2.28 first gear ?
#590553
01/21/10 11:25 PM
01/21/10 11:25 PM
|
Joined: Feb 2006
Posts: 698
Alberta Canada
Edge
OP
mopar
|
OP
mopar
Joined: Feb 2006
Posts: 698
Alberta Canada
|
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
76 Duster
work in progress
|
|
|
Re: 2.28 first gear ?
[Re: Edge]
#590555
01/22/10 10:33 AM
01/22/10 10:33 AM
|
Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,928
NC
|
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
|
|
|
Re: 2.28 first gear ?
[Re: 440Jim]
#590557
01/22/10 11:25 AM
01/22/10 11:25 AM
|
Joined: Feb 2006
Posts: 698
Alberta Canada
Edge
OP
mopar
|
OP
mopar
Joined: Feb 2006
Posts: 698
Alberta Canada
|
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
76 Duster
work in progress
|
|
|
Re: 2.28 first gear ?
[Re: HardcoreB]
#590559
01/22/10 01:48 PM
01/22/10 01:48 PM
|
Joined: Mar 2008
Posts: 573
PA
68CudaB1
mopar
|
mopar
Joined: Mar 2008
Posts: 573
PA
|
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... 
|
|
|
Re: 2.28 first gear ?
[Re: 68CudaB1]
#590560
01/22/10 02:11 PM
01/22/10 02:11 PM
|
Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
|
super stock
Joined: Jun 2009
Posts: 705
Michigan
|
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. 
|
|
|
Re: 2.28 first gear ?
[Re: Hemiroid]
#590561
01/22/10 03:00 PM
01/22/10 03:00 PM
|
Joined: May 2007
Posts: 636
Central,Ohio
FASTFISH420
mopar
|
mopar
Joined: May 2007
Posts: 636
Central,Ohio
|
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..
1969 Barracuda 8 second all/motor small block
2014 Shelby GT500 Mustang
Uratchko Racing Engines
www.URE-RACING.com
|
|
|
Re: 2.28 first gear ?
[Re: FASTFISH420]
#590562
01/22/10 03:39 PM
01/22/10 03:39 PM
|
Joined: Mar 2008
Posts: 573
PA
68CudaB1
mopar
|
mopar
Joined: Mar 2008
Posts: 573
PA
|
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 
|
|
|
Re: 2.28 first gear ?
[Re: Hemiroid]
#590563
01/22/10 03:46 PM
01/22/10 03:46 PM
|
Joined: Mar 2008
Posts: 573
PA
68CudaB1
mopar
|
mopar
Joined: Mar 2008
Posts: 573
PA
|
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.
|
|
|
Re: 2.28 first gear ?
[Re: 68CudaB1]
#590564
01/22/10 05:00 PM
01/22/10 05:00 PM
|
Joined: Jun 2006
Posts: 259
Canada
lenweiler
enthusiast
|
enthusiast
Joined: Jun 2006
Posts: 259
Canada
|
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.............
Damn! I dropped my change.............
|
|
|
Re: 2.28 first gear ?
[Re: 68CudaB1]
#590565
01/23/10 11:54 AM
01/23/10 11:54 AM
|
Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,928
NC
|
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.
|
|
|
Re: 2.28 first gear ?
[Re: 68CudaB1]
#590566
01/23/10 11:56 AM
01/23/10 11:56 AM
|
Joined: May 2007
Posts: 636
Central,Ohio
FASTFISH420
mopar
|
mopar
Joined: May 2007
Posts: 636
Central,Ohio
|
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
1969 Barracuda 8 second all/motor small block
2014 Shelby GT500 Mustang
Uratchko Racing Engines
www.URE-RACING.com
|
|
|
|
|
