Has anyone done it? What would it take to make it work?

 

Cannot be done. Also why would you want to? The 1:1 ratio is acheived when the input shaft and the main output shaft is coupled together (this is the only gear that the cluster gear is not being used to transmit torque).

 

As said its impossible. The input shaft is 1-1 simply because when engauged, it becomes locked with the mainshaft and turn at the same speed.

 

Why dont you just skip it and shift to 6th thats essentially what you would be doing by switching the gears anyway...glad I could save you a while bunch of time r/r ing the trans and rebuilding it...your welcome

 

Richmond offers the Richmond 6 speed with a 5th gear of 1 to 1 and 6th has OG.

http://www.jegs.com/i/Richmond+Gear/...626AA/10002/-1

# 6-Speed Overdrive Transmission26-spline input
# Gear Ratios 1st to 6th:
3.28, 2.14, 1.57, 1.24, 1.00, .76

 

The Richmond 5+1 is designed that way specifically. The input shaft sticking out the front of the unit is 5th gear so its basically the same thing as 4th gear on the T56. Instead of having a 2.66 1st gear in the T56 with a lower rear end ratio, Richmond decided to make 1st gear a little lower and recommends that you use a higher gear ratio in the rear end. Instead of splitting the difference from 1st gear to the 1.00-1 rato by 4 like the T56 does, Richmond splits it by 5.

 

I'd like one more gear for drag racing without having to swap out the rear gears for something lower numerically. I've been looking for a 5th 1:1 tranny, but don't know if the richmond/D-N/Gforce tranny's will bolt in and how much mod will have to be done to get their shifters in the same relative position in the tranny tunnel.

 

You are kidding, right? You want to see if you can spend few thousand dollors for a Richmond trans just so you can get the 1:1 5th gear when you can just replace the rear gears for much less? Not to metion what mods you have to do to make that trans to fit. I don't get it........

 

Changing gear ratios in the diff or swapping out for a different size tire is much easier to do. Having to row another gear means even more time added onto your existing ET.

 

I agree, swapping gears is much easier and much much cheaper, no doubt about it. 28" tire is the biggest I can go with the gto before hacking into the 1/4 panel. Gears are 4.11 in a 12 bolt sra swap and trying to keep the 60's down. Looking into the future, I'm trapping upper 130's now and getting close to the limiter. New motor is in the works and want to see all options and possibilities before changing/mating/fabbing anything.

I hadn't been able to find any info on the 5th gear 1:1 so it looks like I found the answer I didn't want to come to grips with.

 

Depending on the engine combo and if there is a power adder, it sounds to me like you need less gear not more. I run a 3.73 gear in my car with a 28" tire and cross the traps at about 6300 rpms on the motor. I plan to put a 100 shot on it so it should be ideal with my tire size and gear ratio. If you are trapping high 130's right now and want to make it go faster, add more power and take a little bit of gear out of the diff but keep the big tire.

 

So, just out of curiosity, were you looking at changing 4th gear also? 4th is 1:1 in the T56.

 

Car is on n2o. Tire will stay the same and gearing will have to go down numerically since tranny gearing is stuck on a 1:1 4th. Prob something in the range of 3:55 or 3.73.

Yes, no sense in having 4th and 5th at both 1:1. If 5th could have been 1:1, I would have put 4th as 1.15-1.3:1

 

Thats what you need. Take some gear out of the car and see if it picks up. I'd bet it does over the 4.11s you have plus the car will leave a little less violent on the juice.

 

Thats what you need. Take some gear out of the car and see if it picks up. I'd bet it does over the 4.11s you have plus the car will leave a little less violent on the juice.

 

Maybe Im missing something but if your saying you are getting close to the limiter through the traps, how is having 5th as 1:1 going to help anything?

4th gear is 1:1 right now, so making 5th gear 1:1 is going to do nothing other than giving you one more gear to shift.

 

could you take the six gear and make it a higher gear for the highway cause i went from 373s to 410s and i lost 5 mpgs

 

Thats what I was thinking... 5th would still be 1:1 and would still turn the same mph and rpm as the 4th gear 1:1.

Theres absolutely no reason to have some kinda close ratio tranny with a 5th gear ratio of 1:1. If you want to change gears an extra time, just cram a ton of gear outback and go to the 5th gear you already have lol. I used to run 4.56's in a car that I didn't want to turn past 6800 rpms because I usually ran 1/8 mile. When I'd go to the 1/4 I'd shift to 5th gear at about 120 mph and cruise till it crossed the traps at around 130mph. Of course it would have been faster with a 4.10 gear in the rear for the 1/4...