8 3/4 and a 4spd

Rod Greene · 09-16-2017, 12:30 PM

Considering your engine choice, ANYTHING that reduces rotating drag will be of value

That is why a Dana is a better choice. Economics, Durability and Drag. A Dana can be built for virtually the same money, it will never break and it is worth ET. Seems like a no brainer, but that is just me.

GTX JOHN · 09-16-2017, 01:52 PM

I agree with Rod ......... I have never had great success with a 4 speed and
slicks with even a good 8 3/4. Now that we run two steps we are eliminating them from about everything. I have broken several 8 3/4s
before two steps even in our 318 O/SA ( Even with Pro Gears and braced
Housings ). The cost difference is not very much between the two alternatives.

Chris DeGidio · 09-16-2017, 03:11 PM

A good hooking car with a 4-speed will kill a 8 3/4. We used the original 8 3/4 in the Road Runner(4-speed) and killed it,went with Dana 60 car ran the same. Demon had 8 3/4 and 727,broke it too,put a Dana 60 in it and never worried again on rear end stuff.

You will spend more beefing a 8 3/4 than just going to a Dana 60 in the first place. Plus like I said,one less thing to worry about.

House of Darts · 09-16-2017, 03:54 PM

I was looking at my inventory and I have several 8 3/4 on the shelf. I also have a Dana 60 from a newer Ram truck. It looks a little different from one in storage that is from an older car probably a RR. Dana is a Dana by NHRA rules? No modern 9" rear for older cars vs New Drag Packs and I know you can't use the Moser sheet metal 8 3/4. Just want to make sue before going in that direction.Although I still have second thoughts and questions about using the 8 3/4. I had one in a B/A car with clutchflite and a wedge motor and it never broke.

randy wilson · 09-16-2017, 04:02 PM

A friend of mine put an 8 and 3/4 under his F body, ran it two years, never broke it. High 10's in the quarter at 3,100 lbs. just my experience.

Kris · 09-16-2017, 09:14 PM

Depends on flywheel. If it's a steel 30# it will not stand up, rip the teeth off the ring gear. Something with adjustability maybe you can make it work. Good luck

James L Miller · 09-16-2017, 09:16 PM

Well, as Emily Litella used to say, "Never Mind".

I'll probably use the 8-3/4" in my Dart with the 273 but will have a 904TF to cushion the blow.

Rod Greene · 09-16-2017, 10:15 PM

By the time you do all the 8 3/4 fixes you will realize you coulda had a Dana. But by all means put an 8 3/4 in it. If you want to clean out your 8 3/4 parts supply. Always enough money to do it over but never enough money to do it right.

Frank Castros · 09-16-2017, 10:19 PM

Dana, set it and forget it.

T Ames · 09-17-2017, 04:51 PM

Another vote for the Dana 60. You will not regret going with the Dana. The 8 ¾ might hold up in your application for a while, but the likelihood of breakage is probably good. Have a small block stocker with a Jerico, and have had zero issues since installing the Dana 60. Can’t tell you how many 8 ¾ gear sets I broke before the Dana (slow learner). Also, there’s another Class Racer thread about the efficiency of the Dana 60 vs. other axles due to its hypoid gear pressure angle – Mr. Greene alluded to that. Another bonus!

09-16-2017, 12:30 PM	#1
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 530 Likes: 429 Liked 242 Times in 81 Posts	Re: 8 3/4 and a 4spd Considering your engine choice, ANYTHING that reduces rotating drag will be of value That is why a Dana is a better choice. Economics, Durability and Drag. A Dana can be built for virtually the same money, it will never break and it is worth ET. Seems like a no brainer, but that is just me. __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.

