1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

rx-3 rear gears

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Old 10-28-10, 04:48 PM
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rx-3 rear gears

has anyone used rx-3 ring&pinion out of 72 to 75 3.700...and are they stronger or weaker than the 1st gens......?
Old 10-29-10, 08:38 AM
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I havent seen or noticed anything bad with the RX-3 gears as well as the 1st gens 3.90. However, the GSL-SE gears are weak, i've seen them with missing teeth.

Now for the $1MM question: what are trying to accomplish?
Old 10-29-10, 11:07 AM
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i am trying 2 get more topend.....because am running against vtec's.....am killing them in 1/8 mile street race....1/4 mile????????????? i think i need little more uptop..i have 3.90 now.
Old 10-29-10, 11:25 AM
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i doubt they'll be much difference between the two. u want the lower gear when drag racing anyway. i personally have never done the 1/4 mile but at the end of it u might be nearing the top of 4th? ur not racing for top end, it's how quick u get out the hole and hold that lead. why do u think drag racers use gearing as high as 5.13?
Old 10-29-10, 07:48 PM
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higher than 5.13 but will require a ford 9"
Old 10-29-10, 07:51 PM
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Originally Posted by rx71king
i am trying 2 get more topend.....because am running against vtec's.....am killing them in 1/8 mile street race....1/4 mile????????????? i think i need little more uptop..i have 3.90 now.
say 4.80 and up will be good for track use BUT freeway speed will suffer.


There is a big difference between running at the track VS street racing. At the track, you need slicks, not street tires
Old 10-29-10, 10:30 PM
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i rarely go to the track...last time ran . i was at red line in fourth gear before the end of my run. with 4.80 al haft to go in to fifth gear.some thing iz not right.i am going to swap tranmission..because the one i have in my car i bought it from a road racer. may be different gear inside.
Old 10-30-10, 09:43 AM
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What transmission do you have in there..??? For instance, if you have a 12A trans, switching to a 2nd gen TurboII trans could help out top end. There's a chart I think at Mazdatrix that lays out all the stock gearings in comparison.
Old 10-30-10, 04:19 PM
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Originally Posted by 85TIIDEVIL
What transmission do you have in there..??? For instance, if you have a 12A trans, switching to a 2nd gen TurboII trans could help out top end. There's a chart I think at Mazdatrix that lays out all the stock gearings in comparison.
what up jim...i have se box . before i put this one in .i had a defference se trans in and it was total different .,,,,.. i have a turbo 2 trans . i am saving it so win i do not have anymore n.a. ****.
Old 10-31-10, 04:07 PM
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What's up Joe..? That's what I'm doing tooo... I have about 5 n/a transmissions. I want to break them all before I put the TurboII back in. If you want to try anyone I have come pick it up.

http://mazdatrix.com/faq/ratios.htm
Old 10-31-10, 06:23 PM
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Changing your overall tire diameter will have the same effect as changing your gears too. Keep that in mind before trying a more expensive option.

I would think 3.70 gears from a RX-7 would probably have thicker (beefier) gears.
than a GSL-SE.
Old 10-31-10, 07:12 PM
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Originally Posted by Directfreak
Changing your overall tire diameter will have the same effect as changing your gears too. Keep that in mind before trying a more expensive option.

I would think 3.70 gears from a RX-7 would probably have thicker (beefier) gears.
than a GSL-SE.
yeah i'd do taller tires too
Old 10-31-10, 08:00 PM
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also your tires will make a big different if you dont hook up fast you wont jump the dumb front wheelers off the line.
Old 10-31-10, 08:14 PM
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Originally Posted by Directfreak
Changing your overall tire diameter will have the same effect as changing your gears too. Keep that in mind before trying a more expensive option.

I would think 3.70 gears from a RX-7 would probably have thicker (beefier) gears.
than a GSL-SE.
i have 55 15 now ... what size iz good u think ?
Old 10-31-10, 08:25 PM
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Originally Posted by 85TIIDEVIL
What's up Joe..? That's what I'm doing tooo... I have about 5 n/a transmissions. I want to break them all before I put the TurboII back in. If you want to try anyone I have come pick it up.

http://mazdatrix.com/faq/ratios.htm
swap meet this weekend............call me let me no what's up...
Old 10-31-10, 08:32 PM
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not just the tire size the compund makes the difference i have a set of 4 Nitto Nt555R drag radials and i love them they hook up so fast!
Old 10-31-10, 10:14 PM
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Originally Posted by Man_in_black49464
not just the tire size the compund makes the difference i have a set of 4 Nitto Nt555R drag radials and i love them they hook up so fast!
no drag radials for me...i will start breaking rears and transmissions...
Old 11-01-10, 09:42 PM
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Ease into getting on it off the line instead of dumping clutches at 7K+ Drag radials will def help hook and book and the stock stuff will hold up.
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