to leave the panels and pieces under the dash disassembled for now. Soon you'll be back in that area to remove the shift interlock device when you pull your shifter out.

So im gonna be doing this, but Im not converting from an auto to man. So I wont have to take all this out, right? I I have an aluminum quadrant, it looks to me like maybe I could just take the pins out of the side and take plastic off and put alum on? I know its not gonna be that easy