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Transmissions and Drivetrain Need help with your trans? Problems with your axle?

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Old 07-09-2009, 12:59 PM   #1
Junior Member
 
Join Date: Mar 2008
Location: Lakewood, California
Posts: 38
Car: 1992 Camaro RS 25th Anniversary
Engine: Stock 305 TBI, soon to be 355 LT1.
Transmission: Stock 700r4, but will be rebuilt.
Axle/Gears: GM 10 bolt 7.5 3.73 (rebuilt)

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3.73 Swap, Speed Governor Questions

I could not find an answer using the search. I recently went from a 2.73 to a 3.73 gear ratio. It's quite obvious my speedo will be off. So, when my speedo hits the 110mph mark, it hits the governor, but I'm obviously not traveling at 110mph. It's more like 70 or 75mph. I'm really not sure. I know that I have to swap the plastic gears in the tranny to correct the speedo. With that being said, will swapping the plastic gears allow me to go faster than 70 or 75mph without hitting the governor, or is the governor now at 70 or 75mph because of the 3.73 gear ratio? If the latter of the two situations is true, I know I'll have to remove the governor, but is there anything else I have to do in order to correct this situation?

Any suggestions will be greatly appretiated. Thanks

Car: 1992 RS, 305 TBI, 700r4, 3.73 gears, 275/40/17 tires
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Old 07-10-2009, 11:33 AM   #2
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Join Date: Oct 2008
Location: Logan, UT
Posts: 2,446
Car: '84 Trans Am, &'82 Camaro
Engine: LM7, & 454
Transmission: 4L60E, & 700R-4
Axle/Gears: 7.5" 3.23:1, & none

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Re: 3.73 Swap, Speed Governor Questions

all you need is a 15 tooth drive gear and a 44 tooth driven gear, all the info and part numbers are in one of my stickies. Just getting your speedo gears correct will let you do a true 110 mph.
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Old 07-13-2009, 11:16 AM   #3
Junior Member
 
Join Date: Mar 2008
Location: Lakewood, California
Posts: 38
Car: 1992 Camaro RS 25th Anniversary
Engine: Stock 305 TBI, soon to be 355 LT1.
Transmission: Stock 700r4, but will be rebuilt.
Axle/Gears: GM 10 bolt 7.5 3.73 (rebuilt)

Classifieds Rating: (0)
Re: 3.73 Swap, Speed Governor Questions

Sounds great. Thanks a lot. I was hoping that was all I had to do.
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