[V Wagon]

This bearing could possibly be used as the rear pinion bearing to put the Chrysler pinion in a V housing?
Tapered roller bearings, single row - HM 804846/810. Obviously there are still possible issues with the other parameters of the pinion but that is a known difference going in that appears to have a solution.

 

[V Wagon]

Talking to a friend, he might be able to hook me up with a drawing for the Chrysler ring and pinion. That'd make it easy to compare to ours. If a Chrysler gear could be made to work that gives V guys a whole bunch of ratios if someone wanted something other than 3.23 or 3.73.

 

[walkers4x4]

I am still not giving up hope that this ring and pinion set is a one off. GM would definitely want to save a buck and use something that could be used in other cars or is used. The only other cars that I could think of that would match for the time frame would be the Camaro SS or a corvette.

 

[walkers4x4]

Now that I look at the specs on the us gear site it looks like the Chrysler is a closer match than a Camaro. The Chrysler may have a larger pinion diameter but like you said you can compensate with a different bearing. The most critical measurement will be the distance between bearings on the pinion, cannot be shimmed much. The pinion seal diameter may be an issue but again there may be another that fits.

Last time I checked the only place I could find a new diff was on eBay and the asking price was $3250! If we can’t find a match to these gears one of these companies will build one soon. There just have to be enough people asking for them.

 

[V Wagon]

My friend wasn't able to get me anything from his contacts. I'm going to contact US Gear and see what they might be willing to give me. I mean, if I tell them there's an unsupported car community that might buy an existing product they have if we can align some dimensions I imagine they'd be pretty helpful?

 

[KrzyFast]

I saw a 2009-2015 cts-v rear diff listed on ebay yesterday. maybe worth checking out.
Excellent work on sourcing parts for the V's diff!

 

[V Wagon]

I just emailed US Gear. I'll report back when I have a response. Hopefully that report will have a comparison of the dimensions of their gears to ours. Maybe if we're lucky they'll be interested in actually supporting this little project on their side? But any dimensions they give will help figure things out.

 

[adam112]

Now that I look at the specs on the us gear site it looks like the Chrysler is a closer match than a Camaro. The Chrysler may have a larger pinion diameter but like you said you can compensate with a different bearing. The most critical measurement will be the distance between bearings on the pinion, cannot be shimmed much. The pinion seal diameter may be an issue but again there may be another that fits.

Last time I checked the only place I could find a new diff was on eBay and the asking price was $3250! If we can’t find a match to these gears one of these companies will build one soon. There just have to be enough people asking for them.

Thats the challenge with our platform...there just arent. It takes members here doing the grunt work to bring anything to market at an acceptable pace, if ever. Sure, you will need bearing/seal supplier support too, but that should all be off the shelf stuff, or then we're screwed because custom equals $$$

Definitely respect the work Walker, and appreciate the effort V Wagon...we need it! Rear diff has been an area Ive considered dabbling in myself as well, just havent needed to and Ive been busy enough in other directions!

A well spec'd rebuild kit, or even core swap solution, could provide some nice mod money for someone at least!!

 

[V Wagon]

They told me they don't provide that info in response to asking for some dimensions. So, someone would have to order one to check it out or find a 10-14 SRT owner that's done a gear swap and has the stockers laying around. I might keep asking around and see if I can find someone with a gear around.

 

[Bluebeare]

Does anyone know what GM is doing about this backorder situation on rear ends? There has got be cars lining up for warranty diff. replacements!! Are they giving out loaners to everyone?

I work in the automotive industry and it's unacceptable they don't have a solution yet. Are the ring and pinion sets like genetically bonded to each diff housing or something? What makes this diff, one of the few unservicable GM diffs that my guys at D&R Driveline have ever seen....they have been doing drivelines since my grandpa's racing days.

 

[V Wagon]

Does anyone know what GM is doing about this backorder situation on rear ends? There has got be cars lining up for warranty diff. replacements!! Are they giving out loaners to everyone?

