What's the gear ratio??

I know... I'm being lazy. I just don't want to take off the rear diff cover. I crawled under my stock '67 CJ5 to look for the tag on the rear diff cover and the only tag there is one that says to "only use limited slip differental fluid". Were these tags used with rear ends with power loks? What gear ratios were available for the '67 with a power lok if that's the case? I know without pulling the cover, one never knows for sure, but I'm just curious.

Question 2. I just purchased a Dana 44 rear end with flanged axles. (thanks baljoint). I also purchased a track lok carier for the flanged rear end and am wondering if the ring and pinion would work off my current rear end in the flanged rear end?

Thanks!!

 

Yes, it should be a PowerLock. Same ratios for PowerLock as for open, 3.73std/4.88opt for V6 and 5.38std/4.27opt for F134.

 

Yes.
The original tags are steel and the lettering is pressed onto the backside of the tag.
Gear ratios are not dependant on Powr Lok.

The final drive ratio is relative to the 1967 standards used for all CJ's.
F-134 was the standard engine.
D-225 was an optional engine.
If equipped with F-134 the standard final drive ratio was 4.27.
If equipped with F-134 the optional final drive ratio was 5.38.
If equipped with D-225 the standard final drive ratio was 3.73.
If equipped with D-225 the optional final drive ratio was 489. (rear) with 4.88 (front)

Ring and pinion are fully interchangable between tapered type D44 and flanged type D44.

 

Tim,
The 5.38 final drive ratio was standard and was the only ratio available for all CJ's before the 1963 model year.
The 11/62 final drive ratio change is associated with the implementation of the T90 C.
CJ standards are fully dependant upon vintage.

http://www.film.queensu.ca/CJ3B/Photos/Tech/ServiceBulletins/SB601AxleRatio.JPG

 

You see more with 5.38s, so I concluded the 5.38s were standard.

Maybe by 1963 Jeep was trying to get a little more top end from the F134?

 

Yes exactly so.
1960's was the beginnings of the muscle car era and Jeep was lagging way behind.
The previous upgrade from Go Devil to Hurricane allowed for this small increase of top speed.
Turned out to be a temporary solution just prior to the availabity of the Warn O.D.
The Warn O.D. was designated as Jeep Special Equipement in September of 1964.
From my understanding the Fireball 198 was the initial incentive for Jeep to put a larger engine into the CJ's.
I have an old 1964 magazine article that details the Fireball 198 installation into a CJ-5.
This all came together for the Jeep CJ's in late 1965.
It is my opinion that the CJ-3B was dropped by late 1965 in an all out effort to get the Dauntless CJ's up and running.

 

Thanks for all the good info! It is a pure stocker with the Dauntless V6. Will probably take my time rebuilding the flanged axle and install when complete.

 

Yes the flanged axle is a decent upgrade for a Dauntless powered Jeep.
IMHO the flanged D44 is overkill for a Hurricane powered Jeep.

 

To the OP - Note that the 3.73 gears take a different case ("carrier") from the higher numeric gear sets, so for example 4.88 gears won't fit on a 3.73 PowerLock or TracLock, and vice-versa. And the side gears in your PowerLock are the wrong spline for a flanged axle.

 

If you already have a Powr Lok along with a desireable final drive ratio then you should seriously consider keeping your jeep set-up just as it is.
The Trac Loc differential is inferior to the Powr Lok mainly beacause the Trac Loc has fewer and weaker pinion mate gears.
If you're not amply outfitted with special tools it can be a real pain when attempting to install ring and pinion gear sets.
The main advantage to the flanged 44 is the increase of axle shaft diameter.
The flanged 44 axle housing tubes are also larger and stronger for those seeking a little "air time".
The flanged D44 is the best axle assembly ever installed at the factory under a CJ.
Sadly Jeep never equipped the fllanged 44 with optional Powr Lok differentials.
Jeep 30 splines D44's used the Trac Loc option only.
Original 30 spline D44 Powr Lok differentials are relatively scarce.
They were installed into some IH vehicles and also installed into a few Chevy/GM light trucks.

 

I have a 1968 cj5 with 225 and the axle ratios are 4.27. Still have the factory tag on differential. Was that an option in 1968?

 

CJ FINAL DRIVE RATIOS 1945 -1975

Beginning 1945 on through 11/1962 the only final drive ratio for all CJ's is 5.38
Beginning 11/1962 on through 1971 the standard final drive ratio for all CJ's is 4.27
Beginning 11/1962 on through 1971 the optional final drive ratio for all CJ's is 5.38.
Beginning 1965 on through 1971 the standard final drive ratio is 3.73 for all CJ's with factory installed D-225
Beginning 1965 on through 1971 the optional final drive ratio is 4.88 for all CJ's with factory installed D-225
Beginning 1972 on through 1975 the standard final drive ratio is 3.73 for all CJ's regardless of engine installed.
Beginning 1972 on through 1975 the optional final drive ratio is 4.27 for all CJ's regardless of engine installed.

 

whats the best way to now if you have the standard or optional gear ratio with removing the diff cover?

 

Persoally, I always remove the covers on the front and rear axles. that way I know what's in there and I can inspect the gears.
The gear count is stamped on the ring gear. 2nd issue is if you have some sort of traction device (one of the reasons to pull the covers).
Put something like a chalk mark on a tire you have jacked up (Only one), rotate the driveshaft until the tire rotates twice. Count the revolutions of the driveshaft. You should know the ratio.

 

I forgot, sometimes there is a metal tag under one of the cover bolts that gives you the gear ratio. I haven't seen one of those for years. They seem to get lost somewhere over the years.

 

My 1962 CJ-5 has a Dana 44 with 4.27 gears in it with the F-134 in it, so your date may be incorrect...

 

OK, this explains why my '62 has a 4:27 in it. It was a late model '62, I guess...

 

My 62 has 5.38 gears. My pic is under what gear ratio is best thread. But it has 43 8 stamped on gear. 43/8 =5.38