2.28 first gear ?

Posted By: Edge

2.28 first gear ? - 01/22/10 03:25 AM

Anyone running a 2.28 first gear ratio in there 727 ? Considering going to this ratio to reduce torque multiplication to make launching a little more consistent. Any experience with this switch ? Car will have 4.56 with 33 tall tire 572 B1 motor in a duster (roughly 2900 lbs at starting line)

thanks

Posted By: Dodgem

Re: 2.28 first gear ? - 01/22/10 12:53 PM

That plan sounds good to me??

Posted By: 440Jim

Re: 2.28 first gear ? - 01/22/10 02:33 PM

I have considered it for my car too.

The cost needs to be compared to switching to a PG trans, which should also work in our application. The PG change will be costlier, but that gear set for a 727 could go a long way toward the conversion.

Two sources of alternative ratios for the 727:

http://www.aandatrans.com/
http://www.gotranzact.com/

I exchanged a couple emails with TranzAct last fall, but he wouldn't answer two questions important to me.
1) What price do they charge
2) Do they have parts on the shelf to ship, or will I wait...

From A&A website:
727 5-Gear Steel Front Straight Cut Planetary and 4-Gear Aluminum Rear Planetary 2.28/1.45/1:1
$1,750.00

Posted By: HardcoreB

Re: 2.28 first gear ? - 01/22/10 03:03 PM

There was someone here, I think it was B1Cuda out of Pennsylvania, that was having issues with alternative 1st gear ratios out of TranzAct(?). Please correct me if I am mistaken but, someone here did post their troubles.

Posted By: Edge

Re: 2.28 first gear ? - 01/22/10 03:25 PM

thanks, I have been talking with Pro Trans about the gear set, I like my TF just want to settle the launch down and I am not sure that I need to go with straight cut gears
from what I understand I can simply replace the rear planetary with a 4 gear billet carrier with the new ratio

Posted By: Cab_Burge

Re: 2.28 first gear ? - 01/22/10 04:47 PM

Quote:

thanks, I have been talking with Pro Trans about the gear set, I like my TF just want to settle the launch down and I am not sure that I need to go with straight cut gears
from what I understand I can simply replace the rear planetary with a 4 gear billet carrier with the new ratio

How soon and how much from Pro Trans?

Posted By: 68CudaB1

Re: 2.28 first gear ? - 01/22/10 05:48 PM

Quote:

There was someone here, I think it was B1Cuda out of Pennsylvania, that was having issues with alternative 1st gear ratios out of TranzAct(?). Please correct me if I am mistaken but, someone here did post their troubles.

It was us that had all the problems, I dont recommend 2.28 gears on a high tq engine, we never got more than 60' without breaking something. Ended up going w/ a glide and have been very, very happy...

Posted By: Hemiroid

Re: 2.28 first gear ? - 01/22/10 06:11 PM

Quote:

Quote:

There was someone here, I think it was B1Cuda out of Pennsylvania, that was having issues with alternative 1st gear ratios out of TranzAct(?). Please correct me if I am mistaken but, someone here did post their troubles.

It was us that had all the problems, I dont recommend 2.28 gears on a high tq engine, we never got more than 60' without breaking something. Ended up going w/ a glide and have been very, very happy...

Chuck from Best Machine ran 2.28 gears in his AM car with a 572" B1-MC motor running 8.50's at 3350 lbs and believe he had good luck with it once the trans was built right.

Posted By: FASTFISH420

Re: 2.28 first gear ? - 01/22/10 07:00 PM

I ran a 2.28 gearset for years behind a 572..and it worked fine..I switched back to the 2.45..the car was heavy at 3350..and liked the stock gear better..

Posted By: 68CudaB1

Re: 2.28 first gear ? - 01/22/10 07:39 PM

Quote:

I ran a 2.28 gearset for years behind a 572..and it worked fine..I switched back to the 2.45..the car was heavy at 3350..and liked the stock gear better..

IF your 572 liked a 2.45 better, you were not making enough power

j/k

We ran a best of 8.84 with the 727 and switched to a Glide and went 8.61 @ 160 at 3375# with a car that left like a baby

Posted By: 68CudaB1

Re: 2.28 first gear ? - 01/22/10 07:46 PM

Quote:

Quote:

Quote:

There was someone here, I think it was B1Cuda out of Pennsylvania, that was having issues with alternative 1st gear ratios out of TranzAct(?). Please correct me if I am mistaken but, someone here did post their troubles.

It was us that had all the problems, I dont recommend 2.28 gears on a high tq engine, we never got more than 60' without breaking something. Ended up going w/ a glide and have been very, very happy...

Chuck from Best Machine ran 2.28 gears in his AM car with a 572" B1-MC motor running 8.50's at 3350 lbs and believe he had good luck with it once the trans was built right.

I remember he was having some issues along the way......I also think he utilized an A&A gear set. A&A/Pro Trans etc will also tell you that the 2.28 gear set is not as strong as a 2.45 and they become vulnerable around 800 ft/lbs of torque.

Posted By: lenweiler

Re: 2.28 first gear ? - 01/22/10 09:00 PM

I run it in my sb stroker Dart. I've had other issues

so I can't say that it helped. However. That being said, I don't run a lot of gear, and I didn't lose any top end mph, gained likely; and I do like the dig with the speed.............

Posted By: 440Jim

Re: 2.28 first gear ? - 01/23/10 03:54 PM

Quote:

A&A/Pro Trans etc will also tell you that the 2.28 gear set is not as strong as a 2.45 and they become vulnerable around 800 ft/lbs of torque.

Wow, good to know. I thought the whole idea behind going from 2.45 to 2.28 was because you had lots of torque! I guess in a lighter car (less than 3000?) it might survive better than 800 ft-lbs in a 3700 lb car.

Posted By: FASTFISH420

Re: 2.28 first gear ? - 01/23/10 03:56 PM

It was a low budget motor..made around 850...all out of the box stuff with -1's..

Best pass with that motor was a 9.31 at 145..at 3310..wish I had it back..LOL