Competition Amsoil 75-90 differential fluid has to be drained every 1000 miles...

[Roger rodbolt]

Fluid looked good except for the chucks of spider gears that were spewed around. Broke two of the crosses at 340ft on a sled pull and all the spider gears. I replaced those but now I have one tooth on the pinion that is high , I suppose that I've cracked (bent??) a tooth on the pinion. Backlash and contact patten is fine except for the one tooth. I'm going to pull the pinion and dye check it for cracks. If it's not fractured I may dress it down a little and put it together for a pull on Saturday. Anyone have a 3. 54 ring and pinion that you will sell? I need it.

Guess, I'll just keep buying Amsoil..... got to blame the carnage on something . Larry

 

[Sled Puller]

Hehhehehe!

I'm going to send 4 sets of crushed spider gears and a broken yoke to Amsoil, and blame them for the carnage! And three turbos, and a box fiull of exploded boots... . and a grenaded intercooler... ... ... ... .



Dodge and Dana already tol me to go pound sand. :{

 

[F8LDOSE]

Be done with the Dana, thats what I'm doing. Only want to spend the money once, so I'm putting in a 14bolt GM rear and in the front end, a dana 60 out of a 79 1ton ford it has king pins and a bunch of other small things that make it better than the ones that come in our Dodges...

 

[Sled Puller]

I'm fairly certain the 14 bolt GM will not hold a 1000 pounds of tq at the pullin track better than a Dana 80.

 

[F8LDOSE]

Sled Puller, What do you think the weakpoint will be in a 14 bolt? I'll be using aftermarket axles made by Moser, a detroit locker, and 3. 73 gears, and of course the rear will be completely rebuilt with new bearings,etc... Is'nt the pinion support bearing an advantage? Also do you think the 3. 73's will ok with a 5speed and 35inch tires? Thank-you for any input.

 

[TxDieselKid]

J,

I think you forgott o say that you'd put Amsoil in it, in which case it would pass the SledPuller's inspection.



Just playing Gene,

Andrew

 

[F8LDOSE]

Honestly thou, I'll have Amsoil in it. I Have Amsoil syn. in my Mustang from front to rear and both my Cummins. (my buddy is a dealer here in Smithsburg, and he gives me good prices, if not I probably would'nt be able to afford it)

 

[T. Baker]

I'm suprised you sled puller guys don't just get 2 1/2 ton military axles or just a big rear out of a medium duty International and adapt it to you pick up.

 

[Hammer]

Hmmmm. .

Ok,You have my interest now.

How much more bulletproof can you get other than a Dana rear??. The Dana rear has long been standout for being nearly indestructable(except when Sled Puller is a drivin,LOL)and has been widely used in many applications that have put more power down to the ground than our trucks do. I will not believe that a GM 14bolt will out last the Dana if they are built the same way.



Here you say you are going to the Dana 60 from a Ford for the front and a GM 14 bolt for the rear and say the rear will be completely rebuilt and complain of your Dana not handling the job,was it rebuilt to withstand the intentions you put it thru??. Just curious myself. Lockers are available as are aftermarket axles for the Dana 80 so why make the switch to the GM 14bolt,cost prohibitive for your wallet??.



I'll have to answer the question you asked Gene about the weakpoint like this,your weakpoint will be when you install the GM rear to begin with. Your truck,your choice as we all know,but,I'd do a little more research before making a switch like that. One last thing,to achieve what your looking to do with the truck(I would guess and say sled pull)and make a ratio change for more wheel speed to accomadate the taller tires,why not do some research on tire sizes and see how much change only going to a 3. 73 over your 3. 55's make. There are a couple of ways to make a gear change for wheel speed to do what you want,but,with what you want to do time is not of the essence and you will have to make a choice early and live with it(at the track). Depending on track conditions and surfaces a taller tire will be more apt to have the torque pull the sled rather than wheel speed and you can the Sled Pullin king what happens when torque does the work... ... ..... Andy

 

[Sled Puller]

I think the 3:73's will be perfect, as well as the Mosers and Detroit.

I just feel the 14 is about the same as a Dana 70, going by how many I broke in my old Chevy gassers.

Have you compared actuall sizes of shafts and bearings in the 80?



Dana axles was one of the reasons I bought this truck.

 

[Sled Puller]

T baker,

The rules we run under here do not allow that change.

The guys in Indiana basically only need the body and the engine that came in the truck.



Torque+traction=CARNAGE

Everything in moderation.

 

[Roger rodbolt]

Is this a slam??

Originally posted by Sled Puller

I'm fairly certain the 14 bolt GM will not hold a 1000 pounds of tq at the pullin track better than a Dana 80.

Hey Gene, o'le buddy, are you insinuating that my little Cummins only puts 1000lbs of torque a the rear wheels? Why I can leave one half my special electrons at home and make a thousand ft. lbs. . 0R maybe you're referring to those twin turbo'd trucks? Oo. Oo.

 

[Sled Puller]

RR,

We must keep in mind that most people who read this only know dyno numbers. Most dynos quit at 1200 foot pounds.



So, to stay credible, we can only get away with saying 1000.



I personaly have a feeling if we could strap a dyno on the sled, and got a HP and TQ reading when the weight is binding down on the ol Cummins, it would shock the world!



I beleive I was ahead of you the two times we pulled, and you chickened out the third time! (wish I would have)

 

[Roger rodbolt]

Okay Gene, you got it almost right. I did make an "informed decision" and chickened out after the killer sled was collecting carnage. But I've only pull in the open class one time and you did get me by a couple feet. I spent this week campaigning, fundraising and chasing parts for my truck. The thing that I'm most proud of though is luring you out of hiding with this Amsoil thread. I don't believe that you have posted here since August??

 

[Sled Puller]

I put a sledpuller above politics!



Go get those socialists!

 

[drees1]

Sled dyno??

Originally posted by Sled Puller

RR,





I personaly have a feeling if we could strap a dyno on the sled,

Pardon my ignorance, I have only spectator experience pulling



It would seem pretty easy to calculate Hp as the sled is pulled. Work is force x distance. And Hp is work/ time.



force is the drawbar, a strain gage to input to a computer. distance by the tires on the sled, and time with a clock. All of that could be run by a PC with some I/O boards plugged into it.



You could develop a curve HP vs distance down the track.



Maybe not legal for racing, but good for practice?



Anyone tried to do it??



Doug Rees