Good Combination for 4cyl cj7? - JeepForum.com
 
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post #1 of 12 Old 06-23-2013, 12:30 PM Thread Starter
93Trip
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Good Combination for 4cyl cj7?

Hey yall,

Just got my jeep back from having a new clutch assembly put in, and I found out that my jeep has what the mechanic called a Dana 20? Transfercase. It also has the Dana 44 axles, with a 4cyl engine, and 4 speed tranny. Is all this a good combo?

Thanks,

Trip

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post #2 of 12 Old 06-23-2013, 01:42 PM
row684
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Quote:
Originally Posted by 93Trip
Hey yall,

Just got my jeep back from having a new clutch assembly put in, and I found out that my jeep has what the mechanic called a Dana 20? Transfercase. It also has the Dana 44 axles, with a 4cyl engine, and 4 speed tranny. Is all this a good combo?

Thanks,

Trip
what year is it?
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post #3 of 12 Old 06-23-2013, 01:44 PM Thread Starter
93Trip
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1986
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post #4 of 12 Old 06-23-2013, 02:12 PM
jp360cj
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Post some pics of the Trans, tcase, and axles. Factory would have been a Dana 300 tcase, Dana 30 front axle, most likely a T4 transmission, and either a Dana 44 or AMC20 rear axle.

Not saying your mechanic is wrong, because anything could have been swapped in. need pics to verify, but I would be surprised if someone swapped the drivetrain and left 4cyl.

The D20 and D300 are both good cases but the D300 has lower low range gears from the factory and better aftermarket support.

Some D44 fronts are much stronger than the D30, some are only marginally stronger. Also if the swap was done poorly it could cause more problems than it fixed.

The T4 is not a desirable transmission, but if you have a D20 then you don't have a T4.

You'll get opinions all over the place about the D44 vs AMC20. I have ran both and have torn up the carriers in both, so IMO an amc20 with 1 piece shafts is about as good as aD44

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #5 of 12 Old 06-23-2013, 02:17 PM
nixer600
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Im not saying your mechanic is wrong, it's possible he is right, but most likely wrong.


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post #6 of 12 Old 06-23-2013, 08:32 PM Thread Starter
93Trip
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Here are some photo's I took today, but I'm not sure how much help they will be.
Attached Thumbnails
photo (6).JPG   photo (7).JPG   photo (8).JPG   photo (9).JPG  
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post #7 of 12 Old 06-23-2013, 08:44 PM
spottedfrog
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I'm gonna say: D44 rear, D30 front, D300 T-case, and I cant ID the trans. likely a T4. There is an ID tag visible on the front D30 as long as it hasn't been changed it will tell you the Axle gearing.
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post #8 of 12 Old 06-23-2013, 09:15 PM
jp360cj
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Quote:
Originally Posted by spottedfrog View Post
I'm gonna say: D44 rear, D30 front, D300 T-case, and I cant ID the trans. likely a T4. There is an ID tag visible on the front D30 as long as it hasn't been changed it will tell you the Axle gearing.
x2

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #9 of 12 Old 06-25-2013, 05:28 AM
jetmech1
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I'm pretty sure the 4 cyl. CJ's came with 4.10 gears from the factory. My 86 CJ7 did.
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post #10 of 12 Old 06-25-2013, 06:20 AM
jp360cj
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IIRC, the 4cyl were std with 3.54 with 4.10 optional. BUT I could be mistaken

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #11 of 12 Old 06-25-2013, 08:26 AM
Boomer
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Quote:
Originally Posted by jp360cj View Post
IIRC, the 4cyl were std with 3.54 with 4.10 optional.
This is correct.
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post #12 of 12 Old 06-27-2013, 05:00 AM Thread Starter
93Trip
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Mine has the 4:10 gears. I've driven it about 45 miles this week, and I've had to put in $30 worth of gas

Its starting to sputter every now and then when driving in 4th gear going down the road, thinkin it might be a float in the carb?
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