Propulsive Dynamics, LLC is happy to announce that we will soon be offering a complete drop-in solution for the 6HP21/19 transmissions that are currently found in N54/N55 powered vehicles. It is preferred that the customer send in their stock unit for rebuild, however, sending a salvaged donor unit is also possible. We also strongly advise that the end user utilize an ATF cooler to aide in heat management of the system.
The fully built transmissions offered by Propulsive Dynamics feature the following…
- Upgraded G3 Friction Material frictions (technical info brochure attached)
- Upgraded Kolene steels (technical info brochure attached)
- Increased clutch plate counts
- Upgraded Race Bushings throughout
- ZF Complete Overhaul Kit
- Fully rebuilt and upgraded valve-body
- Fully rebuilt and upgraded torque converter (stock stall, currently)
- Each finished unit is fully calibrated on a loaded transmission dyno cell
- Each unit is shipped with a calibration data packet which also includes the adaptation procedure
Propulsive Dynamics, LLC has formed an exclusive partnership with European Transmissions. They will be performing the rebuilds and dyno calibration of all of our units. They are a BMW certified transmission refurbishment facility for BMW USA.
The calibration procedure includes increasing line pressures in each clutch drum, increased flow through the ATF pump, adjustments to slip durations to compensate for the increased friction coefficient and adjustments to the adaptation parameters themselves in order for the system to learn within its new boundaries. We are rating the performance increase at ~30% over the known capacity limit of the stock configuration with increased spectrum of usage and margin of safety.
We currently have 4 beta units in the field and the owners are all reporting extremely positive results. More quantifiable data will begin to flow in after this weekend and I am encouraging them to post any and all feedback. Some of the feedback reported thus far has been…
- Faster, sportier shifts
- Firmer, more deliberate shifts
- OEM-lke shifts during daily driving
- Increased shift points (7100 RPMs reported) at WOT
We plan to launch a 15 spot group-buy at the conclusion of beta testing which, hopefully, won’t be too much longer. Early interest in the group-buy can be expressed in this thread. Group-buy pricing will be $4,500.
Any updates will also be posted in this thread.
EDIT for Group-Buy info:
↑
"Jason, out of curiosity, do you have any idea on how the group buy will roll out? Deposits? Delivery windows? Deposit refund policy? Etc."
Excellent question. Currently, our thinking is that after we get 15 people signed up, we would ask for 50% down to start manufacturing the clutches and bushings. Upon completion of the manufacturing phase, currently estimated to be in the 2 week domain, we would then ask for the remaining 50% and for the customer to send us their transmission for upgrade.
After we receive the customer's transmission, turnaround time is estimated to be 4 days based on what we experienced with building the 5 previous units. The rebuild process looks like this...
- Disassembly
- Deep cleaning
- Complete inspection
- Reassemble with upgrades
- Dyno calibration
- Ship
Group-Buy List:
1) nitemare
2) 08_335i
3) doublespaces
4) braddman
5) wtfmarine
6) obed figureroa
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
Here's a pic of the loaded trans dyno cell we use...
Here's a pic of a customer's transmission right before install...
The fully built transmissions offered by Propulsive Dynamics feature the following…
- Upgraded G3 Friction Material frictions (technical info brochure attached)
- Upgraded Kolene steels (technical info brochure attached)
- Increased clutch plate counts
- Upgraded Race Bushings throughout
- ZF Complete Overhaul Kit
- Fully rebuilt and upgraded valve-body
- Fully rebuilt and upgraded torque converter (stock stall, currently)
- Each finished unit is fully calibrated on a loaded transmission dyno cell
- Each unit is shipped with a calibration data packet which also includes the adaptation procedure
Propulsive Dynamics, LLC has formed an exclusive partnership with European Transmissions. They will be performing the rebuilds and dyno calibration of all of our units. They are a BMW certified transmission refurbishment facility for BMW USA.
The calibration procedure includes increasing line pressures in each clutch drum, increased flow through the ATF pump, adjustments to slip durations to compensate for the increased friction coefficient and adjustments to the adaptation parameters themselves in order for the system to learn within its new boundaries. We are rating the performance increase at ~30% over the known capacity limit of the stock configuration with increased spectrum of usage and margin of safety.
We currently have 4 beta units in the field and the owners are all reporting extremely positive results. More quantifiable data will begin to flow in after this weekend and I am encouraging them to post any and all feedback. Some of the feedback reported thus far has been…
- Faster, sportier shifts
- Firmer, more deliberate shifts
- OEM-lke shifts during daily driving
- Increased shift points (7100 RPMs reported) at WOT
We plan to launch a 15 spot group-buy at the conclusion of beta testing which, hopefully, won’t be too much longer. Early interest in the group-buy can be expressed in this thread. Group-buy pricing will be $4,500.
Any updates will also be posted in this thread.
EDIT for Group-Buy info:
↑
"Jason, out of curiosity, do you have any idea on how the group buy will roll out? Deposits? Delivery windows? Deposit refund policy? Etc."
Excellent question. Currently, our thinking is that after we get 15 people signed up, we would ask for 50% down to start manufacturing the clutches and bushings. Upon completion of the manufacturing phase, currently estimated to be in the 2 week domain, we would then ask for the remaining 50% and for the customer to send us their transmission for upgrade.
After we receive the customer's transmission, turnaround time is estimated to be 4 days based on what we experienced with building the 5 previous units. The rebuild process looks like this...
- Disassembly
- Deep cleaning
- Complete inspection
- Reassemble with upgrades
- Dyno calibration
- Ship
Group-Buy List:
1) nitemare
2) 08_335i
3) doublespaces
4) braddman
5) wtfmarine
6) obed figureroa
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
Here's a pic of the loaded trans dyno cell we use...
Here's a pic of a customer's transmission right before install...
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