Ring Gear

[JMD68RSSS]

Who sells "thick" ring gears so that you can run a 3 series gear ratio on a 2 series carrier.

I want to run 3.55 or 3.73 on a 2 series posi? Any help is appreciated.

Thanks,

[derekf]

Summit's got some, or Mr. Gasket makes a spacer so you can use a regular 3 series gearset.

[chicane67]

DO NOT USE a ring gear spacer in a performance application.

Not to mention... that the only way you will be able to do this with any GM differential (with the exception of the 7.5") is to use a ring gear spacer... or to change out the complete differential carrier, meaning, posi - limited slip - torque sensing - locker... etc etc.

It is most likely best that you cahnge out the differential for a new unit not only for the correct flange offset but to a stronger unit as well. Depending on the differential you have... the land speed racers are always looking for 2 series carriers/posi's... so you can sell what you have to re-coupe monies for what you really need.

But... To answer your question correctly, the first time around... which differential and which POSI are you refering to ??

[JMD68RSSS]

It is a 8.2" Eaton posi out of a 1968 Nova w/ 2.73 gears.

I have read the spacers are not a good idea. But I have been unable to locate a place selling "thick" gear for the for this 2 series carrier.

Thanks.

[derekf]

Summit's got one set of gears - 3.73s, if memory serves, that fit a 2 series 8.2 carrier.

[JMD68RSSS]

I called Summit and Randy's Ring and Pinion, neither carried a Thick gear for the 8.2" GM rear end.

From talking to the tech line, for my application, a spacer would not be too bad. Street driven car, flashlight drags once or twice a year and less than 400 HP.

If anyone knows of a vendor, please let me now. Could you weld the spacer to the ring gear?

Thanks,

[derekf]

This looks to be a thick gear for the 8.2:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=STR%2DRS01882373C&N=700+4294925134+4294918962+4294785191+4294901307+ 4294895863+115&autoview=sku

"Gear, Ring and Pinion, 3.73:1 Ratio, GM, 8.2 in., 10-Bolt, 2 Series, Set"

[JMD68RSSS]

Yes it does. Thanks for the link. I might have thought the Tech line could have found this.

[chicane67]

I called Summit and Randy's Ring and Pinion, neither carried a Thick gear for the 8.2" GM rear end.

From talking to the tech line, for my application, a spacer would not be too bad. Street driven car, flashlight drags once or twice a year and less than 400 HP.

If anyone knows of a vendor, please let me now. Could you weld the spacer to the ring gear?


This looks to be a thick gear for the 8.2:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=STR%2DRS01882373C&N=700+4294925134+4294918962+4294785191+4294901307+ 4294895863+115&autoview=sku

"Gear, Ring and Pinion, 3.73:1 Ratio, GM, 8.2 in., 10-Bolt, 2 Series, Set"

That is because what you are looking at is a type-o. USGear/Strange does not make series swap gear sets for the 8.2". Never have... never will.

So, in short... they are not available through any manufacturer/vendor... unless you have them made. You got 8k laying around ??

And no, you can not (should not) weld a spacer to the ring gear. Nor would I recommend that you beat on them at the street/flashlight races. If the chassis never hooked up and you didnt pound the trans... they will live... but its a gamble either way.

[JMD68RSSS]

Chicane67,

I am certainly a novice in this area. But the gears derekf posted the link to say they are for a series 2 carrier. Why would these not work?

And, if I had $8k laying around, I would not be asking these questions to work with my next to nothing budget.

Thanks for the input.

[chicane67]

... But the gears derekf posted the link to say they are for a series 2 carrier. Why would these not work?

Because it is a type-o. What Summit is advertising... does not exist. They do not make a two series, 3.73 gear set.

They have never produced a two series 3.73 gear set... and they never will.

:cheers: