Frankenjeep part ID

The tub is a 66 Tux and the engine is 225V6 (correct era). The tranny/xfer that came with is T90A/D-18 twin stick for the 134 engine. The rear axle is the tapered (think D-44) with drums and has external gear ratio tag 4:56. The front is an open knuckle with drums and no tags. There are numbers on the long tube 183 B5 and 603 365 2. Two days of searching and I can't find a translation of numbers 603 365 2 but have determined build date of jan 8 73? I need to know if this axle has the same ratio 4:56 without tearing it apart. It's not my jeep. Also I can't find any vin number on the frame behind the right spring hanger but did find numbers stamped into the front on both sides reading 34 2051. Any help please.

 

2x on counting revolutions but you will have to be accurate. Obviously not much difference between 4.27's or 4.88's from 4.56's. I don't think the tube numbers will actually get you much other than build date.

 

Rotate the tire through 10 complete revolutions. That should give you a fairly accurate ratio.

 

Tnx guys. Will do this.

 

I prefer to pull the cover and inspect the gears, look for L/S diffs, and get the numbers or tooth counts. A gasket and some gear oil is a small price to pay for accurate, and sometimes valuable, info., IMO. But, turning the tire should get you close to determining the axle ratio.

 

With the one wheel on the ground and the other in the air, rotate the wheel TWO full revolutions and count the number of revolutions of the propeller shaft. The number of revolutions of the propeller shaft would be the ratio to 1.

If the jeep originally had the F-134 the stock ratios would be 4.27 or 5.38. If it had a V6 originally the stock ratios would be 4.88 or 3.73. A 4.56 ratio would be an oddball; I'd suspect that that axle was swapped from something like a DJ jeep (centered differential) and if you have that ratio be sure to check both axles to make sure that they are matched.

 

Yep, a 4.56 ratio is strange for a CJ. 4.56s are popular today as replacement gears, but I believe Jeep never offered them in CJs.

Better to look at the edge of the ring gear, if possible. The ring and pinion tooth counts will be there.

 

I will try to open them up tomorrow. Tnx for all the info. Tim I think this open knuckle may have come from a commando but not sure. Tnx.

 

4.56 was not stock for CJ's or Commando's/Jeepster's.
if it does have 4.56 they were swapped in. The date code you show for the front axle should be a Dana 30 from an intermediate CJ or Commando assuming it is narrow track CJ width.


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4.56 was used in some DJ's and it's a common IH Scout ratio.
As you know the DJ's require an axle assembly having a centered carrier section
You may want to measure the axles drum to drum width.
49-1/2" to 51" wide for the various CJ narrow track rear axles built 1945-1975.

 

What years on the IH Scout Ken? Never heard of this. I know 4.27, 4.10/4.11, 3.73, and 3.54 ratio's were common in Scouts. There were other ratio's but not common. Even the 4.10/4.11 were not real common.

 

I have rain today and the frankenjeep is outside so will try again tomorrow to open both diffs and let you all know.

 

Well I suppose "common" is a relative term.
I meant that they were used on various Scouts.
I'm not really sure about exact vintages nor the abundance of that particular ratio.
I like Scout's O.K.
But to me they are only good as another source for Jeep parts. Ha Ha Ha !

 

What Scouts came with 4.56? Never heard of one coming with that as a stock factory offering but always willing to learn!



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I was going on some information from an old Dana Spicer chart that used to be published in the old 4WPW catalogs.
Here is the info from Wikapedia:
In Scout IIs, Dana 30 front axles and Dana 44 rear axles were standard until 1974, with front Dana 44 axles as a special order.
After 1974 Dana 44 front and rear axles became standard on all Scout IIs.
Available gear ratios were 2.72, 3.07, 3.31, 3.54, 3.73, 4.09, 4.27 and 4.54.
Trak-Lok limited slip differentials were optional.

I find some of the Wikapedia information to be questionable.
Example: I never heard of Trac-Lok (mis-spelled by Wikapedia) being used with Scouts.

Perhaps 4.56 was only a factory option for IH Scout.
Not real sure.
If I come across other solid evidence I'll let you know.

Hmmmnn ... Looks like one application was 1210 PU and Travelall (non removable carrier) 41-9 teeth.

 

I forgot to add the 2.72, 3.07, and 3.31 so thanks for adding those.
I know Trac-Loc was available as an option as were Pow-R-Lock's.
we had a pallet of NOS Scout 2 Dana 44 rear axle assemblies with 2.72 and Trac-Loc's. they had never even had oil in them. The gear marking compound was still on the gears from the factory setup.

I could see 4.56 being an option for the pickups and Travelall.
I've never seen a Scout 80, 800, or Scout 2 with 4.56 from the factory which is why I'm so curious about the availability. I've installed a LOT if 4.56's in Scout axles though and it should have been an option IMHO.



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OK. I opened both axle diffs this afternoon and here is what I found. The rear is a D-44 width +/- 50" 10" drums 2 piece axle with ring gear markings of 10-2-65 Dana 18525 A3029 44-9.

Front has open nuckles +/- 53" (that's wms-wms) 5 on 5.5 lockouts (MM) 6 bolt drums are finned (ribbed) with pass side drop and ring gear markings of 7-5-73 Dana 33428 A3033 47-11 271S.

So I know the rear diff is 4:89 not 4:56 as the external tag said. The front is 4:27 so the two are not compatible. Any Ideas what the front is from? The rear is obviously cj v6. Tnx

 

4.27 FDR in 53" wide D30 is the optional gear ratio for 1972 -1975 CJ-5/6.

 

Thank you very much.