Hello, just joined today and I am looking for some info. I have a 2007 Mustang. It has some mods, mostly related to handling, heavier sway bars. etc. The issue I have with the car is that I would like to find, if such thing exists, a manual gearbox with a higher 1st gear or at least closer ratios. It seems like I go about 20 feet in first gear and have to shift. Is the 6 speed transmission any better, and/or is there a different one that will do it???? I would also like to install somewhere around a 3:50 rear gear, but that will make it worse unless I just start out in 2nd gear??? More questions to follow for some other mods.....thanks for any info, it is greatly appreciated!!!!!! M

 

if you go to a taller rear end ratio, like 3.31, that will make first gear taller, and all of the rest of the gears taller too ... it won't make the ratios closer though .... I had 3.31 in my 2010 when I first got it, for the street I definitely like 3.31 better than the 3.73 rear I have now.

you could swap to the TR6060 6-speed transmission (from a GT500) and I believe that has closer ratios in the transmission; but you'll still need to adjust the rear end ratio to give you the effective 1st gear that you are looking for, and it is a big expensive job

 

Thanks Bert, I have a 3.31 in the rear now. I guess closer ratios is a half truth in my case...I said that because the old toploader had a higher first gear in the close ratio {so-called "big block" toploader} version than the wide or small block toploader and was hoping there might be a trans that would work today. Thanks again, I will look into the first gear ratios of mine and the 6060. M

 

https://www.steeda.com/mustang-manua...smission-guide

 

05stangkc, thank you sir, that is exactly the info that I need. I am gonna guess and say that the 6060 will bolt right up to a 4.6 block??? Thanks again, it is greatly appreciated!!!!! M

 

I believe it does, but it's worth a search. I know people have done TR6060 swaps before.

There's also the T56 Magnum XL, which is based on the TR6060. D&D Performance sells the transmission as well as a complete install kit (including a new driveshaft because the tail on the magnum is a lot longer than on the TR3650).

https://www.ddperformance.com/ba77-2...all-kit-05-up/

The Magnum XL comes in two different sets of gear ratios, one with a 2.66:1 1st gear, one witha 2.97:1, both of which are longer than the 3.38:1 in the 3650. I have the 2.97 and I think the ratios are spot on for a 300 - 400 HP 4.6. The consensus at the time was that the 2.66 gearset was really more for supercharged cars with gobs or torque that could overcome the longer ratios. I originally had the 6th gear swapped out to the one from the 2.66 (0.5:1) but it was way too tall. I ended up sending the transmission back and got the normal set for 2.97:

2.97 1st, 2.1, 1.46, 1, 0.8, 0.63 6th
Interestingly on D&D's site, they list the 2.66 as coming with a 0.63:1 ratio in 6th gear. But Tremec's website still lists the 0.50:1

I'm running 3.73's and love the the 2.97 gearset. It always feels like I'm in the right gear and never feels like I'm bogging the engine down unless I go up 2 gears. Plus the T56 just has a really nice shifter feel, very direct and mechanical feeling. I can't speak to the TR6060 but it looks like it uses a similar semi-remote system to the 3650, which while not bad (especially w/ urethane bushings) I don't think comapres to the T56. Tremec has a great comparison about what's different between the two:

https://tremec-blog.com/the-differen...-6060-6-speed/

 

Thank you, Cavero for the info. I did already decide that the XL magnum would be the way to go. I was, however, thinking about the 2.66 version....seems like 3.31 rear and 3.38 first, which is way too low in my car, would not be a lot different than 3.73 rear with 2.97 first......I was planning a 3.55 rear gear swap too. Remembering when the old toploader "wide ratio" was a 2.78 first gear and it worked great in the 289 with 271 HP. If I remember right the High Performance 289's from 65/66 came with a 3.50 rear. But you are saying, and don't get me wrong I believe you, that a 2.97 with a 3.73 is the way to go. I might have to re-think things.......mostly just trying to get away from that damned granny first gear in the 3650. thanks again, M

 

I Had a 2007 GT/CS with the 3.55 and a Roushcharger. First Gear Was Even More Brief With the Blower! Pretty Much Punch it and Shift Before Even Thinking! Btw The 427 Horsepower Was Just Right! Worked Well With Here in Commiefornia Where Most Mods are Verboten!

