6spd to 8spd Upgrade possible?

nickpohlaandp · Aug 5, 2016

So if I'm at a dead stop and put ERS in 4, when I stomp the gas it will shift 1-2-3-4 and not go beyond 4 (1:1)?

Hemi450, how do you shift when you go to the track?

charonblk07 · Aug 5, 2016

My understanding of it on the 65 is it has to have a gear selected to be in ERS, so even if you have it showing 6, it will shift through all 6 gears in order. If it stays in D then you skip the 2p (3rd) gear. The gear it shows in ERS is the maximum gear it will shift into unless it's 1st where it will automatically shift to 2nd no matter what you try and do or what mode you're in.

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Hemi450hp · Aug 5, 2016

I put the shifter in 3rd gear at the line. Doing this allows it to shift from 1-2, 2-2P, and then I manually shift it from 2P-3. When shifting manually, the gear selector in the dash will say "3", but you are really in 2P.

If you leave it in drive, it will go 1-2-4. It only upshifts into 2P at WOT when shifting manually.

nickpohlaandp · Aug 5, 2016

That's interesting. So I'm going to try this. Is it pretty noticeable using 2 and 2p? Have you tried it on the strip with it in "D" and skipping 2p? I'm curious to know what you noticed as far as differences on your timeslip et and mph.

I've been Googling like crazy and found out a lot more stuff about this trans. From what I can surmise is it's the same thing as the 545 but the electronics are set up a bit different. In "D" it uses 2 for upshifts when going through the gears but it catches 2p (3) instead of 2 for downshifts. The two ratios are pretty close together also. 2 is 1.67 and 2p is 1.50.

BlownGP · Aug 6, 2016

nickpohlaandp said:
That's interesting. So I'm going to try this. Is it pretty noticeable using 2 and 2p? Have you tried it on the strip with it in "D" and skipping 2p? I'm curious to know what you noticed as far as differences on your timeslip et and mph.

I've been Googling like crazy and found out a lot more stuff about this trans. From what I can surmise is it's the same thing as the 545 but the electronics are set up a bit different. In "D" it uses 2 for upshifts when going through the gears but it catches 2p (3) instead of 2 for downshifts. The two ratios are pretty close together also. 2 is 1.67 and 2p is 1.50.

They are the same trans, just the tuning is set up different.
And if you want to go back farther 5/6 speed are derived from the 45rfe.

The 2nd prime makes **** so confusing when shifting in manual mode, I don't even know why they came up with the stupid 2p. lol

nickpohlaandp · Aug 6, 2016

Well that was interesting. I did what Hemi450hp said and the 2-2p shift was not too noticeable other than a slight drop in RPM. The truck didn't even shift into 1:1 until just over 105 mph. That was fun, but I definitely need 4.10's.

As an aside, I didn't realize that it will automatically shift to second even if you have it in 1. Apparently it won't let you overrev the drivetrain in first.

charonblk07 · Aug 6, 2016

nickpohlaandp said:
As an aside, I didn't realize that it will automatically shift to second even if you have it in 1. Apparently it won't let you overrev the drivetrain in first.

charonblk07 said:
The gear it shows in ERS is the maximum gear it will shift into unless it's 1st where it will automatically shift to 2nd no matter what you try and do or what mode you're in.

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6spd to 8spd Upgrade possible?

nickpohlaandp

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charonblk07

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Hemi450hp

Moe's Performance

nickpohlaandp

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BlownGP

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nickpohlaandp

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charonblk07

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