Jaguar 4L80e question
#2
i cant help much , but i do know the GM 4L80E is a great transmission. for the money cant be beat.
the 4L60E is good , but the 80 is bomb proof! i have a big GM suburban diesel with the 80 and its has never been any problems 200K miles!
some times if you have both in front of you side by side a close examination would help a lot!
ron
the 4L60E is good , but the 80 is bomb proof! i have a big GM suburban diesel with the 80 and its has never been any problems 200K miles!
some times if you have both in front of you side by side a close examination would help a lot!
ron
#3
The NNA4400EA E (exchange) is fitted to the 4.0 Supercharged XJ sedan (six cylinder) and the NNA4400BA E (exchange) is fitted to BOTH the 6.0 XJ-S and the XJ12 sedan (V12).
I would guess the bell housing mount pattern would be different. I have never attempted to interchange the 6 and 12 cylinder gearboxes.
good luck.
bob
I would guess the bell housing mount pattern would be different. I have never attempted to interchange the 6 and 12 cylinder gearboxes.
good luck.
bob
#4
#5
The transmission themselves are most likely identical but the torque converter on the I6 will likely have a higher stall speed. The trans and converter are a package and thus would have a different part number. The I6 with its higher idle and taller 3.27 gears would most likely use a higher stall converter as is typical for 6 cylinders to increase responsiveness and reduce idle creep. The V12 with it's lower idle speed and prodigious low end grunt would likely have a low stall for refinement and fuel economy. Thats my theory. Putting the I6 converter in the V12, if it bolts up, would create a more slushy auto box experience but might also increase acceleration at the expense of fuel economy.
Last edited by icsamerica; 02-20-2019 at 11:08 PM.
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kansanbrit (02-21-2019)
#6
#7
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#8
#11
I have three of this transmissions. One is from xj40(81) then X300 and XJR6. XJR6's has blue painted torque converter and different rear end of the body. X300's has reinforced TC with steel plate. I did not find another differences niether internal nor outside .
Last edited by xjsv12; 02-21-2019 at 06:17 AM.
#12
#13
The transmission themselves are most likely identical but the torque converter on the I6 will likely have a higher stall speed. The trans and converter are a package and thus would have a different part number. The I6 with its higher idle and taller 3.27 gears would most likely use a higher stall converter as is typical for 6 cylinders to increase responsiveness and reduce idle creep. The V12 with it's lower idle speed and prodigious low end grunt would likely have a low stall for refinement and fuel economy. Thats my theory. Putting the I6 converter in the V12, if it bolts up, would create a more slushy auto box experience but might also increase acceleration at the expense of fuel economy.
#14
If the center bore of the converter is indexed into the flex plate you have some margin for imprecision, if not then the bolt holes will need to be exact.
See this. https://www.monstertransmission.com/...les_ep_74.html
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kansanbrit (02-21-2019)
#15
Ok so the converter is blue, that is color coding and the way the factory makes sure they dont get mixed up during part selection. What do you mean "diffrent rear end of the body"
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xjsv12 (02-26-2019)
#18