My 1998 Pontiac Trans Am - Page 2 - TriStateTuners.com :: Home of Tristate Auto Enthusiast

jpalamar · 08-20-2010, 10:37 AM

I wouldn't do an auto unless it was an A6. I really wish the C6 Vette autos would work with a GTO and I would get rid of my M6 tomorrow.

White.Lightning · 08-20-2010, 11:05 AM

I was originally going to do a TH400 3 speed with no overdrive. The 4L80e's are fine. It's an overdrive trans and since the gearing will be relatively low in the rear end, rpms wont get out of control. The 4L80e is basically a TH400 with overdrive. 4L80e's have been into the 7 second ET range while still providing overdrive for cruising/highway.

SleeperGoat · 08-20-2010, 12:55 PM

They cost a crazy amount to build up though compared to a TH transmission an god forbid after it's done you jump on it while it's in OD you'll be sendings parts all over the highway. I guess it also depends on how much power your looking to put down my tuner drove his into the high 8s.

White.Lightning · 08-20-2010, 01:36 PM

I can get a fully built TH400 for $1300 and a fully built 4L80e for $1500. It's a no brainer for me.

denmah · 08-21-2010, 07:33 AM

Quote:

Originally Posted by White.Lightning

Guesstimate of power would be 420rwhp 400rwtq

let me know if you ever want to find out what it puts down to the wheels

08-20-2010, 10:37 AM	#21
jpalamar TST Ruined My Life! Join Date: May 2009 Location: Orefield, PA Member #13773 My Ride: '14 Mustang GT iTrader: (3)	I wouldn't do an auto unless it was an A6. I really wish the C6 Vette autos would work with a GTO and I would get rid of my M6 tomorrow. __________________ 2014 Mustang GT performance package, M6, Brembo brakes, Torsen diff with 3.73, Steeda CAI with 101mm MAF, ST coilovers with caster/camber plates, BMR lower control arms, BMR watts link, BMW sway bars with end links, front brake cooling ducts, SR short shiffter, and custom tuned

08-20-2010, 11:05 AM	#22
White.Lightning Tri-State Aficionado Join Date: Dec 2008 Location: Aston, PA Member #10440 My Ride: 1998 Pontiac Trans Am iTrader: (0)	I was originally going to do a TH400 3 speed with no overdrive. The 4L80e's are fine. It's an overdrive trans and since the gearing will be relatively low in the rear end, rpms wont get out of control. The 4L80e is basically a TH400 with overdrive. 4L80e's have been into the 7 second ET range while still providing overdrive for cruising/highway. __________________ '98 T/A To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

08-20-2010, 12:55 PM	#23
SleeperGoat Tri-State Post Whore Join Date: Jan 2007 Location: Dolyestown-Pa Member #3339 My Ride: 84 Camaro/ 05 GTO iTrader: (0)	They cost a crazy amount to build up though compared to a TH transmission an god forbid after it's done you jump on it while it's in OD you'll be sendings parts all over the highway. I guess it also depends on how much power your looking to put down my tuner drove his into the high 8s. __________________ formerly BlackZ05 05 Nissan 350z- Sold! 84 Camaro- Project from Hell car now Stripped an being Sanded.....Slowly no weekend life anymore 05 GTO - Push Button Performance w/ spooling action

08-20-2010, 01:36 PM	#24
White.Lightning Tri-State Aficionado Join Date: Dec 2008 Location: Aston, PA Member #10440 My Ride: 1998 Pontiac Trans Am iTrader: (0)	I can get a fully built TH400 for $1300 and a fully built 4L80e for $1500. It's a no brainer for me. __________________ '98 T/A To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.