If you have an AUTO with 4.10's, PLZ READ

hey droptop hes been trying to find out if theres anyway to tell the computer into shifting at certain rpms??? like what the handheld tuners do to 99-04s?????

 

I did mine this past summer. I used the Ford Racing ring and pinion set. I also used new pinion nut, crush sleeve, shims(i had to reshim), and friction modifier to add to my rearend oil. I used a speed cal to adjust my speedo. Everything worked out good :thumb:. I was going to get a hand held tuner to adjust my shifts, but I guess It doesn't work like droptop said. I would also like to know how to adjust shift points. I just shift manually when i race.

 

Yes I do.........but it doesn't redline. It does very good in town shifting. I thought i would run into problems but it shifts just like it did when i had the 3.27's in it.

 

If you want it to shift harder, get the Transgo Shift kit. Put that beootch in Drive, slam on it, and it chirps tires changing from 1st to 2nd gear. Sometimes it feels like my axels are gonna break lol.

 

[And you're SURE there were no other mods done besides just putting the gears in? Well this is what I wanted to hear. I can see someone spending the $ on a handheld to change shift points and putting the time and money in to the JMOD for the track, but I really don't have that money right now; and I also wont be racing the car in the near future (unless I go to a test and tune or something, but that would only be maybe once this summer).

What RPM's does it shift at in WOT? City? I don't see how it could be exactly the same as the 3.27's when the 4.10s would bring you to that certain RPM so much quicker. From what I've read, our tranny/computer is programmed to change gears at a given TIME, not a given RPM. Using totally random numbers, this would mean if it took 5 seconds to redline/shift at WOT with the 3.27's, then WOT with 4.10's would only take 4 seconds to get there. So that extra second would bring your RPM's that much higher (rev limiter....eeeeek). Maybe I'm way out in left field here.

Please, can anyone else out there share their experiences?? It would really help verify this for me.
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I would say it shifts at around 5700 or 5800 at WOT(I'm guessing) same as it was with the 3.27's. I have hit the rev limiter manually shifting it before it just cuts out, nothing bad yet. In the city it shifts good. You will love the swap. Everything will be OK......I wouldn't worry about it :boink:

 

i have an auto and just went from 3.08 to 3.73s...and my bros auto went to 4.10s...im pretty sure the computer adjusts itself somewhat.. you dont need the jmod or anything... will a tuner that makes the shifts harder do the same as a shift kit?..my brothers tuner made his car shift like a shift kit...

 

just put in my 4.10s in my auto had no shift prob at wot i changed the speedo gear to adjust the speedodmeter but as far as the shifting it shifted at 5900 to 6000 rpm hope it helps and it will have fun

 

well my car has always shifted at 5500 rpm at WOT, never changed.....

 

man, i would just do the gear swap and a jmod or other shift kit. Also, if you want your tranny to last, get a big trans cooler and some really good oil. Also, if i was u i would put on a torque converter. but thats just me, and the gear shouldn't be anything to install man, just unbolt and replace if remember correctly

 

I have 4.30s in my auto, and I havent noticed a difference between my shift points on my old 3.55s . It shifts at the same point with both gears....Definately need to get a shift kit though.

 

I have an 04 GT Ah-toe. I put in the Motive 4:10's and got a diablow for the tune and the speedo adjustment, but i diddnt bother with the shift points. dont see any reason to.
mine shifts about 200 past redline when at WOT just like it used to.
pulls like a sumbitch too.
:dancing6:

 

wow how do youall make those images at the bottom of your screan? thansk