KC

 

05stangkc, so you are saying the 2.66 with a 3.55 or 3.73 might be a little better as far as getting away from that granny first but still be a decent performer???? Thanks. M

 

I Think with the Money Involved With What You are Trying to get Away From You Could Supercharge & Have Money Left Over and Just Have to Get Used to a Fast 1-2 Shift. Performance Benefits By Supercharging Will Far Outweigh Any Gained By Gears and or 6 Speed. I Far Preferred My Gt/Cs As Far as Ease of Drivability Compared to my 07 Gt-500. First gear In the 500 is So Traction Limited as Well. I Just Preferred the Way The Shifting Overall was in My GT/CS. The 427 Horsepower Level is Just Right For the Stock Engine as Far as Limits to Durability. The Roushcharger is No Longer Available I Believe But Other Options with Similar Hp Should be Out There.

As Far as the Gt-500 Stock Setup I Hate The Stock Dual Disc Clutch as You Can Never Feel Confident Pulling Away From the Stoplight as it Tends To Make You Over Rev Because it Feels Like it is Going To Stall. Other Gt-500 Owners I Have Spoke to Say The Same Thing! That is With 3.31's Now Realize I'm talking Specific Stock Gt-500 Six Speed Setup. Here is a Quirk Though The Gt-500Kr With 3.73 Gears Does Not Feel Like That. I Have Driven One and What a Difference. Perhaps Irrelevant in Your Case But Worth Mentioning.

Sorry if Not the Answer you were Seeking But Wanted To Share Real World Experience I Had With My Gt/Cs & Shelby.

Here is My Impressions Early On With Both My Cars Mentioned.

https://themustangsource.com/forums/...harged-455003/

KC

 

Thanks again for the info, I did read your other posts that you linked above, and I agree with you. I hate to sound wishy washy, but for the first time in several weeks I got a chance to drive the Mustang today. This time I paid more attention to a hard fast "hole shot" type first gear acceleration than idling in a parking lot first gear driving situation. I have to say that I can stand the hard acceleration with a fairly quick shift as is, but that yanking back and forth of way too low a gear in first if you are just trying to get out of the driveway is just not tolerable. Maybe there is something else wrong with the car, I wish I had another one to drive and see.
When I started researching what to do about this, I stumbled onto a company that offers a "better" set of 1,2,3 gears for the TR-3650. It has a 2.97 {??} first gear, all new American made bearings and gaskets and the better stronger input and output shafts. This set up is less than half the price of a XL Magnum. That coupled with a 3.55 gear might just be the ticket.
This car really is a blast to drive and it keeps me from running up the miles on my AC Cobra. Maybe with the money I save going this route I will do a brake upgrade. Thanks again for the info Kevin, M

 

Realize How Different a Beast Your Cobra is Vs The Stang and Drive the Stang Only For Awhile. You Are So Conditioned to the Cobra You May Just Need For Lack of a Better Word Bond With the Stang and See if you Can get Acclimated to the Stang Driving Feel. And Yes Driving Another Similar Car Would Be a Great Idea to Make Sure Something is Not Amiss. I would Be Curious If the Car Actually Still Has the 3.31s Or Maybe You Have Something Lower Already.

EZ to Check the Figures Here. Be Advised Though If Changed The Speedo May or May Not Have Been Corrected. If Your Phone Can Check Speed That Can Work. Or The Old Chalk & Driveline / Wheel Rotation Method.

https://themustangsource.com/forums/...ulator-549545/

KC

 

You know, that's a good point....I will definitely check the rear gears. The car only has 62K original miles on it. It does have a posi-traction differential now {I did check that yesterday} and was always garage kept. It also has numerous high performance handling aftermarket items too. Shocks, both traction bars, traction bar mounts are billet aluminum, etc. But the axle appears untouched...gasket looks to be original and the little paper sticker is still on the cover. If I remember correctly didn't all these have limited slip??? I am in the process of ordering a Wave Trac differential and 3.55 gears, so I think it's a good idea to check the gears and make sure I am not ordering something I already might have!!!
I am getting a weird coast noise coming from the rear, which is strange given the mileage...maybe it does have gears and they weren't set up properly??? One things for certain....I will find out soon!!!! M

 

Something I Hesitated Mentioning is How Hard it Seems To Be To get a Properly Set Up Gearset. One That Does Not Make Noise or Prematurely Wear Out! Bad Gears and or Bad Install It's Such a Can o Worms And I Know From Working Dealerships Over The Years That You Were Lucky if You Had 1 or 2 Tech's That Could Do it Properly! IT IS NOT A DRIVEWAY JOB For The Novice and I Have Heard Enough Stories on Here as Well.

