46-48 Rear differential

[Alexander]

Hi Folks,

My rear end (diff) has never been quiet. It Hums during acceleration and declaration. Its most likely due out of spec back lash adjustment. I don’t want to spend the time adjusting it as I feel Ill never get it right.

Anyone have a known good rear they would like to let go?

Thanks!

Alex

I am located in the North East (NJ)

[Don Coatney]

If you dont want to spent the time adjusting it simply add some sawdust to the oil mix. That used to be a common practice with shady used car dealers.

I also have a slight whine in my rear end. But I have checked for hot spots and found none so I will live with it for now. Have you checked for hot spots?

[dezeldoc]

I have a 3.91 i will let go of for 50.00

[daddyo23]

Got a 3.73

[Alexander]

wow itresting, saw dust! Kind of makes sense.

I am very dempted to try it.

what years would be a direct bolt on replacment for my 47 ply (as a fully assembled axel).

what is the stock ratio for the 47? would I feel it if I went a little lower (3.55)?

Thanks!

Alex

[Adam H P15 D30]

Heard of bananna peels too.

[Young Ed]

Those tricks were used my shifty used car salesmen just to make a sale. I highly doubt they were much of a long term fix.

[Adam H P15 D30]

I found a diaper in the lower cover of a chevy bellhousing once to hide a rear main leak.

[Alexander]

Thanks for the feedback. Although I am tempted, I prefer a permanent fix.

what years would be a direct bolt on replacement for my 47 ply (as a fully assembled axel)?

what is the stock ratio for the 47?

[55 Fargo]

wow itresting, saw dust! Kind of makes sense.

I am very dempted to try it.

what years would be a direct bolt on replacment for my 47 ply (as a fully assembled axel).

what is the stock ratio for the 47? would I feel it if I went a little lower (3.55)?

Thanks!

Alex

A friend of mine and I are in the process of wrecking 2 -46-48 Chryslers, that he owns.

Both Windsors, should have 3.54 s in them. But being a Canadian built 46-48 Mopar Car, it has the common modern U-joint yoke.

Not a big deal, you could use the driveshaft too, it might need to be cut down, but you would have modern ujoints both ends,

The only big deal is shipping all the way to NJ from Manitoba Canada

[Young Ed]

Stock ratio for 47 should be 4.1:1 some may have come with 3.9:1. I swapped a 3.73 center section into my stock housing and it works well. Lots of other options if you want to swap to a more modern axle. If you are wanting a mopar replacement I think only 46-48 fit possibly some of the prewar ones fit too so you'd be better off swapping the center section in that case.

[Don Coatney]

I found a diaper in the lower cover of a chevy bellhousing once to hide a rear main leak.

Bet a kotex would work too:rolleyes:

[Plymouthy Adams]

as Ed said..4.1 or 3.9..the gear in the car was selected for the area of operation..if the car was to be shipped to a hilly area..it got the 4.1 else, the 3.9 was more commmon..as most of my cars were southern go-moes..they have all had 3.9 rear units..

[greg g]

You could try taking the drive shaft off and see it the pinion nut will tighten up a hair. I had a Triumph GT6 way back when. A friend suggested that procedure, and it this case it really quieted down the rear. It didn't take much, when we put the old pointer style torque wrench on it I beleive we took it from 100 lb ft to 115.

might be worth a try before you dig into things.

[Plymouthy Adams]

best thing is these are removable hogheads and working the unit on the bench is quite feasible..the book will give you a great help doing this..pattern test, load , coast etc..preload all possible to test as an assembly...what you got to lose but a bit of time..if you don't have a huge vice to clamp it in you can build a jig

[BigDaddyO]

...

Edited January 26, 2012 by BigDaddyO

[JerseyHarold]

Alex,

There is a driveshaft place in Farmingdale that may be able to adjust the axle you have. I don't know their name but they should be fairly easy to find.

Harold

[aero3113]

Alex,

There is a driveshaft place in Farmingdale that may be able to adjust the axle you have. I don't know their name but they should be fairly easy to find.

Harold

This them??

Mr Driveshaft

31 W Main St

Farmingdale, NJ 07727

732-938-4118

[Dodgeb4ya]

It probably needs more than an adjustment, bearings and possibly a R&P set.

[BobT-47P15]

Somewhere, perhaps at the first of this forum in the reference section, is a

list of later model Mopar rear ends that are good fits.....may have to change

the spring perches a bit. I believe Mr Coatney has one such later model

setup in his car.

[Alexander]

Thanks Harold and Aero!

Good place to keep in mind. However I suspect I need more then ajustingat this point. I have been driving like this for years. I think the teath are now worn and tapered too much.

Harold, do you go to any of the local shows with your car? I usualy try to make the "Friendlys cruise-in" saturday evenings (RT 9 and Ferry rd.).

great show, Free, Trophies & prizes, about 300 cars on average, starts & 6pm, 3 shows left. Swing by, it would be great to meet you. Look for the only P15 at the show (Dark Blue)

[JerseyHarold]

Alex,

My cars are not roadworthy at this point. I stopped at the Friendly's cruise once in mid-July but didn't see a P15. If I can make it in the next few weeks I will.

Harold

[BigDaddyO]

...

Edited January 26, 2012 by BigDaddyO

[JerseyHarold]

Friendly's just went belly up.

Declared bankruptcy and folded up shop.

No more $9.99 dinners for me.......