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-   -   4.10 hardware with 3.73 software... (http://www.wranglerforum.com/f274/4-10-hardware-with-3-73-software-251748.html)

WonderJeep 06-25-2013 07:27 PM

4.10 hardware with 3.73 software...
 
Just wondering.... what if you had a 4.10 rear end but 3.73 software was accidentally loaded, how would the tranny react?

Anyone ever experience this or have any idea of what it would feel like?

tab22092 06-25-2013 07:35 PM

Quote:

Originally Posted by WonderJeep (Post 3899143)
Just wondering.... what if you had a 4.10 rear end but 3.73 software was accidentally loaded, how would the tranny react?

Anyone ever experience this or have any idea of what it would feel like?

Kaboom! You need to change that now! Just kidding i have no idea lmao. In guessing itll just change your shift points a little.

WonderJeep 06-25-2013 07:45 PM

LOL... i wouldnt be surprised if it could explode...

You think it would shift sooner or later? Where are the tranny experts?

jrussblues 06-25-2013 08:51 PM

It will change the shift points slightly and throw off the speedometer and odometer slightly

Tweak 06-25-2013 08:54 PM

My jeep came with 3.73s and programmed for 3.21s. Shift points were the big deal, drove 10 times better after I reprogrammed. Speedo and mpg gauge were off. I was getting 21mpg on 37s LOL

WonderJeep 06-25-2013 09:24 PM

Quote:

Originally Posted by Tweak (Post 3899434)
My jeep came with 3.73s and programmed for 3.21s. Shift points were the big deal, drove 10 times better after I reprogrammed. Speedo and mpg gauge were off. I was getting 21mpg on 37s LOL


In your case, did it shift earlier or later? A lot of gear hunting?

THW 06-25-2013 09:50 PM

Quote:

Originally Posted by Tweak (Post 3899434)
My jeep came with 3.73s and programmed for 3.21s. Shift points were the big deal, drove 10 times better after I reprogrammed. Speedo and mpg gauge were off. I was getting 21mpg on 37s LOL

How did you find out it was programmed for 3.21s?

Tweak 06-25-2013 09:53 PM

Quote:

Originally Posted by WonderJeep (Post 3899544)
In your case, did it shift earlier or later? A lot of gear hunting?

shifted later. in order to down shift coming up a hill I had to mash it pretty good.

Tweak 06-25-2013 09:55 PM

Quote:

Originally Posted by THW (Post 3899629)
How did you find out it was programmed for 3.21s?

for some reason my jeep came brand new off the dealership floor with a hypertech programmer just chilling in the glove box. I thought it had 3.21's so I left the gearing page at "STOCK" when I got bigger tires and upped the tire size in the system. one day I got bored and requested my build sheet, turns out I had 3.73's. it had no towing package or anything. guess I got lucky.

THW 06-25-2013 10:08 PM

Quote:

Originally Posted by Tweak (Post 3899657)
for some reason my jeep came brand new off the dealership floor with a hypertech programmer just chilling in the glove box.

Really?

Tweak 06-25-2013 10:18 PM

Quote:

Originally Posted by THW (Post 3899734)
Really?

yup! It had 33's on it, think they may have included it for that reason.


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