09-16-2017, 01:52 PM	#2
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,736 Likes: 2,808 Liked 2,488 Times in 698 Posts	Re: 8 3/4 and a 4spd I agree with Rod ......... I have never had great success with a 4 speed and slicks with even a good 8 3/4. Now that we run two steps we are eliminating them from about everything. I have broken several 8 3/4s before two steps even in our 318 O/SA ( Even with Pro Gears and braced Housings ). The cost difference is not very much between the two alternatives. __________________ John Irving 741 Stock 741 Super Stock

09-16-2017, 03:11 PM	#3
Chris DeGidio Member Join Date: Jun 2007 Posts: 364 Likes: 8 Liked 2 Times in 2 Posts	Re: 8 3/4 and a 4spd A good hooking car with a 4-speed will kill a 8 3/4. We used the original 8 3/4 in the Road Runner(4-speed) and killed it,went with Dana 60 car ran the same. Demon had 8 3/4 and 727,broke it too,put a Dana 60 in it and never worried again on rear end stuff. You will spend more beefing a 8 3/4 than just going to a Dana 60 in the first place. Plus like I said,one less thing to worry about. __________________ Nautilus Racing

09-16-2017, 03:54 PM	#4
House of Darts Member Join Date: Mar 2007 Posts: 346 Likes: 19 Liked 20 Times in 15 Posts	Re: 8 3/4 and a 4spd I was looking at my inventory and I have several 8 3/4 on the shelf. I also have a Dana 60 from a newer Ram truck. It looks a little different from one in storage that is from an older car probably a RR. Dana is a Dana by NHRA rules? No modern 9" rear for older cars vs New Drag Packs and I know you can't use the Moser sheet metal 8 3/4. Just want to make sue before going in that direction.Although I still have second thoughts and questions about using the 8 3/4. I had one in a B/A car with clutchflite and a wedge motor and it never broke.

09-16-2017, 04:02 PM	#5
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: 8 3/4 and a 4spd A friend of mine put an 8 and 3/4 under his F body, ran it two years, never broke it. High 10's in the quarter at 3,100 lbs. just my experience. __________________ don,t have one

09-16-2017, 09:14 PM	#6
Kris Junior Member Join Date: Feb 2007 Location: Maine Posts: 49 Likes: 52 Liked 2 Times in 2 Posts	Re: 8 3/4 and a 4spd Depends on flywheel. If it's a steel 30# it will not stand up, rip the teeth off the ring gear. Something with adjustability maybe you can make it work. Good luck

09-16-2017, 09:16 PM	#7
James L Miller Member Join Date: Apr 2005 Posts: 494 Likes: 6 Liked 25 Times in 16 Posts	Re: 8 3/4 and a 4spd Well, as Emily Litella used to say, "Never Mind". I'll probably use the 8-3/4" in my Dart with the 273 but will have a 904TF to cushion the blow. __________________ Mopar 2 Ya! Last edited by James L Miller; 09-17-2017 at 11:44 PM. Reason: Got outvoted!

09-16-2017, 10:15 PM	#8
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 530 Likes: 429 Liked 242 Times in 81 Posts	Re: 8 3/4 and a 4spd By the time you do all the 8 3/4 fixes you will realize you coulda had a Dana. But by all means put an 8 3/4 in it. If you want to clean out your 8 3/4 parts supply. Always enough money to do it over but never enough money to do it right. __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.

09-16-2017, 10:19 PM	#9
Frank Castros VIP Member Join Date: Nov 2001 Location: The Lowcountry. Posts: 2,987 Likes: 2,622 Liked 2,741 Times in 967 Posts	Re: 8 3/4 and a 4spd Dana, set it and forget it.

09-17-2017, 04:51 PM	#10
T Ames Member Join Date: Jan 2009 Location: the Brazos Valley of TX Posts: 114 Likes: 161 Liked 125 Times in 33 Posts	Re: 8 3/4 and a 4spd Another vote for the Dana 60. You will not regret going with the Dana. The 8 ¾ might hold up in your application for a while, but the likelihood of breakage is probably good. Have a small block stocker with a Jerico, and have had zero issues since installing the Dana 60. Can’t tell you how many 8 ¾ gear sets I broke before the Dana (slow learner). Also, there’s another Class Racer thread about the efficiency of the Dana 60 vs. other axles due to its hypoid gear pressure angle – Mr. Greene alluded to that. Another bonus!