727 starter ring gear needed

[69”WannaBee”451]

Does anybody know where I can get a replacement starter ring gear for a 10.75” 727 converter? Sonnax shows one, part number CH-RG-130, but can’t seem to find a provider for their parts. I don’t want to junk an expensive converter for a broken starter tooth.

 

[pnora]

1972 DODGE CHARGER 5.2L 318cid V8 Ring Gear | Shop Now at RockAuto

 

[69”WannaBee”451]

1972 DODGE CHARGER 5.2L 318cid V8 Ring Gear | Shop Now at RockAuto

None of those are correct. Those have a 12.162” inside diameter. I need a ring with an 11.19” inside diameter.

 

[pnora]

None of those are correct. Those have a 12.162” inside diameter. I need a ring with an 11.19” inside diameter.

What is the converter out of?

 

[69”WannaBee”451]

It’s an aftermarket Coan.

 

[pnora]

It’s an aftermarket Coan.

Did you call Coan? They have always been good to me. Why did you not buy the Sonnax one? That CH-RG-130 shows to be in stock at summit racing.

 

[69”WannaBee”451]

The one in stock at Summit is the CH-RG-130T, which is for a 12.162” inside diameter. I need a ring with an 11.19” inside diameter. The “T” in the part number is the difference.

 

[ruffcut]

Why not send the converter in and have it repaired?

 

[69”WannaBee”451]

I already removed the ring gear from the converter. Only one tooth needs to be repaired. I’ll weld it up and file it. The ring gear isn’t hardened like the starter gear is. Been done many times. Just thought I’d ask if anyone knew of a source for a replacement ring.

 

[pnora]

I already removed the ring gear from the converter. Only one tooth needs to be repaired. I’ll weld it up and file it. The ring gear isn’t hardened like the starter gear is. Been done many times. Just thought I’d ask if anyone knew of a source for a replacement ring.

What did Coan say about buying one from them?

 

[OKDart]

None of those are correct. Those have a 12.162” inside diameter. I need a ring with an 11.19” inside diameter.

There are 4 ring gears and 2 different sizes, click on the info tab and the ATP ZA505 shows 11.19 inside diameter.

 

[69”WannaBee”451]

There are 4 ring gears and 2 different sizes, click on the info tab and the ATP ZA505 shows 11.19 inside diameter.

That’s a 122 tooth ring. Mopars A/LA and B/RB use a 130 tooth.

 

[OKDart]

That’s a 122 tooth ring. Mopars A/LA and B/RB use a 130 tooth.

I don't think that'll make a difference. Not 100% sure though.

 

[69”WannaBee”451]

I don't think that'll make a difference. Not 100% sure though.

It’ll make a huge difference. I’d like for the starter to engage.

 

[pnora]

It’ll make a huge difference. I’d like for the starter to engage.

Did you call Coan???? That might me a special ring.

 

[69”WannaBee”451]

Did you call Coan???? That might me a special ring.

I found a joint in New York that has the correct one. I’ll weld up my existing ring, and pick up a new one as a spare.

 

[OKDart]

It’ll make a huge difference. I’d like for the starter to engage.

Look at the starter bendix, lots of room for different tooth counts. This isn't like a splined shaft.

 

[69”WannaBee”451]

Look at the starter bendix, lots of room for different tooth counts. This isn't like a splined shaft.

In over 50 Mopars I’ve built, restored, owned, and raced, I have never had anything but a 30 tooth starter ring. I appreciate your input.

 

[OKDart]

Manual transmission flywheels have 4 different tooth counts according to Year One. Does that mean there's 4 different starters to go with each one?
https://www.yearone.com/Catalog/chr...-tooth ring gear, 13.56,add them to your cart.

 

[69”WannaBee”451]

Manual transmission flywheels have 4 different tooth counts according to Year One. Does that mean there's 4 different starters to go with each one?
https://www.yearone.com/Catalog/chrysler.b.body/transmission/flywheels-_-ring-gears#:~:text=143-tooth ring gear, 13.56,add them to your cart.

I’m not talking about stick cars. Capisce?