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Hemi fourspeed overdrive

Posted: Sun Jan 01, 2017 7:57 pm
by morty318
Hi guys, does anyone have any experience with the Passon hemi four speed overdrive?, or any overdrive systems for our cars?

Re: Hemi fourspeed overdrive

Posted: Mon Jan 02, 2017 11:55 am
by 71bird
I have one in my car, and I love it. My rear is 3:54, so on the highway I can run as fast a I want without running the motor to death. Around town I usually leave it in 3rd just for cursing.

Re: Hemi fourspeed overdrive

Posted: Wed Jan 04, 2017 1:05 pm
by 71bird
Did that help any?

Re: Hemi fourspeed overdrive

Posted: Wed Jan 04, 2017 10:49 pm
by morty318
So it still has 4 gears?, the 4th being an overdrive?

Re: Hemi fourspeed overdrive

Posted: Wed Jan 04, 2017 11:06 pm
by 71bird
Private message sent.

Re: Hemi fourspeed overdrive

Posted: Thu Jan 05, 2017 9:10 pm
by 71bird
Give me a call at 423-312-6962 and I tell you about the O/D transmission.

Re: Hemi fourspeed overdrive

Posted: Sat Jan 07, 2017 4:36 pm
by moparite
How about posting it here for others to see! Seems Passon picked up where Keisler left off.

https://www.passonperformance.com/image ... 091109.pdf

https://www.passonperformance.com/

Re: Hemi fourspeed overdrive

Posted: Sat Jan 07, 2017 6:16 pm
by 71bird
No, the Passon is completely different than any other OD trans on the market. It's not only different, it's soooo much better.

Re: Hemi fourspeed overdrive

Posted: Thu Jan 26, 2017 7:11 pm
by road chicken
I wish Passion was an option back when I bought the Shaft Me Keisler Perfect Fit tremec. I'm still working on getting the drive angles right. Although I now know there is no alternative other than to cut the crossmember and build a custom trans mount. BTW Silver Sport transmissions is the old Keisler and they have NOT corrected the issue with the angles- or will tell you that some of these cars, ( for some mysterious reason) will not have the right angles. You have to chop your car up to find out. Sure had the right angles with the 4 speed. :roll:

Re: Hemi fourspeed overdrive

Posted: Thu Jan 26, 2017 7:18 pm
by 71bird
Even with a stock 4 speed, the angles could be off, that why there were special tools, and the service manual shows how to check, and correct it. And they sold shims for the job. I wonder if the OP ever decided what to do?

Re: Hemi fourspeed overdrive

Posted: Thu Jan 26, 2017 10:14 pm
by road chicken
Oh sure. very few cars I've worked on didn't have the shims at the trans mount for setting the angles . Now it's much easier with digital levels it takes about 5 minutes to get the readings and figure out where the adjustments need to be made. not difficult at all, as long as there is room.