Gear / speedo change

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Jun 16, 2005 | 05:14 PM

jwt1603

Thread Starter

Melting Slicks

Joined: Mar 2005

Posts: 2,352

Likes: 230

From: Northeast FL

Gear / speedo change

I'm planning on getting a set of 4.10s for my 94 six speed soon. Right after the headers, cats and exhaust. From what I read on here you can't just change the drive gear on the trans to get the speedo to match, the computer has to be reprogrammed. Is that correct? Do I have to spend the money to buy the Hyper Tech programmer just for that or is there another way to do this? That seems like a lot of money to spend for one small program change.

Jun 16, 2005 | 07:35 PM

CFI-EFI

Race Director

Joined: Sep 2000

Posts: 17,298

Likes: 33

From: The Top of Utah

Slap in a 45 tooth, light blue, driven gear, part number 25513052 and don't tell anyone where you got this info. Shhh

RACE ON!!!

Jun 16, 2005 | 08:24 PM

VenkmanP

Safety Car

Joined: Apr 2003

Posts: 3,793

Likes: 9

From: VA

For under $100 you can get tunercat and a cable and have a much better programming tool than the hypertech.

Jun 17, 2005 | 07:47 AM

jwt1603

Thread Starter

Melting Slicks

Joined: Mar 2005

Posts: 2,352

Likes: 230

From: Northeast FL

Thanks guys.

I went to Tuner Cat's website. WAY too techy for me. Said you have to be very familiar with closed loop systems, talked about flash programming messing up the ECM if you have the wrong software on your computer, etc. While I know what those things are, I'm not familiar enough with them to take a chance. Too much hassle and opening the door for disaster it seems.

Besides, I don't have a lap top and my PC is a good fifty feet from the garage. Cable, if I could find one that long, would cost a fortune.

I think I'll just change the drive gear in the trans and maybe buy the Hyper Tech since people have said it's pretty easy to use and I'm only doing light mods to the car.