Quote:

Call Jamie Passon- Passon Performance - you know the 4 and 5 speed guy. He has his own proprietary transmission lubricant for mopar 4 speeds. There is a significant difference between his lubricant and the off the shelf products that many will recommend. btw I torture tested the Passon product and the OFTPs and his by far performed the best.



For Jamie Passon's new 5 speed tranny, he recommends Lucas Synthetic 75W90. I believe all his testing was done using this lube.
https://www.lucasoil.com/images/medialibrary/TDS10047_Syn-75W-90-GearOil.pdf


1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL