[Va68goat]

Well, you guys have been spot on with all your other suggestions. I went ahead and got the TH400. It's being built now. I think between that trans and what gtofreek (Paul) is building me, I should be in great shape. My car does have 3.55 gears and I recently received my Year One wheels. Went with 245/45/17 for the front and 275/40/17 for the rear. I've been working on the car pretty hard lately to have it ready for the trans and the motor. All of this is very new to me and I really do appreciate all the help from you guys. I should have started messing with cars a long time ago. At least I'm learning a lot now though. Thank you all again!

[pontibeast]

Originally Posted by Va68goat

Well, you guys have been spot on with all your other suggestions. I went ahead and got the TH400. It's being built now. I think between that trans and what gtofreek (Paul) is building me, I should be in great shape. My car does have 3.55 gears and I recently received my Year One wheels. Went with 245/45/17 for the front and 275/40/17 for the rear. I've been working on the car pretty hard lately to have it ready for the trans and the motor. All of this is very new to me and I really do appreciate all the help from you guys. I should have started messing with cars a long time ago. At least I'm learning a lot now though. Thank you all again!

I have the same size tires as you with a TH400 and 3.55 gears. It has a 3000 stall Continental converter and I had my carb and cam setup to work with the rest of the car. I run at about 2900-3000 rpm's at 60 mph. It doesn't bother me for 1-2 hour trips but some might find it a little loud. If I was doing a lot more highway trips or on roads where the speed limit is 70 I would probably go with a 3.08 gear. I do drive on highways where the speed limit is 65 but I just get in the right lane and do 60. I'm sure I piss some people off that think 65 means 75 or 80 but I don't worry about it. In VA you have to maintain a speed no lower than 15 mph of the limit so going 5 mph under is legal and if other people stress about it then let em. I had a 350 with this combo but now I am putting a 455 in it so I might make a change, just have to feel it out.

[Hardkor455]

Why even drive a pontiac then. 60 in the slow lane. Disgraceful

[chuckies76ta]

Originally Posted by Va68goat

Well, you guys have been spot on with all your other suggestions. I went ahead and got the TH400. It's being built now. I think between that trans and what gtofreek (Paul) is building me, I should be in great shape. My car does have 3.55 gears and I recently received my Year One wheels. Went with 245/45/17 for the front and 275/40/17 for the rear. I've been working on the car pretty hard lately to have it ready for the trans and the motor. All of this is very new to me and I really do appreciate all the help from you guys. I should have started messing with cars a long time ago. At least I'm learning a lot now though. Thank you all again!

Good decision with the TH400. Very strong transmission as everyone knows, and cheap to build or service.


Having said that your car will be a blast on the street light to light, but I suspect traction will be an issue with 3.55 gears and a 26" tire.



You will need the 3.08 gear to tame it down, but with the 455 making 500hp, the 26' tire and TH400 it will cruise nice and still be a blast on the street. I suspect traction will still be an issue.



Just my .02

[Va68goat]

chuckies76ta,
Well, it's been over 2 years since I posted this thread and my car just got on the road a few months ago. I had a 2 year knocking noise that was finally resolved. The car drives great from light to light but I haven't driven it on the highway yet. I have gotten it up to 60-65 mph and it's a little over 3,000 rpm's. I was considering doing the 4L80E but after this nightmare of an engine, I may just have to switch to 3.08 gears.