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I plan on pulling the dana out of my dart next year and doing a well built 9. Chris up in Battle Ground is going to do the work.

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I now have learned more than I ever wanted to know about the Ford 8.8 rear end and have not changed my opinion one bit about my choice of rear axles for my 3,800#+ truck. It is getting the Dana 60 that I built from a thick wall truck axle with a spool, stock 4.10 gears, Ford "Torino" wheel bearings and Ford racing drum brakes. The truck will never run over 120mph in the quarter and I don't need to spend huge money on a rear end. This a dedicated race vehicle, but my goals are modest as is my budget. I want to have fun and not be a slave to the race car.

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Two different worlds, drag racing and 4x4 trucks. Dead hooking a 1500hp car is a lot harder on parts then a 4x4 spining off road where traction is a minumin. If you think a dana 70 is only 15-30 more pounds then a chromoly housing, aluminum center section 9 inch your crazy.

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Tell that to the jeep guys that have serious traction in the rocks, they slide a little back, wheel is under load and then catches...Many v8 powered jeeps have either broke something like a shaft or a housing or launched the vehicle over backwards. It aint muddin I am talkin about here... oh and the 70 with 40 spline axles are good up to 8000 ftlbs of momentary torque, the 60 is good for 6000 lbft of momentary torque with 35 spline. I don't see any 9 with factory parts rated to even close to those numbers the 8.8 with 31 splines is about 5100, the 9 is 5500 per one chart on the web. So you can decide what you want....just barely makin it or never going to break. I went with a 70, it was like 6 lbs heavier than an HD 60, I don't think I will ever break it under normal circumstances. Tim

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Thumper,what happened to your rearend in the car?

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It`s fine just planning ahead and if it stops raining I can get my last passes in till I step up.

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Two different worlds, drag racing and 4x4 trucks. Dead hooking a 1500hp car is a lot harder on parts then a 4x4 spining off road where traction is a minumin. If you think a dana 70 is only 15-30 more pounds then a chromoly housing, aluminum center section 9 inch your crazy.

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Tell that to the jeep guys that have serious traction in the rocks, they slide a little back, wheel is under load and then catches...Many v8 powered jeeps have either broke something like a shaft or a housing or launched the vehicle over backwards. It aint muddin I am talkin about here... oh and the 70 with 40 spline axles are good up to 8000 ftlbs of momentary torque, the 60 is good for 6000 lbft of momentary torque with 35 spline. I don't see any 9 with factory parts rated to even close to those numbers the 8.8 with 31 splines is about 5100, the 9 is 5500 per one chart on the web. So you can decide what you want....just barely makin it or never going to break. I went with a 70, it was like 6 lbs heavier than an HD 60, I don't think I will ever break it under normal circumstances. Tim

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not everyone has 1500 to 3000 hp looks like he makes some where around 650 to 700 so what ever he chooses it will work. Not a ford guy but I have seen mustangs run in the high eights with I guess a 8.8 with 4 lug wheels but I also seen cars with 8 3/4 go that fast too. but if he did put a dana in it . I think it could be done for under 1000.00 dollors not 1500.00 just for the center section for the nine inch. and not every one has a million dollors. people saying 15 to 50 pounds difference ?? I don't know what it would be I guess it depends on the length of it . and how much do you think that is going to slow a car up?? a couple hundreds?? I guess that's a lot if you have a super stock car. but most people are bracket racers just change your dail or put a big block in in or more spray to cover the 50 pounds

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what do I think ??? a dana 30 might work since you have a very light race car and a small block with no torque lol

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There is so much in this thread I don't know if I should even bother.

A friends 85 Mustang that he raced in a Street STOCK class running only 12.3's when it broke it's first 8.8, with traction lock, when it twisted the end off a stock axle, the rebuild upped it to a spool, c clip eliminators and 31 spline axles with more gear , this was behind a 5 speed running slicks and launching at 4000 rpm.

Fast forward to 2013 , different mustang , now a V6 5 speed, running low 13's , Ford Motorsport 8.8 with 3.73's, the trac lock lasted one short season , now it's got a tru trac in it, still with slicks and still launching at 4000 rpm , axles should be next ??? He has his original rear as backup , it's his daily driver ...

Dom , you can do all the bracing , axle bearing change , heavy duty caps you want to the 8 3/4 , pick whatever size pinion you want because in the end they are ALL THE SAME SIZE where the outer pinion bearing slides on ... you still won't fix the weak link ... RING AND PINION teeth breaking off .

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ive broken many 8 3/4s and many 8.8s also in my years of racing im on my 4th dana 60 and have never broke anything its kinda like you forget its even there its not a concern.my buddys 67 Superstock camaro had a stock 70runner dana 60 under for over 25yrs of racing with a t-brake also it wasnt until he put a 500"victor headed BB in it running low 9s then he finally broke the stock posi in it and twisted the axles.dont see to many bone stock rears doin that

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I'm just here to post pictures of 9" rears.





This is a truck rear end. It's a 2 speed BTW. Supposed to help Tony's SB go faster someone said.
I don't see how?
[image]http://i21.


That was Me

Tony was joking/sarcastic about going to the Junk yard and getting a Dump truck axel.

I joined in and stated to get the 2 Speed

If you couldn't catch that Chally, your not as smart as I thought you were.

My Poke was Both at Tonys SB and at the priors posts suggestion of using a HD 70 rear for a race car. My poke at you, I shouldn't consider you Challenged from now on should I?

Its just a poke, I know better, Quit speed reading.


EDIT; First post on page two.

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Sure I knew it was joke, the 2 speed rear.

I should have put some jokers in my post. I think it was my last post before bed last night and my mind might have been slightly clouded.

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I put a Eaton two speed under drive rear end in my old Class A motorhome, 1.5 ton I.H. chassis years ago, it really helped it a bunch 6.30 or so in under drive and 4.57 in direct, it had a 4.89 ratio in the stock rear end originally. I would leave it in under drive in town and shift it manually out on the road with a electric switch. It worked great for hills and backing the boat trailer into the water slowly Boy, some of the stuff we hot rodder do to get better performance from our vechiles Now back to are original discussion on them no good Ford rear ends of all sizes

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I had a BIG old 2 speed diff in my old Dodge dump truck
and it needed it... I put a 360 in the truck(had a
/6).. what a gutless wonder

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I had a BIG old 2 speed diff in my old Dodge dump truck
and it needed it... I put a 360 in the truck(had a
/6).. what a gutless wonder

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Yup this is our only truck left with a 2 speed rear, it's a 1990 truck antique/backup truck now. This is at least the second and probably the 3rd time I had it out getting rebuilt. This truck has a DT 466 diesel and a 5 speed trans. Learned to drive big trucks in this configuration back in 1978 at my third job. Then you had chueffer SP? license. I was grand fathered into a CDL, only took the paper test and still do every 4 years to maintain my hazmat endorsement.

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I was driving a wrecker back in 69 .. that was my
first with the 2 speed diff.. it was a diesel and
a 5 speed.. I had to have the chauffeur license also