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Old 05-22-2018, 10:42 AM   #29
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Originally Posted by RideZX6R View Post
Sounds like you could (potentially) use the OEM SS A10 ancillary parts and then the ZL1 A10 itself for the added strength.


Overall for me... the idea would be to have the lightest V8 chassis available (1SS 1LE) with the best track (and street?) transmission.

The problem with the ZL1 is the extra 300lbs it has in supercharger and accessories. Sure you can strip weight out of both cars... but if you start with the lighter car to begin with, it'll still be lighter at the end
Yup. As I've been reading through this post, that is one of the first things that came across my mind. Having come from a 2016 2SS A8, I am astutely aware of what the 8 speed is capable of and as much as I love driving a manual transmission again, a 10 speed in my 1LE would be downright vicious. Count me in as interested.
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Old 05-22-2018, 10:48 AM   #30
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You could also just go with a 8l90 and a Circle D converter. Be a lot cheaper then the $14,000 10l90 and just as effective. Remember the A8 issues are tq converter and tuning related. The trans itself is pretty damn capable imo.
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Old 05-22-2018, 10:49 AM   #31
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I would love to see how this works out, and to see a a10 1LE would be AWESOME!

There are a few shops that have done LT4 swaps, they must have a handle on where to begin and cost of labor at least.
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Old 05-22-2018, 04:32 PM   #32
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You could also just go with a 8l90 and a Circle D converter. Be a lot cheaper then the $14,000 10l90 and just as effective. Remember the A8 issues are tq converter and tuning related. The trans itself is pretty damn capable imo.
Post #14 said price from GM is $6500, although I assume that was probably just the transmission. Then you need the wiring harness, TCM, convertor, a few other items and tuning.
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Old 05-22-2018, 08:29 PM   #33
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Post #14 said price from GM is $6500, although I assume that was probably just the transmission. Then you need the wiring harness, TCM, convertor, a few other items and tuning.
I read somewhere else that it was more...either way you can buy a 8l90 with controller designed to retrofit other vehicles for 5k.
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Old 05-25-2018, 08:14 PM   #34
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I understand the 8l90 would be easier to put in but that's not really the whole idea plus if your going to spend the money what another couple thousand.

The point of putting the 10l80/90 in would be to get the faster and more precise paddle shifts and to have more gears for road coarse or track if your going for a ss 1le a10.

If I had the money I would have already done it because I like challenges.
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Old 05-26-2018, 07:06 AM   #35
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When I looked at the gearing, in paring an a10 to the 3.73 rear, this would probably require also changing the eLSD to the ZL1's 2.85 ratio, otherwise first gear will be useless and probably too many shifts would occur at the strip, so this is looking less practical to me, unless I am missing something.
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Old 05-26-2018, 10:53 AM   #36
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Just wondering if anyone has looked into this?

Seems likely to bolt in as the ZL1/LT4 bolt pattern is the same and there is no clearance/fitment differences that I'm aware of

I'd assume you'd need the trans, BH, converter, wiring and TCU and then a flash... Has anyone done it yet or looked into it?
Buy a factory equipped 10 speed. Waste of money converting from 8 speed to a 10 speed with limited gains and depends what your using your car for.

Hers a good read from a guy that knows his stuff.

“Realistically, there is very little performance or efficiency benefits from having above 6-gears and especially 8-gears. 99% of the efficiency benefits from the new 10-speed stems not from have two extra gears, but from the increased ratio spread (from 7:1 to 7.39:1) and reduced internal friction from the ultra-low viscosity fill. The widened ratio spread allows for lower rpm cruising without a taller effective 1st gear overall ratio that hampers acceleration. The low viscosity fluid reduces frictional losses. The actual efficiency or performance benefits from having closer gearing steps is dubious at best. The marginal benefits to being in more ideal ratios more often is offset by more frequent shifts and power delivery interruptions. One can make a reasonable case that a 6-speed automatic with the same ratio spread and similar friction reduction will be just as efficient and allow the vehicle to accelerate just as well. This is evidenced by the prevalent habit amongst 7 to 10 speed automatics to skip gears when upshifting or to start in 2nd.



Why then 8 or 10 speed autos you may ask? Marketing is one reason, but the other more engineer relevant problem is that if you want to have a wider ratio spread, you can either have a larger planetary gear sets or you can have more planetary gear sets (more reduction steps). A larger diameter transmission is a non-starter because it intrudes in the foot well and/or drive tunnel. With more gear sets you naturally have the ability to have more gearing combinations (speeds) and it becomes a simple choice between using or not using all (or most) of the available combinations. Most designers and manufacturers then choose to use them rather than fuse off various intermediate ratios.’

If you want to waste money and time, go for it. Good luck!!!
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Old 05-26-2018, 12:47 PM   #37
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Waste of money converting from 8 speed to a 10 speed with limited gains and depends what your using your car for.
This thread was not about converting from 8 speed to 10 speed automatic, but for converting M6 1LE's to the ZL1s a10.
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Old 05-26-2018, 01:40 PM   #38
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I would really like to convert a ZL1 1LE to an A10
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Old 05-26-2018, 02:37 PM   #39
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This thread was not about converting from 8 speed to 10 speed automatic, but for converting M6 1LE's to the ZL1s a10.
Okay my mistake, then if op wants to convert manual to A10 that’s another ball game.

I did a 1970 auto to manual 4 speed years ago. I can understand that process it’s pretty simple but cars now adays I would not touch it. Better to sell his current car and mod 1SS or ZL1 Auto with adding the 1LE package. Converting manual to A10 in a GEN 6 would be asking for trouble in regards to time consuming and wasted money. Just my opinion. Pipe dream, just buy a current ZL1 with A10.
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Old 05-26-2018, 03:01 PM   #40
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a friend just had his A10 overheat at COTA, but it was a 95 degree day, just in case your considering track use. This was the first time he's had an issue
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Old 05-29-2018, 11:13 PM   #41
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There are plenty of trucks out there with 10 speeds already that you could potentially get at a junkyard. Wont be the robust trans out of the ZL1 but you should be fine. The camaro 8 speeds are the same as the truck 8 speeds (slip yoke) and they can handle a shit ton of torque for a stock trans so I'd imagine a truck 10 speed would be good as well. Not sure about the torque converter difference. The trucks I mention are both chevy and ford, not sure if the ford is any different with the TCM wiring but internally they should be the same.
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Old 05-30-2018, 08:27 PM   #42
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The transmission out of a truck would be fine but it would have to be two wheel drive or otherwise the tailshaft is setup for a transfer case not a driveshaft.
The Ford trans isn't the same because Ford uses a different bell housing bolt pattern then Chevy so only a chevy trans would work.

This isn't a bad idea but the 10l80 out of a two wheel drive truck will probably be as hard to find as a 10l90 out of a ZL1.
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