5 gear - Ford Mustang Forums

spetsnaz103 · #1 (**permalink**) 11-23-2006, 02:18 AM

my car is an 2003 gt and 5th gear doesnt work anyone no y i heard that its a factory thing but i dont no for sure just wen i get into 5 she doesnt pull at all

cursed99cobra · #2 (**permalink**) 11-23-2006, 03:02 AM

Quote:

Originally Posted by spetsnaz103

my car is an 2003 gt and 5th gear doesnt work anyone no y i heard that its a factory thing but i dont no for sure just wen i get into 5 she doesnt pull at all

Do you have a T45, 3650 or other 5 speed? I had a T45, and the shift forks suck on those! They bend/brake under aggressive shifting, and require a shifter with positive stops to prevent damaging them. It seems a bit late for you unfortunately. If all but fifth gear works, a rebuild may be cheap. A world class T5 isn't very expensive either, and will handle a mildly modified GT.

spetsnaz103 · #3 (**permalink**) 11-23-2006, 10:36 AM

i dont no wat kind it is possible the stock one from the factory and i heard that the reason 5th gear doesnt work is becuase year 2000-up have a chip connected to the computer that prevents it from going into 5th but i dont no for sure i wasnt the one who was told of that

cursed99cobra · #4 (**permalink**) 11-25-2006, 12:11 AM

Quote:

Originally Posted by spetsnaz103

i dont no wat kind it is possible the stock one from the factory and i heard that the reason 5th gear doesnt work is becuase year 2000-up have a chip connected to the computer that prevents it from going into 5th but i dont no for sure i wasnt the one who was told of that

Your vehicle is right on the timeline when Ford switched from the T45 to the TR3650, so it is hard to say which one you have (assuming it is the orginal stock tranny). Here is a website for more info on Ford transmissions....

http://www.smartpartsauto.com/manual...sions_ford.htm

Are you saying that the "chip" prevents the tranny from shifting into 5th all the time, or that this "chip" has suddenly malfunctioned and is now preventing the tranny from shifting into 5th? Either way, this sounds like BS. The only time your ECU should have a "chip" attached to it, is if someone added an aftermarket performance mod. Usually, people just flash tune the ECU in newer Mustangs, the chips are more for the older models. BUT, people do sometimes put chips in none the less. If your are not sure what to look for, take your Stang to a reputable performance shop and have them check the ECU for an aftermarket chip (I still think your problem is internal to the tranny).

As for Ford installing a "chip" to hinder your tranny, no way.

spetsnaz103 · #5 (**permalink**) 11-25-2006, 12:17 AM

it does get into 5th gear but it jsut doesnt drive and my dad is trying to tell me tat he nows wats the problem that the stock chip wont let the car drive in 5 and im like ok watever well she does have perofrmance upgrades

cursed99cobra · #6 (**permalink**) 11-25-2006, 05:14 AM

I still think the chip is not what is keeping you from using 5th. I know that my transmission is "bullet proof" with one small exception....5th gear. The 5th gear is an overdrive gear. It rides seperatley from the other gears and slamming it into 5th (ie racing) could wipe out 5th gear.
Whether or not your tranny is similar, I can not say. Now, the "chip" may have contributed to your trannies demise, but I don't think you will magically pull out this chip and ride off into the sunset.
Try to get everything you can looked at externally first. Once you crack open the tranny (which is about the only real way to find a problem) you will be too far involved money wise not have it overhauled or replaced at that time. If it runs fine in 1-4 now, start pulling together your funds before the whole thing leaves you stranded. Be prepared to spend a few bucks, a repair could cost next to nothing, or they could tell you it needs to be replaced. Swapping one out takes a good shop about a half day for an exact replacement.

Best of luck,

cursed

*notice* this information is offered as a tool to help you solve this issue. It does not replace the need to have a qualified individual diagnose the problem first hand and offer their recommendations for the most reliable or economical repair. These statements are my non-professional opinion based on previous experiences. I assume no liability for the use or misuse of any information stated here.

spetsnaz103 · #7 (**permalink**) 11-25-2006, 11:17 AM

i might go to cottman transmissons to check it out i hear they do a free check up of your trany