PG gear ratio?
 

Looking for some input for first gear ratio. What would you recommend for my car. 2850lbs 383 small block, 29" tire with 4.56 gears. Shifting at 7200 running through the traps at 7000. Cars been 10.20's at 130 foot braking it with 4000 stall glide and a 1.94 gear set. 4 link car. Just loosen the converter to 4800. 8" ATI converter. Smaller, bigger looking for opinions from experience. I'm new to automatics and the gear set broke so I need another one. Thanks, Vinny

Re: PG gear ratio?
 

1.94 or 1.98 should be fine for that combo,loosening the converter will help ALOT 4000 was to tight.

Re: PG gear ratio?
 

Is there a big e.t. difference from 1.80 to 1.94 or is it minimal? At 130 mph should this go into the 9.90 range? Same combo with a stick was going 133 mph.

Re: PG gear ratio?
 

with a 383 and that light of a car just put the stock 1.76 gear set in the car and race if u do try to run the stock 1.82 u will have to pull in out after about 100 runs any more runs chanse of braking it

Re: PG gear ratio?
 

I'm going to trans brake it and I dont think the stock 1.76 gear will last plus I want to break into the 9's and I think it will need more than the 1.76 gear.

Re: PG gear ratio?
 

ow yes 1.76 will last even longer sens u running a small block 383 how much motor u got? I ran 1.76 with 406 for yrs low 10s and never broke in 3300 pound car tried 1.96 gear set and car did not like it to much first gear for the power

Re: PG gear ratio?
 

maybe 550 to 580 hp. Its just a pump gas motor street car. When you switched to the 1.96 what did you loose in 60' and et? What rear gear and tire were you running? I really want to get this thing into the 9's
http://i50.tinypic.com/zlvwx0.jpg

Re: PG gear ratio?
 

lost on 60 and et cant remember how much been so long my car head 4.56 gears and 32-14.5w stiff side wall lunch at 5500 on brake shift at 6500 and 6800 at finsh line

Re: PG gear ratio?
 

Anybody else want to add what gear they run and et?

Re: PG gear ratio?
 

I ran a 355" sbc in a 2860# chevy II with a 1.76 glide 5.67 rear gear. Car went a best of 1.33 60' @ 9.86 and consistent 9.90's @132mph at 8200 rpm in cool weather. I put a 2.03 low gear and 5.43 rear gear. 60' times dropped to 1.30-1.29 and ran basically the same E.T. and mph at 7900 rpm. You will have more rpm drop at gear change with the lower gear ratio. Car has a 8" 5800 convertor and a 15" x 33" 105" roll out. I leave with the trans brake at 4200 rpm. The car was more consistent with the 2.03 low gear due to being able to transfer the weight better, and a whole lot more fun to drive! The 2.03 broke after about 350 runs. I put the good old reliable 1.76 back in for now! Hope this helps.

Re: PG gear ratio?
 

When you guys say the 1.76 gear set, is it a stock used gm gear set with the stock carrier and out put shaft? One option I'm thinking about is a 1.80 straight cut gear by transmission specialties in P.A. The whole tranny is $1600 PL-2500

Re: PG gear ratio?
 

I would go with the 1.98.... now then in a "stocker" we picked up .15 going from a 1.82 to a 2.08!

Re: PG gear ratio?
 

T-200. I would bet it would drop it to a solid 9.90 over your current set-up. Right now. But what do I know, I'm a stick guy.

Re: PG gear ratio?
 

My Camaro (good 364, 5.13 gear, 10.5 tire, 3350wt) worked and ETd much better with 1.76.

Re: PG gear ratio?
 

Jeff, dont get me more confused. I used to be a stick guy remember on UMTR. I had the 67 vette with a pro shifted super T-10. Then I ran the this vega with the nash 5 speed. I miss the stick but it was a pain in the *** to drive on the street with the Long inline shifter. Now I'm running the 80 vette.
http://i47.tinypic.com/2j6720y.jpg

Re: PG gear ratio?
 

I realized that. You didn't drive it on the street that much did you?

Since you have made it race only (correct?), go all out with gearing and weight removal.

Re: PG gear ratio?
 

I drove it enough where it was a pain in the ***. Every friday night to the hang out spot. Still trying to crack the 9's.

Re: PG gear ratio?
 

Thanks for all the replies. I went and bought the Transmission specialties PL2500. 1.80 straight cut gear. I should have it tomorrow. For what it has in it I couldnt pass it up. $1499

$1,499.00
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-NEW dual ring billet servo
-NEW deep alluminum pan
-NEW Pro Lite trans brake
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The PL-2500 is one of our best sellers offering all the KEY internal components.

Re: PG gear ratio?
 

IMO, you made a great choice. That is an outstanding deal! I think the 1.80 gear is just about ideal for 355-555 inch engines. Bracket stuff, not class cars.

Just remember to stay on top of the band adjustment. I'd check it before every event.

Have fun.

Re: PG gear ratio?
 

The band they use is the stock band. I spoke to them about this and they feel that the stock band is very good and holds up just as good as the kevlar band and it doesnt need adjusting as much as the kevlar. How should it be adjusted anyway? This is my first glide besides the one that just broke and I only made 4 passes with it.

Whats the difference between bracket cars and a class cars?

Re: PG gear ratio?
 

L79, the adjustment calls for tightening the screw to 72 inch pounds and then backing out 4 turns. I think it was 63 corvette (Rick ?)that suggests just snugging it down and backing out 3.5 turns and that sounds perfect to me. You'll probably find that it doesn't change much after initial break in. I only mentioned keeping an eye on it, because I got lazy (well, in all honesty, I was lazy all along) and it bit me right in the stage light. Set the trans brake and rolled backwards, redlighting. Wasn't much Kevlar left on the band. Also, I don't think the Kevlar is a must; the stock lining works pretty well in some applications.

What I meant by 'bracket stuff' was to differentiate from class cars that may be relatively heavy and running smaller engines with less stroke. Those are the cars that need the deeper gear in the P/G. I'm using an ATI straight cut 1.87 behind a 406" @ 3250 lbs. Kinda wish I'd gone with the 1.80

Re: PG gear ratio?
 

Ken, thanks for the info. I'll keep up on the band. Go the new tranny in last night. I cant wait to try it out but were getting a blizzard here on Long Island this weekend. I'll have to wait until warmer weather. This Vette with a 4 link should 60' at least mid high 1.30's