1g verses 2g auto's

[rrussell]

What are the pros and cons of both these transmissions?

 

[TURBOGSX]

1g has the button to firm up shifts the 2g duz not thats about all i know.That was im my awd tsi 92versus my 95

 

[TunaTalon]

The 2G has a lock up torque converter that improves mileage.
The 1G does not have a lock up torque converter that can fail.

 

[Car Cannibal]

2G still has a real performance torque converter made for it by Precision Industries that has a 3 disc clutch inside that you can lock at the track for 100% efficiency.

And you can install the 2g trans with this converter in your 1g, friend did it this summer along with a stock shifter tranny box.

 

[webconnect]

How do you lock it up?

 

[chrish1440]

2G still has a real performance torque converter made for it by Precision Industries that has a 3 disc clutch inside that you can lock at the track for 100% efficiency.

And you can install the 2g trans with this converter in your 1g, friend did it this summer along with a stock shifter tranny box.

I'm confused, why would you need a lock up converter for the track?

 

[HighPSI TSi Guy]

I'm confused, why would you need a lock up converter for the track?

To break stuff.

 

[Car Cannibal]

Tell that to all the GN guys that lock the same Precision Converter up at the track in 3rd and gain anywhere from 2-3mph before and after.

Finally we'll have a 1G with a 2G trans dyno and track times to put this crap to bed so the DSM crowd can catch up to 1987.

 

[HighPSI TSi Guy]

Tell that to all the GN guys that lock the same Precision Converter up at the track in 3rd and gain anywhere from 2-3mph before and after.

Finally we'll have a 1G with a 2G trans dyno and track times to put this crap to bed so the DSM crowd can catch up to 1987.

Track times i'd be interested in, Dyno numbers are worthless.

I can't count how many auto cars I've dynod that dyno stupid low numbers due to converter skew on the dyno then they go and lay down a time at the strip that reflects much more power. I've seen a cars change converters, lose 40whp on the dyno back to back, then go 4mph faster at the strip. I'm more interested to see how much power it'll take before that lockup clutch gets smoked.

Though I have a feeling there is already someone on here who knows all these answers because he's already done the swap a long long time ago.

Are you manually turning on the lockup or did you wire up a 2G TCU?

 

[Car Cannibal]

The dyno before and after though gives you an idea of what you're losing through the converter, the converter coupler issues still apply.

1 disc lock ups were running 11's in GN's and the Precision 2G is a 3 disc. I'm sure it will be fine for a 10 second DSM for sure, but beyond that it's all test and tune for use since the GN guys have a 5 disc and have gone 9's locked. One member has locked his up over 200 times at the strip and is still seeing 100% efficiency in an 11 second car. I'd chalk up a clutch rebuild of a couple hundred bucks to any other race oriented beating we deal with

My buddy ran with my idea of doing the 2G swap and is an electronics guy by trade and made a kick ass setup that plugs into the trans itself and then the stock shifter. He manually shifts with the shifter and activates the lockup via any button you want on the car. It eliminates the TCU and wiring during the swap.

I'll see him Thursday and Saturday for tuning and launch beatings on the tranny.

Anyways, I firmly believe the 2G trans is much better for all levels of DSM's, better gas mileage and a proven race converter at $925 that will do what you want and paid for.

 

[HighPSI TSi Guy]

My point about the dyno numbers is that you're not actually losing the power that shows up missing on the dyno. My car from a roll is proven no slower than it was as a 5 speed but i'd bet it dynos 50-70 lower as an auto. Hence my example of the car "losing" 40whp then picking up 4mph. That was back to back track and dyno, before and after. The "missing" power is an illusion due to false loading by the roller. It skews the converter slip such that it throws the numbers way off. You can tell when you drive the car on the dyno the converter behaves different.

Reason I asked about the TCU was because I had an idea of putting a 2G auto in my beater 1G for the gas mileage difference over the 1G trans and had drawn up an elaborate wiring scheme to make the 2G TCU work in the 1G but never went through with the idea. Kept it a 5 speed when gas prices went through the roof.