Great news on the 105, thanks for sharing that. I'll have to do a bit of research on the 105 and see how close to drop in this would be for that platform.
Our adapter only will work with the 8L90 and 10L90. Everyone wants more gears right?
Gen V 5.3 L83 / 8L90e / Blackbox / 80series
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Great news on the 105, thanks for sharing that. I'll have to do a bit of research on the 105 and see how close to drop in this would be for that platform.
Our adapter only will work with the 8L90 and 10L90. Everyone wants more gears right?
Dang thats awesome. I don't know why anyone would want to go through all the trouble to put a 6 speed in when you can do the 8/10.
Yes! The nice thing on the 8 speed is your always in the power band and always have power.
Not sure how much power it can manage compared to a 6L80 but i'm sure for our applications, stock will be fine.
That's basically what I have, mounted up high on the firewall. Mine also doesn't hold pressure after the pump is off and I have to either key it twice or change the prime time to refill the lines. I think having the regulator mounted as low as possible is what you want, that way gravity from the fuel in the rails pushes down one side and gravity feed from the tank pushes down the other and the system doesn't drain out when there is no pump pressure.
For the transmissions, I believe that 6L80's, 8L90's and the 10L80/90 all use a 32-spline output and the same 6-bolt transfer case mounting flange. They all use different computers though and the 10L computers are usually encrypted from the factory unless you find an early 2017 version. Holley does not have a solution to control any of these transmissions. Zero Gravity makes a stand alone transmission controller for the 6L80/90 and the 8L90.
TCM-2650 Mechatronic Controller Archives - Zero Gravity Performance
I would be VERY careful about mixing and matching an engine and 10L transmission. There are many combinations that will bolt together but very few correct: engine harness, engine computer, transmission, transmission wiring harness and transmission controller that will function without a massive headache. If I did a 10L transmission (and having driven them I really want one) then I would get the full engine and transmission, wiring harness and both computers from a Pre-2020 GM truck. T-93 controllers (2020+) are no bueno, T-87a can be unlocked, T-87 are not locked, but are 8L90 only.
GM T87A TCM Unlock Services – HP Tuners
Get started tuning GM T87A equipped 2017+ GM 10-Speed and 8-Speed transmissions with HP Tuners' GM T87A TCM Unlock service. Learn more about unlock options.
www.hptuners.com
If you keep the drivetrain intact you may not need to unlock your transmission or even engine controller at all. The more modules you use, especially the body control module and the gauge cluster and you can fool the computers into thinking they are still in the "host" vehicle. That's not really an option for me in my FJ45 because I have no need for the BCM or the fancy gauges, so I would have to at least unlock the engine controller to remove the vehicle anti-theft programming (VATS).
That's basically what I have, mounted up high on the firewall. Mine also doesn't hold pressure after the pump is off and I have to either key it twice or change the prime time to refill the lines. I think having the regulator mounted as low as possible is what you want, that way gravity from the fuel in the rails pushes down one side and gravity feed from the tank pushes down the other and the system doesn't drain out when there is no pump pressure.
For the transmissions, I believe that 6L80's, 8L90's and the 10L80/90 all use a 32-spline output and the same 6-bolt transfer case mounting flange. They all use different computers though and the 10L computers are usually encrypted from the factory unless you find an early 2017 version. Holley does not have a solution to control any of these transmissions. Zero Gravity makes a stand alone transmission controller for the 6L80/90 and the 8L90.
TCM-2650 Mechatronic Controller Archives - Zero Gravity Performance
www.zerogravityperformance.com
I would be VERY careful about mixing and matching an engine and 10L transmission. There are many combinations that will bolt together but very few correct: engine harness, engine computer, transmission, transmission wiring harness and transmission controller that will function without a massive headache. If I did a 10L transmission (and having driven them I really want one) then I would get the full engine and transmission, wiring harness and both computers from a Pre-2020 GM truck. T-93 controllers (2020+) are no bueno, T-87a can be unlocked, T-87 are not locked, but are 8L90 only.
GM T87A TCM Unlock Services – HP Tuners
Get started tuning GM T87A equipped 2017+ GM 10-Speed and 8-Speed transmissions with HP Tuners' GM T87A TCM Unlock service. Learn more about unlock options.
If you keep the drivetrain intact you may not need to unlock your transmission or even engine controller at all. The more modules you use, especially the body control module and the gauge cluster and you can fool the computers into thinking they are still in the "host" vehicle. That's not really an option for me in my FJ45 because I have no need for the BCM or the fancy gauges, so I would have to at least unlock the engine controller to remove the vehicle anti-theft programming (VATS).
Thanks for confirming. I wasn't sure if it was the same 32 spline or not.
The biggest trouble doing a 10L90 I would assume would be speed signal. these transmissions look for speed to operate. If you pulled the drivetrain from a 2019 Gm truck that has the 10 speed along with engine and harness to keep it all together. You'll face an issue with how to adapt the speed sensors to it. the cruisers 100 series and below all read off of the T-case. Unless you go aftermarket, I don't know of a way to get the speed reading correctly.
Would be nice to have the 8 speed though. I'd love better range out of it. It has a diesel that gave me 1200kms out of the two stock fuel tanks. Right now with the 6l80 I'm barely seeing 700km.
Dumb question but is the HF2AV TC just a variant and fine to use with your kit? Guessing so but have to ask.
The kit will require the following:
- * Early 80 (91-94) transfer case shifter base (retainer and shaft). If you have a 95-97 you will need to source this part. PN: 36344-60021
- * Factory adapter/extension housing from A343 transmission 1995-1997 and 6 mounting bolts (this can be used from old drivetrain or source a used one). PN: 35015-60070
- * GM LT Motor L83/ L84/ L86/ L87
- * Factory GM 4WD 8 or 10 speed transmission (8L90 or 10L90)
- * HF2A Transfer case
You can use either HF2A or HF2AV TC
I'm not sure that's an issue. I don't have a 10L system to look at but some google searching showed they use the same input and output speed sensor setup as the 6L and 8L series. The transmission measures input and output speeds internally and sends that data over the CANBUS. The Landcruiser gauge cluster gets it's speed info from the transfer case and you would be adapting that to the back of the 6L/8L/10L using either a Marks, Advanced Adapters or the Torfab kit. The GM computer can be easily programmed for the swap tire size and gear ratio so the speeds match but that's only important for the transmission shift scheduling that works off a vehicle speed table. You might run into some issues if you were trying to keep as many of the stock modules as possible because the transfer case is part of the traction control system in higher spec trucks...but then non of this is really easy!
I stand corrected. I mixed it with the 1VD-FTV swap.
I'll probably do this swap in my 105. I just want to see how involved the wiring will be to do it
Thanks for the feedback
