How hard would it be to put a manual in my 4r70w?

harry1587

New Member
Mar 31, 2005
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Hey, I have a 2003 GT Mustang with an automatic transmission. My parents bought me the car for me and my mom wanted me to get a automatic and now I am wanting a manual(THANKS mom..lol.) Well anyways I was maybe looking to trading my car in for something similar but there is nothing I can find that I like as much as I do mine. I am attached to my car now which a lot of people on this form can relate too. I was just wondering how hard and how much it would cost to change out my automatic for a strong manual transmission that could later handle a supercharger? I know its been done cause someone on cardomain switched his out for a t56 at modular powerhouse. I asked him about it but never replied. I was just wondering if anyone on here has done it or knows anybody who has done this and if they can give me some help and maybe a price for what this would cost? THANKS everyone!:shrug:
 
I did my swap and it was VERY easy. Total swap cost me $1450. It can be done for less, or if your impatient and not a good shopper, you can easily spend $3,000. The most important thing is to make sure you have everything you need, and that it is the right part, before you start the project. You can sell your 4r70w for 500-900 bucks on ebay. My 90K mile one got me $700.
You will need:
Haynes manual!!!!
Flywheel
Clutch
longer bolts for the 5spd flywheel (dealership)
5spd transmission wiring harness (dealer)
clutch/brake pedal set. I got mine off ebay for $150 shipped
Clutch cable
Go ahead and get an aftermarket clutch quadrant and firewall adjuster. They're cheap, and make clutch adjustment an easy one person job
5spd Driveshaft for your tranny
Tranny (i got a used tr3650 for $500 with 5K miles on it)
shifter (get a nice aftermarket one. I have tri ax and like it.)
Lower shifter boot
5 spd center console for shifter OR use your auto one and glue in a aftermarket shifter boot. Use contact cement. Its what I did. Looks completely stock. and only cost $15.

Removal:

1. Remove exhaust crossover
2.Drain tranny fluid.
3.remove driveshaft.
4. support tranny with a jack and remove the tranny crossmember
5. lower rear of tranny to gain access to mounting bolts
6. remove starter bolts (top one is a pain, get LOTS of extensions/universal joints and thread them through the space just under the pass side engine mount. Do not re-install this bolt)
7. disconnect shift linkage and wiring
8. unbolt tranny from motor
9. support the front of the motor (either by the balancer or under the oil pan)
10. unbolt torque converter and remove tranny
11. remove auto shift linkage
12. remove brake pedal set
13. remove auto tranny wire harness. (the connector is on the pass side firewall just behind the 2 heater hoses that seem to "hump")
14. Remove flex plate

Fab work:
You need to cut out the hole a little bigger for the shifter. I cut off 1/2" all the way around and it fit great.

Install:

1. bolt up flywheel
2. install clutch
3. install wire harness
4. install pedal set and clutch cable
5. Bolt up tranny (shifter removed)
6. install starter (don't use the top bolt)
7. install clutch cable/wiring harness connectors
8. install driveshaft
9. fill tranny with 3.3 qts dextron III fluid through shifter hole
10. install shifter
11. install lower shifter boot. (may require some bending to fit. Fasten to car with small self tapping sheet metal screws spaced 1")
12. adjust clutch
13. install upper boot
14. check everything again
15. Check everything AGAIN
16. Start car and check the following: clutch function and adjustment, reverse lights, listen for noises.
17. if all is good install cross over pipe and your done.

I would HIGHLY suggest the use of a lift and tranny jack.
This can be done without a lift, provided you can support the car on jackstands/ramps high enough to slide the tranny out from under the car. Make sure you have lots of friends to help.

Took me 10 hours, working slowly, taking a beer break every hour:D

Any questions, feel free to ask.
 
wow, im impressed. That pretty much covers it all. I dont know if I have enough mechanical know how to take on that big of a project. Having done the work yourself what do you think a shop would charge for all that work besides and arm and a leg...lol? If you arent worn out from that project and want to tackle another one on my car that would be cool too...haha, THANKS for the posts everyone!
 
hey 02laserred2v, you are the person I saw on cardomain! $5,000 is about what I expected and isnt that bad for all that you got done. I love all the stuff you have done to your car. I am planning on getting a kenne bell and hopefully converting it to a manual too, dont know how soon thats gonna be but well see.... I was wondering how you like the 6speed t56 transmission and the kenne bell supercharger? Also, wheres a good place to buy a t56? And lastly did u sell your automatic and whatd u get for it? THANKS for the post everyone!:hail2:
 
how come its not worth it? Too much money? Last reply, I looked at the transmssion. It looks good, if I decide to keep an automatic and need a strong one ill look into that more, thanks
 
If your car has minimal mods, you're better of selling or trading it for a manual. The reason why I went with the swap is because I've already put a lot of $$ into mine. I got my t56 kit from D&D Performance. My auto ended up in the garbage because it was pretty much done. I'm amazed I was able to drive it 150 miles to MPH to get the swap done, considering the shape it was in.