Gears & Axles - Correcting speedo for 4.11's without affecting custom tune??




ziominix
03-08-2008, 06:38 PM
I've got 4.11's in a 93 TA however the car has a 94-95 pcm so I should be able to plug in with a handheld tuner and correct the gear ratio. Whats the cheapest one that will allow me to correct this without affecting the custom tune?


Black02SLPSS
03-08-2008, 07:32 PM
Yes any handheld tuner can do that for you. On price im not sure what the cheapest on is per say but you would do good to check ebay or the classifieds for them. Im sure you wont need anything fancy if thats all your wanting to do.

ziominix
03-08-2008, 07:56 PM
Yeah the car already runs great and has been dyno tuned for its modifications, I just want to fix the speedometer but not affect anything else.


BlackScreaminMachine
03-09-2008, 01:50 PM
No, you need to get the correct speedo gear still. OR mabey a digital speedo box.

ziominix
03-09-2008, 05:40 PM
Still need the gear? Care to point me in the right direction as to finding one? I'm sure one of our fine sponsors carries what I need, or someone else.

Black02SLPSS
03-09-2008, 10:14 PM
I dont think there is a speedo gear. Its all digital now and days

uphigh07
03-09-2008, 11:04 PM
i think you can go to your dealer and have them hook up the tech II and can change the ratio for next to nothing or if you no somebody that works at one do it on the weekend, it takes no time at all!

ziominix
03-12-2008, 07:29 PM
I'm a salesman at a GM dealer, and was talking to our techs about it. Their computers can only set what was a factory option, so 4.11's aren't a choice. :(

BlackScreaminMachine
03-13-2008, 10:38 AM
http://www.transmissioncenter.net/speedometer_calibration_______va.htm#700r4

OR

http://www.transmissioncenter.net/speedometer_calibration_______va.htm#era

http://www.geocities.com/crosley_az/700spd.htm