I work in the automotive industry and it's unacceptable they don't have a solution yet. Are the ring and pinion sets like genetically bonded to each diff housing or something? What makes this diff, one of the few unservicable GM diffs that my guys at D&R Driveline have ever seen....they have been doing drivelines since my grandpa's racing days.

Does D&R do any work on 10-14 SRT diffs? I still think there's potential to make a gear set from one of those work. One of the Mopar guys I asked told me where he had his done and it started with a D so when I saw D&R I got a bit excited, but I went back and looked at our Facebook convo and it was DTS.

 

[Bluebeare]

I'll call them tomorrow and see if they have an r&p set for the srt. Maybe they can provide some measurements or guidance. I have no doubt in my mind that if I gave them a noisy V diff, I could get something back drive able with less to no noise.

 

[bmylez]

Any luck on this?

 

[V Wagon]

I've hit a wall on my side as far as anything relating to the Chrysler diff. If someone can come up with some measurements I can compare them to the 3D of the V diff though to see what we can figure out. Or any other gear set someone might see the potential in for that matter. Things made by/for Getrag diffs should be the most promising though since that's who made our diffs.

 

[subaru335i]

Damn. This is kind of concerning. My rear diff doesn't seem to make any concerning noise but I only have 30k miles on it and have yet to do a fluid swap to see the state of things.

It would be good piece of mind to know if there was a solution.

 

[bmylez]

I've hit a wall on my side as far as anything relating to the Chrysler diff. If someone can come up with some measurements I can compare them to the 3D of the V diff though to see what we can figure out. Or any other gear set someone might see the potential in for that matter. Things made by/for Getrag diffs should be the most promising though since that's who made our diffs.

Yeah, was hoping Bluebeare would get back to us.

 

[Bluebeare]

I'm sorry squad I have not forgotten you. I have two of my doomsday/superhero type people looking into this.

1. I keep seeing this thread mention CAD for rear diff components in our V. Is it official CAD? Can I have it?

2. Can anyone peel any part #s off the inside or outside of the diff housing?

3. If it comes down to this, I may have to ask someone to ship me a ring and pinion in any condition to get one compared, or sent out for analysis.

4. I have an A2LA lab at my disposal so I can reverse engineer it at worst case scenario.

 

[V Wagon]

I'm pretty sure I'm not allowed to send out the CAD data for any parts. Even if you were at a supplier and had Aspera access already there'd have to be some actual GM business purpose for doing it. But I will compare anything that helps.

In the electronic parts catalog there's no PN shown for the case, just the assembly PN. The case isn't even shown as a separate part, just Carrier includes 2-31 (all the other parts) The cover is identified as an individual part but has no PN.

The assembly PNs are 20931063 for the 3.23 and 20931073 for the 3.73.

 

[bmylez]

Maybe walkers4x4 would be willing to send in his 2nd ring/pinion for science?

 

[walkers4x4]

Absolutely. I am on detachment for the next few weeks but I can definitely ship the R and P when I get home. The LSD carrier has part numbers on it so good news...that is probably a part that shows up in high performance cars. If any of you sleuths want to search for it, it is part number 64_0025_01. The underscores are missing numbers that were drilled through for the assembly. My best guess is that the first number is a 6 or 8 or 0. The second missing number is possibly a three? If we can id the carrier we might have better luck figuring out what the ring gear is. I’m still planning on buying a Chrysler set from amazon and checking the specs and then sending it back if it doesn’t make sense.

I drilled an access hole in the top of the diff so I could measure backlash. After replacing only the carrier bearings on my second diff and the noise getting worse, backlash plays a huge role in the noise of this gear set. I bought a new shim set that I think will work for the carrier but unfortunately I’ll have to weld the races out again and buy two new sets of carrier bearings. One set of races I have to grind down to become the set up sets and the others would be the final install. So if this rebuild ever becomes an option two sets of carrier bearings would need to be bought.

Not sure if I’m super stoked to pull the diff again on a test run unless I’m completely sure the mesh is perfect. Although I’ve gotten pretty quick on the diff swap and gotten it down to 4 hours on jack stands in my garage. Keep the faith brothers, there is a solution...hopefully it’s cheap!