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Rear main seal AJ126, different sizes?

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Old Apr 2, 2026 | 01:33 AM
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Default Rear main seal AJ126, different sizes?

Hi,



I recently rebuilt the AJ126 (3.0L V6) engine in my 2014 Jaguar F-Type. The engine runs great, however I am experiencing a small oil leak on the transmission side.



I removed the transmission and installed a new seal, but I suspect I may have made a mistake. During inspection, I didn’t notice anything unusual, but it appeared that the outer seal lip (dust lip) was not contacting the shaft. I installed the new seal with great care and precision, yet there still seems to be a slight gap between the seal and the shaft.

I have attached a photo for reference.



Are there different types of seals used for the AJ126? My car was built in 2013.



Kind regards,

Adam
AJ126 rear main seal barely or not touching
Gap
Gap

 
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