27 spline - 28 spline posi G80
02-01-2007, 10:33 PM
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Car: 82 camaro berlinetta
Engine: 350
Transmission: 700R4
Axle/Gears: 2:73
27 spline - 28 spline posi G80
i bought a g80 with a 28 spline and i think i have a 27 spline axle. Is this going to cause any problems?
Also what kind of gears should i install? i was thinking 3.73 but i have overdrive so i was thinking 4.10's. I dont race a whole lot and it would be nice to drive on the highway. Theoretically i was thinking the overdrive would kick the 4.10s down to the 3.90s or 3.80s in regular driving conditions.
Also what kind of gears should i install? i was thinking 3.73 but i have overdrive so i was thinking 4.10's. I dont race a whole lot and it would be nice to drive on the highway. Theoretically i was thinking the overdrive would kick the 4.10s down to the 3.90s or 3.80s in regular driving conditions.
02-01-2007, 10:47 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
No such thing as a 10 bolt with 27 spline axles. Up to 1989, the axles are 26 spline. In 1990, GM changed the axles to 28 spline.
The 7.5" 10 bolt has a 27 spline pinion but that has nothing to do with the axles.
My daily driver truck has a 4L80E transmission and 4.10 gears but my tires are also 28" tall compared to a car size of only 26" tall.
The 7.5" 10 bolt has a 27 spline pinion but that has nothing to do with the axles.
My daily driver truck has a 4L80E transmission and 4.10 gears but my tires are also 28" tall compared to a car size of only 26" tall.
02-02-2007, 12:00 AM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
G80 is just an RPO code for a posi.
If the posi carrier is for 28 spline axles then you can't use your 26 spline axles (82-89 third gen with a 10 bolt). You'll either need to find some axles from a 90-92 third gen or buy some aftermarket ones. If the posi carrier is for 26 spline axles then it will bolt right in.
If the posi carrier is for 28 spline axles then you can't use your 26 spline axles (82-89 third gen with a 10 bolt). You'll either need to find some axles from a 90-92 third gen or buy some aftermarket ones. If the posi carrier is for 26 spline axles then it will bolt right in.
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