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Unread 08-06-2013, 08:54 PM   #1
2007st1300abs
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1978 CJ7 
 
Join Date: Sep 2011
Location: , BC
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New Cj owner in need of identification help

Hi Guys I recently purchased a 1978 CJ-7 and I am trying to identify the motor, transmission and transfer case. The only tag that I could find on the motor is 21127 JS was also stamped near the numbers. The transmission has Borg Warner 1301065906 and it is a 4 speed. The transfer case has Dana stamped into it , 15248 and 9017 , 39900, 45359, 22 . Some of these are on a tag and some stamped right into it.

Thanks


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Unread 08-06-2013, 10:08 PM   #2
paveland
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Just WAG but if it was a stock cj of that year in that states it would probably be a 258 L6 (4.2L) engine. T-18 trans and a Dana 20 transfer. No sure about the numbers or how they built those things for you in BC.

Hope that helps, did you try googling the numbers?
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Unread 08-07-2013, 07:16 AM   #3
2007st1300abs
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I do have the vin number J8F93EA023332
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Unread 08-07-2013, 07:22 AM   #4
2007st1300abs
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So from what the vin says it has a 258 in it , but Im not sure if that is what is in it? Would Intake manifold numbers help?


Thanks
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Unread 08-07-2013, 07:39 AM   #5
7CJ5White6
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yup thats an I6 258,
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Unread 08-07-2013, 07:52 AM   #6
WindKnot
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You very most likely have the 258 as already stated. Between the #2 & #3 sparkplug wires you will find a machined pad with stampings on it. THAT will tell us what we need to know about your engine.

If you want to know even more about your Jeep, if you can, take a look at the rear axle at the differential on the right side. Right where the tube meets the pumpkin on the rearward side of the axle the is a letter or letters stamped onto the housing. That letter or letters will tell us what gear ratio was originally installed into the axle. There's really no way to know exactly what you have now without counting gear teeth, but chances are good that the stamping will be correct. If we know what's stamped, we can take a look at whether or not spinning the drive shaft and wheels will come out at a similar ratio. (this sounds much more difficult than it is.)
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Unread 08-07-2013, 07:59 AM   #7
WindKnot
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Quote:
Originally Posted by 7CJ5White6 View Post
Yup that's an I6 258.
Well technically that COULD be a 232 but it's doubtful with the VIN. I can't imagine swapping out a 258 for a smaller I6, but let's verify before we have the OP spending money on a possible wrong engine.
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Unread 08-07-2013, 05:53 PM   #8
2007st1300abs
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Thanks for your help, the plate on the motor between 2 and 3 cylinders says 21127.
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Unread 08-07-2013, 05:54 PM   #9
2007st1300abs
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Do you have any ideas on what 4 speed trans it has ? And transfer case?
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Unread 08-07-2013, 05:56 PM   #10
iluvcowjuice
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Pics of the shifters and shift patterns?
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Unread 08-07-2013, 07:00 PM   #11
WindKnot
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There's a letter missing in that code.
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