View Full Version : G56 trans

06-16-2009, 08:35 PM
How do you guys like the transmission? How are they holdin up? I'm thinkin about one to pull 25k gcvw. Better or worse than the ole getrag 5 speed?


robert chilton
06-17-2009, 05:00 AM
Great transmission. The only weaknesses are excessive (600 HP) and third gear is the smallest in the trans. Major downside is the price of parts and the clutch doesnt take to added power well. I love both my G56s and have had no problem what so ever with them. Gearing is awesome for pulling also, but I wouldnt go lower than 4.44 and get the 4.10s if ya can.

06-17-2009, 06:49 PM
How do you think the 410's will work pullin 25k gcvw? I do want to try to get as good mileage as I can get but need to pull a 15k camper. I'm not real comfortable with an automatic. I just think I have more control with the stick and the ex brake. Do you think I will need to get a pyro if I towe? I plan to stay stock. At least I want to try it that way. I don't need a screamer just a puller.

07-14-2009, 06:34 PM
IMO the best way to go would be 4.44's and add a GearVendors to it.


07-14-2009, 07:43 PM
i have it on both trucks and i run 3:73's and pull 20k all trhe time no problems other then i dont like the early od ratio

robert chilton
07-15-2009, 01:22 PM
Rich, that is funny cause I really prefer the early ratio trans other than the OD. Got the early model with 3.55s in my 95 and it turns about 100 more RPM than my nv5600 3.73 trucks at 70 MPH.
Gear vendors is a good option but pricey. I would say close to 4 grand when all is said and done. Not to mention at its limits in a 5500. I would look into an auxilary trans from a big truck. Some have a .75 OD and others .85 OD. All in what ya want and if you are into fabricating. I picked up a Spicer 7041 and will be stabbing under the 5500 in a few months. Just started to order the small parts to make it work. Will be doing the install with the upgraded clutch.