Gears help!

the5.ohh · Jun 7, 2013

Looking to buy the 3.73 Gears Kit from you guys. I have an automatic 1995 Mustang GT with the stock 2.73 gears. Want to upgrade to 3.73s but was told the speedo will be off by 5-7% or something like that.. What else will I need to make the speedo accurate? Speedo gear / drive gear? I'll be getting the following
Ford Racing 3.73 Gears
Ford Racing Friction Modifier
What gear oil do I need? All i see is for manual trannys on your site. Need help to clear up my confusion lol, thanks!

Jarrod@latemodel · Jun 10, 2013

You can go with this kit and it has everything in it you will need for the gear change.
http://www.latemodelrestoration.com/item/LRS-4209FRB-K/Mustang-88-373-Ratio-Rear-End-Gear-Kit

To correct the speedo, buy this kit and it will fix your problem.
http://www.latemodelrestoration.com...-95-Mustang-Speedo-Gear-Kit-T5-With-373-Gears

sweet94GT · Jun 10, 2013

On the topic of gears, I have a t5 with 3.90 gears. I have yet to find a place with the correct speedo gear. Previous owner installed them, didn't change the speedo gear

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Jarrod@latemodel · Jun 10, 2013

I don't have a speedo gear for the 3.90 gears. Its going to have to be a 3.73 or 4.10 speedo gear unfortunately.

krazyrabbit · Jun 10, 2013

Jarrod@latemodel said:
To correct the speedo, buy this kit and it will fix your problem.
http://www.latemodelrestoration.com...-95-Mustang-Speedo-Gear-Kit-T5-With-373-Gears

How about a 1996 auto with the 4.10 gears? All the speedo gear speed correction kits I saw state up to '95, do they also work for the '96-'04 as well?

Jarrod@latemodel · Jun 10, 2013

No, you will need a speed-dial adjuster.

http://www.latemodelrestoration.com...Speed-Dial-Speedometer-Adjuster-M-4209ADPT-AC

rz5.0 · Jun 10, 2013

Jarrod i didn't think those gear kits worked on a aode?

the5.ohh · Jun 10, 2013

Jarrod@latemodel said:
You can go with this kit and it has everything in it you will need for the gear change.
http://www.latemodelrestoration.com/item/LRS-4209FRB-K/Mustang-88-373-Ratio-Rear-End-Gear-Kit

To correct the speedo, buy this kit and it will fix your problem.
http://www.latemodelrestoration.com...-95-Mustang-Speedo-Gear-Kit-T5-With-373-Gears

Yeah but that says T5, for the speedo correction. I have the AODE.

sweet94GT · Jun 11, 2013

Jarrod@latemodel said:
I don't have a speedo gear for the 3.90 gears. Its going to have to be a 3.73 or 4.10 speedo gear unfortunately.

The gears that were in it prior to being swapped were 4.10. It's about 10 off til you hit 45 in actual speed, then it's ~15-20 off. Sound like it has one of those speedo gears, or does that sound like the gear is still stock?

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Jarrod@latemodel · Jun 11, 2013

the5.ohh said:
Yeah but that says T5, for the speedo correction. I have the AODE.

Sorry, I read your first post as your car being a T5. It was to early in the morning on a Monday for me to be thinking. lol. I dont have a speedo gear that will work for a 95 auto car that has 3.73's. You will have to use this.

http://www.latemodelrestoration.com...Speed-Dial-Speedometer-Adjuster-M-4209ADPT-AC

sweet94GT said:
The gears that were in it prior to being swapped were 4.10. It's about 10 off til you hit 45 in actual speed, then it's ~15-20 off. Sound like it has one of those speedo gears, or does that sound like the gear is still stock?

It could have a gear in it. Its hard to say though. For a 3.90 gear, you could run the FRPP adjuster that I linked the5.ohh too.