Going From 3.31 to 3.55 Will Not Be Much of a Change Especially for The Money & Aggravation. Now 3.08 to 3.55 Yes a Moderate Change, 3.31 to 3.73 a Moderate Change 3.31 to 4.10 A Big Change. But I Would Want to Be Sure What I Really Had. Just My Opinion Friend after Years of Threads on Gear Changes and Years of Ring & Pinion Jobs Going South in the Shop! If it's Funtioning Well I Would Be Really Sure Before Doing. If I Had Known I Was Going To Roushcharge My GT/CS I Would Have Likely Stuck with the 3.31's.

Now IF the Gearset Has An Issue and is Going South Then The 3.55 Is Not Going To Cost Anymore. Anyhoo I Would Check For Sure What You Have.

As I Said BTMO!

Maybe Just As Well Remove The Cover & Do A Visual! Axle Bearing Play Could Be Checked Easy Enough at the Same Time. Unless You Wanted to Pull the Axles & Really Check Closely.


KC.

 

Well, the end of the big mystery.....this car has a 4.11 gear!!! No **** wonder 1st feels like a big truck granny gear. Next move is gonna be to see which differential is in it and do a little "exploratory" surgery. By the looks of this rear and the rest of the car I am very surprised anyone changed gears. I mean, it has a lot of add ons, but the rear sure appears untouched. All I can say is they must have swapped out the gears right after the car was purchased. The guy I bought it from was the second owner and he never mentioned the rear being a 4.11{4.10??? since it's an 8.8} Will keep updating this thread as I get into this thing. Thanks again Kevin!!! M

Edit: I understand about the gears getting set up right. Been doing it a while and what I find is that the lash is usually too tight. I always give it extra and haven't lost one yet.

 

No Wonder You Had The Short Shift!

Glad The Mystery is Solved!

KC

 

Yeah obviously you found you have 4.11's now, but going back to 3.31's, yeah the ratio of the stock 3.38 1st gear with a 3.31 final drive would be basically the same ratio as the 2.97 Magnum w/ 3.73's. I should've plugged that in when I was looking at it.

You could find a local shop to swap it out to something more reasonable like 3.73's or 3.55's. I started w/ stock 3.55's, then swapped to 3.73's on the TR3650 when I had to replace the gears anyway for a whine (the Bullitt's use 3.73's too BTW). I definitely like the 3.73's better than 3.55's. Quicker acceleration without the ultra short 1st gear you're having to deal with.

Attached is something I rigged up back when I was getting the T56 done. You can play with the final drive ratios and tire size and see where all the RPM vs speed falls out. There's probably better ways to do it, but it worked alright for me.

 

Thank you sir, it is greatly appreciated......getting ready to head out on a hunting trip. Nothing is working for me with this Mustang so it's time to go shoot something!!! I just found out that G-Force no longer makes the close ratio gear set for the 3650 and Wave-Trac does not make a locker to fit it.....have to re-think this whole Mustang mods thing. Probably will get drunk too......thanks again, M

 

Well, that explains a lot!

I guess we should have thought to poke at that earlier .... so now your quandary is, what gears to put in?

My experience with 2010 GT: I liked the 3.31 gears better for street driving overall, than the 3.73 that I have now. Yes, the 3.73 does make the car more responsive and feel quicker/lighter for "frisky" driving; but in normal driving 3.31 is more comfortable, takes advantage of the torque of the V8, lets you stretch out each gear a little more and shift less. But the 3.73 is better for maximum performance driving; for example on road track it keeps the RPM's way up on the powerband and that's generally a good thing on the track .... but I never drive like that on the road.

I'd go with 3.55 in my car if I didn't care about the cost of making that small change from what I have now; so that's what I'd suggest for you.

 

Yes sir, but I have to say that the rear does not appear to have been touched.....the car, when I got it had 62K and I maybe put a couple hundred more on it since. Looking at the rear itself, the gasket and cover and cover bolts have definitely not been touched in a long time. This car had to have had the 4.11's added not long after it was bought. This is why I believed it to be the factory gears still installed.
The hits keep rolling in with this thing...I just found out that Wave Trac doesn't make a locker for it either. I was all set to order one of those, but no. Time to fall back and re-group I guess. I'll be offline for a few days and think about this thing. I will post what my next "attempted" move is. Thanks agian for all this info and advice!!!! It is always greatly appreciated!!!! M