[Found!] 1963 Valiant differential rebuild kit and ring and pinion gears

[Tim.g.howard]

I'm wanting to restore/preserve my '63 Valiant and the rear 7 1/4 differential is completely worn. I know it's popular on the forum to replace these and I'll consider it if I can't find the parts to restore this one but can anyone point me to where I can find ring and pinion gears (maybe 3.23 or 3.55 or even replace the 2.93)? Also can anyone recommend a good rebuild kit for the rest of the diff?

Thanks

 

[junkyardhero]

i can't be of much help, but what i can tell you is that there's is a bunch of stuff that's NLA and there are at least two different 7.25 variants in small bolt pattern-- ie up until '72 (and then numerous others in big bolt).

number one on the hit list is that the spider gears are long out of print, so you're either hunting down nos/dead stock or used. no matter what the description says online, do not be fooled, the later dakota does not cross over.

i know that there's two different yokes, one for the each sub set of gear ratios. however i can't tell your what the break down is on that. so just keep that in mind when ordering ring and pinion.

some stuff from the 10 bolt can interchange with the 9 bolt. the 10 is c-clip axle and started around 1981, the 9 bolt is not a c-clip axle.

the last one i did was ages ago and i used motive gear. thankfully it was a SG unit so it was a straight R&R job. anyway, might be worth an email over to them and see if they still stock those gears.

 

[cudamark]

I think I have an NOS ring and pinion. I'll have to check to see which ratio it is though.

 

[Tim.g.howard]

That would be awesome. Thank You! Honestly, anything less aggressive than 4.1 would be welcome. That would really compromise the car's top speed too much I fear. Any insight into what is different with the carrier gear kit between a 1963 and what is available on the net today would also be awesome... is it the number of splines on the axle's or what?

Thanks!

 

[cudamark]

I have just about everything in NOS for that rear end....at least according to my inventory ledger. I'd have to put my hands on the actual part to verify. I show a 2.93 ring and pinion, the carrier bearings, the pinion bearings, side gears and spiders (for non-sure grip) axle bearings and seals, and pinions shaft seal. In looking up some of the numbers, I find some of them are different from the '63 parts book to the '66 parts book. Maybe the part interchanges but the number was superseded for some reason? Bearings and seals are all the same, but, the side gears are 2070023 in the '63 book, and 2404194 in the '66 book. Same with the spiders.....2070025 and 2404195 respectively. The ring and pinions show 2070596 in '63 and 2743204 in '66. I'd have to dig it out to see exactly what's on the box or gears as far as numbers. The parts I have are genuine Mopar NOS parts, or, NOS U.S. made Timken when it comes to the bearings.

 

[townsend]

May be able to help with part numbers.
2070023 and 2070025 were used from 1960 thru 1965. They never superseded to a newer number.
2070596 has a long supersede history.

2070596 - 1962 - 1963
2467132 - 1964 - 1965
2743204 - 1966
2643204 - 1967 - 1970
Each number supersedes to the following number.

 

[Slantsix64]

You can use a ring and pinion out of a dodge Dakota 7.25 that’s what I did

 

[cudamark]

You can use a ring and pinion out of a dodge Dakota 7.25 that’s what I did

That may be true, but, I can't say for sure. The 2.93 set I have has an early ring gear number (2070480) and a much later pinion number (3507746)! Here's the NOS Mopar parts I have.....all the bearings for the pinion gear, carrier, and axle shafts, the seals for the axle shafts and pinion flange, and the 2.93 ring and pinion. I also have a used sure grip unit for a 7 1/4, and NOS side gears (2), spider gears (4), and shafts (2) for it. No good on any non-sure grip side gears and spiders for that early carrier. I have one new side gear for the '66-up carrier along with 2 nice used spiders for the later one. Not sure what the difference is, but, they're a different number. I don't have any shims, pins, gaskets, nuts, bolts, or other hardware other than what I mentioned here. Most of those can be reused or available at the auto parts store. Let me know if you're interested in the sure grip stuff and I'll post a photo of those too.

 

[Slantsix64]

It is true I done it twice, be careful when mix matching ring gears and pinions, I had a issue using a early 3.23 gear set with a later carrier.

 

[65 Cuda 340]

May be able to help with part numbers.
2970023 and 2070025 were used from 1960 thru 1965. They never superseded to a newer number.
2070596 has a long supersede history.

2070596 - 1960 - 1963
2467132 - 1964 - 1965
2743204 - 1966
2643204 - 1967 - 1970
Each number supersedes to the following number.

Are these numbers for ring and pinion set?

I have NOS 3.55 ring and pinion, but the set is for 60 and 61 (I think) and it uses smaller bolts in the ring gear than the later gear sets. At least I think that's right. I would love to use them in my 63 Valiant if they would fit. (It has 2.93 gears now.)

 

[townsend]

That was a mistake that has now been corrected.
The 7 1/4 with a 2.93 ratio was not offered until 1962.
There was a early and late 3.55 Ratio in 1961.
Early version had 5/16 holes in the ring gear and late had 3/8 holes.

 

[cudamark]

My ring gear has 3/8" bolts.

 

[65 Cuda 340]

My 3.55 ring gear has 5/16" bolts. So it's pretty much useless.

 

[cudamark]

My 3.55 ring gear has 5/16" bolts. So it's pretty much useless.

i don't know about that. With the 100+ 7 1/4's I've had apart, I've never seen the ring bolts sheared. It's almost always the spiders and side gears that fail. On the sure grip models, it's more common that the pinion and/or pinion bearings that fail first.

 

[65 Cuda 340]

Well, I meant that it won't fit my rear end. Will it?

 

[cudamark]

Here's the sure grip carrier and the NOS parts I have for it.

 

[eekvonzipper]

Here's the sure grip carrier and the NOS parts I have for it. View attachment 1716260687View attachment 1716260689View attachment 1716260690View attachment 1716260691

Does the Sure-Grip Unit Replace an Open-Carrier in the same Axle Housing/ use the same Axles?
What Gears are on that?
I have an Open 2.93 in my '65 barracuda that I would Love to replace...
P.M. me with a Price for that?
and I Sincerely apologize to the Original Poster if This is considered Hi-Jacking.

 

[Seth Jones]

I'm wanting to restore/preserve my '63 Valiant and the rear 7 1/4 differential is completely worn. I know it's popular on the forum to replace these and I'll consider it if I can't find the parts to restore this one but can anyone point me to where I can find ring and pinion gears (maybe 3.23 or 3.55 or even replace the 2.93)? Also can anyone recommend a good rebuild kit for the rest of the diff?

Thanks

I have an NOS 2.76 ring and pinion dated 1970 i would sell.

 

[AJ/FormS]

Are these numbers for ring and pinion set?

I have NOS 3.55 ring and pinion, but the set is for 60 and 61 (I think) and it uses smaller bolts in the ring gear than the later gear sets. At least I think that's right. I would love to use them in my 63 Valiant if they would fit. (It has 2.93 gears now.)

I think if I was in your predicament, I would have solved my way past that a long time ago. Jus saying.

 

[65 Cuda 340]

I think if I was in your predicament, I would have solved my way past that a long time ago. Jus saying.

Or I could just swap in the spare A body 8 3/4 I have.

 

[Tim.g.howard]

Or I could just swap in the spare A body 8 3/4 I have.

If you do that, it'll tempt you to put a few more horses under the hood... and the dominos start falling... ;-)